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Notes: CPS/TMA/009 (R) (Week 5)
Names: »3074A «
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└─⟦f6d15510a⟧ Bits:30006171 8" Wang WCS floppy, CR 0259A
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…00……00……00……00…G…0a……00……00…G…0b…G…0d…G…00…G…02…G…06…F…0a…F…0e…F…02…F…06…E…0a…E…0e…E…02…E…06…D…0a…D…0e…D…02…D…06…C…0a…C…0e…C…02…C…05…1…01…/…08…/…0c…/…02…-…02…-…07…,…0c…,…00…,…07……1e… …1d……0a……1d……01……1d……07……1c……0c……1c……02……1c……06……1b……0b……1b……0e……1b……00……1b……86…1 …02… …02… …02… …02…
CAMPS Instructor's Manual for
MT/RST Course, Week 5
CPS/TMA/009
CDRL Logistics Support No. 03A
Line Item 8.2.4-B
Erik [rving
Kurt Nybroe-Nielsen
SHAPE (2), LT, NEN, ALG,
ER[, Conf. Mgmt., LU
ILS Train.Mgr. 840618
2
840618
Conf. Mgr. 840618
…0f…
3074A/ktd …02… CPS/TMA/009
…02… ER[/840618…02……02…ii
CAMPS Instructor's Manual for
MT/RST Course, Week No. 5…02… Issue 1…02… CAMPS
…0e…
821011 All Preliminary Issue of
Document
1 830617 All Completely new update
of
manual
2 840618 All General updates and
changes
in accordance with CAMPS
log
1434, 831021
…0f…
3074A/ktd …02… CPS/TMA/009
…02… ER[/840618…02……02…iii
CAMPS Instructor's Manual for
MT/RST Course, Week No. 5…02… Issue 1…02… CAMPS
…0e…
G̲E̲N̲E̲R̲A̲L̲ ̲A̲B̲B̲R̲E̲V̲I̲A̲T̲I̲O̲N̲S̲
DI Discussion
DE Demonstration
L Lecture
GW Group Work
T Test
I Informal Talk
S Self Study
LG Laboratory Guide
OH Overhead/Handout
…0f…
3074A/ktd …02… CPS/TMA/009
…02… ER[/840618…02……02… iv
CAMPS Instructor's Manual for
MT/RST Course, Week No. 5…02… Issue 1…02… CAMPS
…0e…
WEEK SPECIFIC ABBREVIATIONS…01……01…WEEK NO. 5
STB I CAMPS STUDENT TEXT BOOK VOL. 1
CPS/TMS/005
SLM CAMPS SITE LEVEL MAINTENANCE MANUAL
CPS/TCM/005
FD I FLOPPY DISK DRIVE OEM MANUAL
CPS/TCM/013
FD II FLOPPY DISK DRIVE SERVICE MANUAL
CPS/TCM/014
FTU FIELD TEST UNIT
HARDWARE MAINTENANCE MANUAL
MMD I MINI MODULE DRIVE MANUAL
CPS/REM/002
MMD II MINI MODULE DRIVE MANUAL
CPS/TCM/009
SMD I STORAGE MODULE DRIVE MANUAL
CPS/REM/003
SMD II STORAGE MODULE DRIVE MANUAL
CPS/TCM/010
SMD III STORAGE MODULE DRIVE MANUAL
CPS/TCM/011
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840618
1
DISK CONTR. & ADAPTOR 5:1:1 45
CAMPS…0f…
- Describe the principles of the functional and operational
use of the Disk Controllers and connected Adaptors.
- Explain the use of Controller Indicators.
Perform maintenance and switch settings on controllers.
- The student should be able to:
Identify the Controller Indicators
- Explain the use of the Controller Indicators.
Perform switch setting.
CAMPS Classroom
CAMPS Trainingroom
L, DE, I
14 view foils
Controller modules.
STB I. Sec. 16-17
SLM Sec. 4.390-393
4.408-411
…0e…
3074A/ktd
840618 1
FLOPPY DISK DRIVE 5:1:2-3 2x45 CAMPS…0f…
- Describe the principles of the functional and operational
use of the Floppy Disk Drive.
- Explain basic Read/Write theory.
The student should be able to explain the use of the
Control Logic Module and the Read/Write Logic Module
and to describe the functions of the lines used by
the Logic Modules.
CAMPS Classroom
CAMPS Trainingroom
L, DE, I
16 Viewfoils
Floppy Disk Drive
FD I
FD II
…0e…
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840618 1
FD & DISK CONT. EXERC. 5:1:4 45 CAMPS…0f…
- Enable and Disable Disk Controllers onto and from
Mainbus A or B.
- Replace Disk/Floppy Disk Controllers
- Perform maintenance and replacement of parts.
Result of Practical Exercises
(The Floppy Disk Controller and Disk Controller shall
be fully operational at conclusion of lesson)
CAMPS Trainingroom
GW, S, DI
Video Display Unit
Floppy Disk Controller
Disk Controller
STB I. Sec. 16
…0e…
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840618 1
FD DRIVE EXERCISE 5:1:5-6 2x45 CAMPS…0f…
- Replace Floppy Disk Drive and test for malfunctions
in drive operation
- Perform maintenance and replacement of parts.
Result of Practical Exercises
(The Floppy Disk Drives shall be fully operational
at conclusion of lesson)
CAMPS Trainingroom
GW, S, DI
Video Display Unit
Floppy Disk Drive
STB I. Sec. 16
…0e…
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840618 1
FIELD TEST UNIT 5:2:1-3 3 x 45 CAMPS…0f…
- Describe the principles of the functional and operational
use of the Field Test Unit
- Describe the Cable Config.
- Describe the Rotary Switches
- Describe the Toggle Switches
- Describe the Keyboard Panel
- Describe the LED Display
The student should be able to identify and explain
the use of the switches and indicators on the FTU frontpanel.
CAMPS Classroom
CAMPS Trainingroom
L, DE, I
15 viewfoils
Field Test Unit
FTU
…0e…
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840618 1
FIELD TEST UNIT EXERC. 5:2.4-6 3 x 45 CAMPS…0f…
Use the Field Test Unit Manual
Perform Power Up Initialization procedure
Perform Drive Selection procedure
Perform Direct/Cont Seek procedures
Perform Write/Read procedures
Perform maintenance and replacement of parts.
Result of Practical Exercises
(after the exercise the Storage Module Drive shall
be connected in the Camps Configuration and shall be
fully operational)
CAMPS Classroom
CAMPS Trainingroom
GW, S, DI
Field test unit
Storage Module Drive
Scratch-Pack
FTU
3074A/ktd
840618 1
SMD AC/DC POWER DISTR. 5:3:1 45 CAMPS…0f…
- Describe the principles of the Storage Module Drive
Power Distribution
- Explain the principles of the power-on sequence
and Load Seek/Head Loading
- Localize parts from schematic diagrams
The student should be able to localize circuit-breakers,
fuses, and 5 Volt adjustment Pot.meters.
He should also be able to replace fuses and perform
5 V adjustment.
CAMPS Classroom
CAMPS Trainingroom
L, DE, I
11 view foils
Storage Module Drive
SMD I, II, III
…0e…
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840618 1
SMD MECH. FUNCTIONS 5:3:2 45 CAMPS…0f…
- Describe the principles of the functional use of
the Storage Module Drive
- Describe the Data Storage Medium
- Explain the principles of the Storage Module Drive
Servo Disk Format
The student should be able to localize the positioning
device and describe the principles of positioning the
heads at the desired track.
CAMPS Classroom
CAMPS Trainingroom
L, DE, I
7 view foils
Disc Pack
Storage Module Drive
SMD I, II, III
…0e…
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840618 1
SMD OPERA. FUNCTIONS 5:3:3 45 CAMPS…0f…
- Describe the principles of the operational use of
the Storage Module Drive
- Describe the principles of the Read/Write Circuits
- Explain the use of maintenance switches and indicators
The student should be able to identify any fault indicated
on the fault card.
CAMPS Classroom
CAMPS Trainingroom
L, DE, I
9 view foils
SMD-Fault card AO4
Storage of Module Drive
SMD I, II, III
…0e…
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840618 1
STORAGE MOD. DRIVE EXERC. 5:3:4-6 3 x 45 CAMPS…0f…
- Use the SMD Maintenance and Test Manual
- Perform plus and minus 5V adjustments
Result of Practical Exercises
(The Storage Module Drive shall be fully operational
at conclusion of lesson)
CAMPS Classroom
CAMPS Trainingroom
GW, S, DI
Field Test Unit
Multimeter
Oscilloscope
SMD I, II, III
FTU
…0e…
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840618 1
MMD AC/DC POWER DIST. 5:4:1 45 CAMPS…0f…
- Describe the principles of the MMD Power
- Distribution with respect to:
AC Power and Overload Protection
DC Power and Overcurrent Protection
- Localize parts from schematic diagrams
The student should be able to localize circuit breakers
and fuses and thermoswitch.
He should also be able to replace fuses and perform
5V adjustment.
CAMPS Classroom
CAMPS Trainingroom
L, DE, I
12 view foils
Mini Module Drive
MMD I
MMD II
…0e…
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840618 1
MMD MECH. FUNCTIONS 5:4:2 45 CAMPS…0f…
- Describe the principles of the functional use of
the Mini Module Drive
- Discribe the Disk Format and Head Configuration
- Explain the functional use of the Mini Module Drive
Servo Surface
The student should be able to localize the positioning
device and explain the use of quadbits positioning
the heads at a desired track.
CAMPS Classroom
CAMPS Trainingroom
L, DE, I
8 view foils
Mini Module Drive
MMD I, II
…0e…
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840618 1
MMD OPERA. FUNCTIONS 5:4:3 45 CAMPS…0f…
- Describe the principles of the operational use of
the Mini Module Drive
- Discribe the principles of the Read/Write Circuits
- Explain the use of the Drive's Fault Indicators
The student should demonstrate that he is able to interpret:
- start up and first seek errors
- operational errors
- seek errors
CAMPS Classroom
CAMPS Trainingroom
L, DE, I
9 view foils
Mini Module Drive
MMD, I, II
…0e…
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840618 1
MINI MODULE DRIVE EXERC. 5:4:4-6 3 x 45 CAMPS…0f…
- Use the MMD Maintenance and Test Manual
- Perform plus and minus 5V Adjustments
- Perform Seeks according to FTU Manual.
Result of Practical Exercises
(The Mini Module Drive shall be fully operational at
conclusion of lesson)
CAMPS Trainingroom
GW, S, DI
Field Test Unit, OEM-Equipment
Multimeter, Oscilloscope
MMD I, II
FTU
…0e…
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840618 1
WEEKLY PROGRESS TEST 5:5:1 45 CAMPS…0f…
Evaluate his own comprehension of subjects
taught in this week.
The results of this test will be recorded on the "Students
Progress Report".
Corrections of answers.
CAMPS Classroom
(good separation required)
Progress Test.
Test time 45 min.
Progress Test: A copy for each student
6 viewfoils (3 with questions,
3 with answers).
…0e…
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840618 1
REVISION PERIOD 5:5:2-3 2x45 CAMPS…0f…
Check his own knowledge of the topics of the week.
Analyses of questionnaires.
Discussion of various topics.
CAMPS Classroom
(COMM CEN)
I, DI, S, L, DE
Overheads
Printed circuitboard
Various Manuals.
…0e…
3074A/ktd
840618 1
FIELD TEST UNIT EXERC. 5:5:4-6 45 CAMPS…0f…
- Check the I/O Lines.
- Flag a bad Sector.
The student should be able to explain the shape of
the obtained graph with respect to the element involved
in a seek:
- Accelleration fase, coast face, decelleration fase.
CAMPS Trainingroom
GW, S, DI
Field Test Unit.
Oscilloscope.
FTU
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MT/RST 5:1:1 840618
DISK CONTROLLERS & ADAPTORS L/DE/I
1…0f…
INTRODUCTION OH 1 The Disk Controller interfaces through a
TO Disk Adapter to one Storage Module Drive
DISK CONTROLLER or one Mini Module Drive. However, it
is possible to interface to as many as
four drives, which then are Daisy Chained.
The controller is mounted in the Channel
Unit Crate together with other I/O Units.
STB I.
Sec. 17.2 + 37.
OH 2 The Disk Controller comprises two functionally
independent modules:
An I/O-module, which is the disk controlling
device, and a RAM module, which serves as
a memory device.
On board is also a Busswithing module that
may dynamicly switch from one Bus to another
(Mainbus A - Mainbus B.(Mainbus - I/O Bus)),
in case of failure on Bus/CIA/Data Channel
or PU.
The I/O module, called Disk I/F and formatter
provides all controller and formatter functions
for the disk drives connected.
Since a daisy chain configuration is used,
only one drive may be written to or read
from at a time. However, overlapped seeks
are possible, since all drives are at all
times monitored for "seek over" conditions.
The communications with the CPU is carried
out via the mainbus (I/O commands), while
memory is accessed via the internal bus.
The memory is used as an intermediate storage
between disk and I/O Bus A or B. The size
of the memory is 32K word.
STB I.
Sec. 17.3-7.…86…1 …02… …02… …02…
…02… …02…
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MT/RST 5:1:1 840618
DISK CONTROLLERS & ADAPTORS L/DE/I
2 …0f…
MAIN BLOCKS OH 3 This figure describes the structure of the
module. The blocks contain the following
functions:
Block 1: Mainbus logic for controller part. Micro
control store and program sequencer.
Block 2: Control processor. Controller memory logic.
Block 3: Parallel/serial converter. Disk Controller
adapter interface. Clock and Power monitoring.
Block 4: RAM.
Block 5: Mainbus logic for RAM. Main Bus receivers/drivers.
Block 6: Mainbus A Interface 5V powerswitch
Block 7: Mainbus B Interface +̲ 12V powerswitch.
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MT/RST 5:1:1 840618
DISK CONTROLLERS & ADAPTORS L/DE/I
3 …0f…
CONTROLS & OH 4 The Module Address of 6 bits is selectable
INDICATORS on Switch S2 and RAM Address is selected
on Switch S1.
SLM
Sec. 4.390-393
The Disk controller is initialized by an
Enable Command. The Busy-LED is on until
the initialize and the Built-In Test-Sequence
of the microcontroller has been performed.
On the front panel light emitting diodes
indicate the enabled bus interface.
Bus A (yellow) indicates that the Disk Controller
is enabled onto Mainbus A.
Bus B (yellow) Disk Contr. - Mainbus B.
The A-Bus LED and B-Bus LED are never active
at the same time.
A Built-in Test procedure is initiated upon
Power up, and a Red Test LED is extinguished
after app. 10 sec. if the BIT procedure has
been carried out succesfully.
The Disk Controller is reset from the Main
Bus by a Disable Command.
DISK OH 5 The Disk Controller is an I/O module which
CONTROLLER responds to I/O commands from the currently
ADAPTOR selected bus.
The controller interfaces to the Disk Adapter
for connection of one or two drives in daisy
chain.
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MT/RST 5:1:1 840618
DISK CONTROLLERS & ADAPTORS L/DE/I
4 …0f…
OH 6 The Controller Adapter provides interface
to the drive through two cables:
a) The A-cable is a flatcable to all drives.
Through this cable Timing- and Control
signals operate the drives, and the status
of drives is monitored.
The B-Cable is a flatcable to only one
specific drive. Through this cable the
datastream and clock signals are interchanged
between the drive and the computer.
INTRODUCTION OH 7 The Standard Floppy Disk Controller performs
TO the interface between the Computer System
STANDARD and two Floppy Disk Drives through a
FLOPPY Standard Floppy Disk Adaptor. However, it
is
DISK CONTROLLER possible to interface to as many as four
Drives, which are then Daisy Chained. The
Controller is mounted in the Channel Unit
together with other I/O Units.
OH 8 The Floppy Disk Controller comprises a controlling
module, which takes care of I/O of data to
and from drive, and a RAM module, which is
the Memory for Data Transfers. Also onboard
is a Bus switch Control that may dynamically
switch from one Bus to another (Mainbus A
- Mainbus B, (Mainbus = I/O-Bus))
in case of failure on BUS/CIA/Data Channel/PU.
The Controlling Module contains a Micro Programable
Processor which provides the controller functions
for the disk drives connected. The Floppy
Disk Formatter provides the formatting of
Floppy Disks to be used. The RAM memory is
used for data transfer to and from disks
and it comprises exactly the amount of data
for one sector on Floppy Disk; 128 bytes
= 64 words.
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DISK CONTROLLERS & ADAPTORS L/DE/I
5 …0f…
DATA FORMAT OH 9 As Data Formats of Floppy Disks vary with
different products, it is emphasized that
the Floppy Disk Controller will only work
with Floppy Disk designed for IBM SOFT SECTORING
FORMAT.
CONTROLS OH 10 The I/O Module Device Address of 6 bits is
selected on switch S1.
INDICATORS OH 11 The indicator on the Front Panel provides
info to the user of which State the FD Controller
is in.
OH 12 The BUSY-LED is ON/OFF during normal Floppy
Disk operations. The three figures show three
sequences used in normal operation, when
the BUSY-LED goes ON/OFF.
STRAPS OH 13 The strapping on the circuitboard is done
to a specific application. Whenever replacing
a Floppy Disk Controller, Straps shall be
positioned According to Disk Drive and Floppy
Disk Format.
SLM
Sec. 4.408-4.411
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DISK CONTROLLERS & ADAPTORS L/DE/I
6 …0f…
BUILD-IN TEST OH 14 The BUILD-IN Test is initiated upon power
up:
After power-up three LED's (Power, Test and
Busy) on the front panel will turn ON, indicating
the following:
A power failure is detected (during power-up),
the Busswitch is disabled.
The module is ready to start its BUILD-In
Test, when it receives a command that will
enable the module to Mainbus A or B.
An H/W error detected during Build-In Test
will force the module to a well defined state
and the Test LED will remain lighting.
In this state the module will not respond
to Mainbus access concerning I/O commands.
If the Test is completed without any error
detected, an interrupt is generated, the
Status register updated and Mainbus access
is service.
The Build-In Test will clear RAM memory.
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MT/RST 5:1:2-3 840618
FLOPPY DISK DRIVE L/DE/I
1 …0f…
INTRODUCTION OH 1 The Floppy Disk Drive consists of Read/Write
and Control Electronics, Drive Mechanism,
Read/Write Head, Track positioning Mechanism,
and a removeable Diskette.
These components perform the following functions:
a: Interpret and generate Control Signals
b: Move Read/Write Head to the selected Track
c: Read and Write Data
The interface signals for the internal functions
of the Floppy Disk Drive and the relationship
of signals to each other are shown.
FD I. Sec. 2.5.
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FLOPPY DISK DRIVE L/DE/I
2 …0f…
FUNCTIONAL OH 15 The Head Positioning Actuator (Stepper
DESCRIPTION Motor) positions the Read/Write Head to the
OH 15 desired Track on the Diskette.
The Head Load Actuator loads the diskette
against the Read/Write Head and Data may
be recorded on or read from the diskette.
When not reading or recording the Head Load
Actuator unloads the Diskette to reduce wear
on both the diskette and the Head.
OH 14 The diskette drive Motor continuously
rotates the spindle at 360 rpm through a
Belt-drive system.
OH 15 A Registration Hub, centered on the face
of
the spindle, positions the diskette. A clamp
moving in conjunction with the Cartridge
Guide fixes the diskette to the Registration
Hub.
OH 15 An electrical Stepping Motor and Lead Screw
position the Read/Write head. The stepping
motor rotates the lead screw clockwise or
Counter clockwise in 15…0e…0…0f… increments. A
15…0e…0…0f… rotation of the lead screw moves the
head one Track position. The Host System
increments the stepping motor to the desired
track.
OH 15 The Read/Write Head is mounted on a carriage
located on the Head Position Actuator lead
screw. The diskette is held in a Plane Perpendicular
to the Read/Write head by a Plate located
on the base casting.
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MT/RST 5:1:2-3 840618
FLOPPY DISK DRIVE L/DE/I
3
…0f…
OH 15 The diskette is loaded against the head with
OH 16 a Load Pad Actuated by the Head Load
Solenoid.
The Read/Write heads are in direct contact
with the diskette.
FD II. Fig. 5-2.
ELECTRICAL OH 2 Interface to the Floppy Disk Drive is
INTERFACE divided into two categories:
Signal and Power.
Signal Interface consists of:
Control and Data Transfer.
Signal Interface Lines are digital in nature
and provide Input signal to the Drive or
Output signal from Drive to Host System.
Arrows on figure shows whether individual
signal is IN or OUT.
Signal Interface via Flatcable ON J1/P1 Connector.
10 signal INPUT Lines to be explained (4
dir + 4 Mux+ 2 OPT)
7 signal OUTPUT Lines to be explained.
Remember to terminate the Last Drive of the
four Input Lines that are multiplexed (MUX).
FD I. Sec. 4.13.
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MT/RST 5:1:2-3 840618
FLOPPY DISK DRIVE L/DE/I
4 …0f…
OH 3 The Signal Interface Connector P1
is plugged onto the Drive Printed Circuit
Board at the very rear.
The AC Power connector P4 is plugged into
the connector J4 located at the rear of the
drive and just below AC Drive Motor Capacitor.
The DC Power connector P5 is plugged into
the connector J5 located on the non-component
side of the Printed circuit board.
FD I. Sec. 5.21
OH 4 The voltage specifications are outlined in
this table.
FD II. Sec. 2.3-4
DISKETTE OH 5 The Diskette is a Flexible Disk enclosed
in
HANDLING a plastic jacket. It can be loaded into the
Drive by depressing the Latch (containing
the Activity LED) and inserting the Diskette
with the Label facing upward until fully
inserted. Then move the handle bar down until
locked.
To remove Diskette, depress the Latch (with
the LED) and catch the Diskette.
The Diskette can be loaded and unloaded with
all Power on and Drive Spindle rotating.
FD I. Sec. 8.38.
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FLOPPY DISK DRIVE L/DE/I
5 …0f…
OH 6 To be sure that data are not recorded acci-
dently into sectors that comprises data not
to be destroyed, the user has the possibility
of write protecting the Diskette.
This is done by Removing the Tab covering
the Write Inhibit Notch.
There is a number of Precautionary procedures
to follow, when the Diskette is removed from
the Drive. Seven of the most important are
listed.
FD I. Sec. 8.39.
TRACK OH 1 Before any Recording of data to or Recove-
ACCESSING ring of data from the Diskette, the Read/Write
Head must be positioned over the desired
Track (and desired sector).
The Stepper motor takes care of the physical
position.
Seeking the Read/Write head from one Track
to another is accomplished by selecting the
desired direction utilizing the DIRECTION
SELECT Interface Line and pulsing the STEP
Line.
Multiple track accessing is accomplished
by repeated pulsing of the STEP Line until
the desired track has been reached.
Each pulse on the STEP line will cause the
read/write head to move one Track either
in or out depending on the DIRECTION SELECT
Line.
These procedures are called Track Accessing
and are performed as a Forward Seek or Reverse
Seek controlled by the Stepper Control Logic.
Tracks are concentric Data Recordings with
erased areas between them.
FD I. Sec. 3.7-11.
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FLOPPY DISK DRIVE L/DE/I
6 …0f…
READ/WRITE OH 7 The Read/Write Head is a ring with a gap
and
OPERATIONS a coil wound at some point on the ring. When
current flows through the coil, the flux
induced in the ring fringes at the gap.
As the diskette recording surface passes
by the gap, the fringe flux magnetizes the
surface in a horizontal direction.
FD II. Fig. 4-12.
OH 8 During a Write Operation a bit is recorded
When the flux direction in the ring is reversed
by rapidly reversing the current in the coil.
The fringe flux is reversed in the gab and
hence the portion of the flux flowing through
the oxide recording surface is reversed.
If the flux reversal is instantaneous in
comparison to the motion of the diskette,
the portion of the diskette Surface that
just passed under the gap is magnetized in
one direction, while the portion directly
under the gap is magnetized in the opposite
direction.
This Flux Reversal represents a BIT.
FD II. Sec. 4.8.
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FLOPPY DISK DRIVE L/DE/I
7 …0f…
OH 9 During a Read Operation, a bit is read when
the flux direction in the ring is reversed
as a result of a flux reversal on the diskette
surface.
The gap first passes over an area that is
magnetized in one direction, and a constant
flux flows through the ring and coil. The
coil registers no output voltage at this
point.
When a recorded bit passes under the gap,
the flux flowing through the ring and coil
will make a 180…0e…o…0f… reversal. This means that
the flux reversal in the coil will cause
a voltage output pulse.
FD II. Sec. 4.9.
OH 10 This shows the recording flux transitions
and corresponding pulse relationships.
FD II. Fig. 4-15.
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MT/RST 5:1:2-3 840618
FLOPPY DISK DRIVE L/DE/I
8 …0f…
OH 11 The Read/Write Head contains three coils.
Two read/write coils are wound on a single
core, center tapped, and one erase coil is
wound on a yoke that spans the track being
written.
During a write operation, the erase coil
is energized. This causes the outer edges
of the track to be trim erased.
Each bit written will be directed to alternate
read/write coils. This results in a change
in the direction of current flow through
the read/write head. This produces a change
in the flux pattern for each bit.
The current through either read/write coils
will cause the old data to be erased as new
data is recorded.
During a read operation as the direction
of flux changes on the diskette surface passing
under the gap, current will be induced into
one of the windings of the read/write head.
This results in a voltage output pulse. When
the next data bit passes under the gap, another
flux change in the recording surface takes
place.
This causes current to be induced in the
other coil producing another voltage output
pulse.
FD II. Sec. 4.7.
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FLOPPY DISK DRIVE L/DE/I
9 …0f…
WRITE OH 12 WRITE DATA pulses (clock and data bits)
are supplied by the using system.
The write trigger "flips" with each pulse.
The Q and Q outputs are fed to alternate
writedrivers.
WRITE GATE from the using system and NOT
WRITE PROTECT are added together to provide
write current.
The output of one of the write drivers allows
write current to flow through one half of
the read/write coil.
When the write current is sensed flowing
to the write drivers, a signal is generated
to provide erase current.
FD II. Sec. 4.8.
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FLOPPY DISK DRIVE L/DE/I
10 …0f…
READ OH 13 When the using system requires data from
CIRCUIT the diskette drive, the using system must
first load the head.
With loading of the head and WRITE GATE being
inactive, the read signal is fed to the amplifier
section of the read circuit.
After amplification, the read signal is fed
to a filter where the Noise spikes are removed.
The read signal is then fed to the differential
amplifier.
The frequency of the read signal varies,
due to clockpulses mixed with data signals.
The differential amplifier will amplify the
read signals to even levels.
A shaper circuit will make square waves out
of the same wave read signals.
As clockpulses and datasignals are mixed,
they will have to be separated to capture
the databits.
This is done in the Data Separation Circuit.
FD II. Sec. 4.9-11.
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FD & DISK CONTR EXERC GW, S, DI…0f…
This lesson is devoted to perform floppy
disk drive exercises and disk controller
exercises.
Perform exercise according to STUDENT LABORATORY
GUIDE section 5:1:4.
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FD DRIVE EXERCISE GW, S, DI…0f…
This lesson is devoted to perform floppy
disk drive exercises.
Perform exercise according to STUDENT LABORATORY
GUIDE section 5:1:5-6.
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FIELD TEST UNIT L/DE/I
1 …0f…
INTRODUCTION OH 1 The Field Test Unit (FTU) is a portable
self contained unit housed in a suit-case-
type carrying case.
FTU Sec. 1.1.
The FTU contains a front panel assembly,
power supply, logic chassis assembly, power
cable, I/O-cables, and the head alignment
adaptor for Storage Module Drive.
OH 2 The front panel assembly contains a hexi-
decimal keyboard, various switches, indicators,
and test points.
The FTU simulates off-line input/output control
functions of a disk storage controller and
is used in maintaining the Storage Module
Drive (SMD) and Mini Module Drive (MMD).
FUNCTIONAL The FTU provides seven access modes, six
DESCRIPTION read/write modes, and three modes for determining
head selection.
FTU Sec. 1.1-2.
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FIELD TEST UNIT L/DE/I
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ACCESS MODE A̲C̲C̲E̲S̲S̲ ̲M̲O̲D̲E̲
OH 2 In access modes (seeks), the moveable heads
in the drive are positioned over a particular
cylinder on the disk pack.
1 D̲i̲r̲e̲c̲t̲ ̲S̲e̲e̲k̲
The drive under the test performs a single
seek to the cylinder number selected by
the operator.
2 D̲i̲r̲e̲c̲t̲ ̲C̲o̲n̲t̲i̲n̲u̲o̲u̲s̲
The drive performs seeks between cylinder
zero and the cylinder number selected
by the operator.
3 S̲e̲q̲u̲e̲n̲t̲i̲a̲l̲ ̲F̲o̲r̲w̲a̲r̲d̲
Starting at cylinder zero, the drive performs
sequentially increasing seeks at cylinder
intervals selected by the operator. After
seeking the last track, it will return
to cylinder zero and repeat the operation.
4 S̲e̲q̲u̲e̲n̲t̲i̲a̲l̲ ̲R̲e̲v̲e̲r̲s̲e̲
Starting at the maximum cylinder, the
drive performs sequentially decreasing
seeks at cylinder intervals selected by
the operator. After seeking cylinder zero,
it returns to the maximum cylinder and
repeats the operation.
5 S̲e̲q̲u̲e̲n̲t̲i̲a̲l̲ ̲F̲o̲r̲w̲a̲r̲d̲/̲R̲e̲v̲e̲r̲s̲e̲
Starting at cylinder zero, the drive performs
sequentially increasing seeks up to the
maximum cylinder followed by sequencially
decreasing seeks down to cylinder zero.
The seeks are in increments selected by
the operator.
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FIELD TEST UNIT L/DE/I
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FUNCTIONAL 6 R̲a̲n̲d̲o̲m̲ ̲S̲e̲e̲k̲
DESCRIPTION
(cont'd) OH 2 The drive seeks cylinder addresses
generated randomly by the microprocessor.
7 X̲ ̲-̲ ̲N̲ ̲S̲e̲e̲k̲
The drive seeks from each cylinder to every
higher numbered cylinder and back, thus performing
all possible seeks.
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FIELD TEST UNIT L/DE/I
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FUNCTIONAL R̲e̲a̲d̲/̲W̲r̲i̲t̲e̲ ̲M̲o̲d̲e̲s̲
DESCRIPTION OH 2 The FTU generates serial (NRZ OR MFM) write
(cont'd) data (at a rate determined by the servo
clock signal transmitted from the unit
READ/WRITE under test)
MODES
When a repeated access mode is selected,
read/write operation is completed at the
selected cylinder.
Then a seek is initiated to the next cylinder
address (as determined by the access mode)
and the read/write operation repeated. This
seek - read/write sequencing - continues
until the end of test or until the STOP key
is pressed.
For direct seeks, the read/write operation
continues at the selected cylinder (depending
upon the head select mode) until the STOP
key is pressed.
The mode of head selection chosen determines
the number of tracks read or written during
each read/write operation.
For manual head selection, the FTU reads
or writes only the track under the head selected.
For sequential head selection, the FTU sequences
the heads to read or write each track in
the cylinder.
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FIELD TEST UNIT L/DE/I
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FUNCTIONAL When the highest-numbered head has been
DESCRIPTION OH 2 exercised, the drive seeks to another
(cont'd) cylinder (except in direct seek) and
repeats the read/write operation at the new
cylinder, starting with head zero:
For random head selection, the FTU randomly
selects one head per cylinder for its read/write
operation.
The same options are available for record
selection. In the manual record mode, one
manually selected record is written or read
for each selected track. In sequential record
mode, the same operation takes place once
per track on randomly chosen record.
FTU Sec. 1.2-6.
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FIELD TEST UNIT L/DE/I
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FUNCTIONAL 1 W̲r̲i̲t̲e̲ ̲F̲o̲r̲m̲a̲t̲
DESCRIPTION
(cont'd) OH 2 The FTU writes each selected track with
the appropriate track address and a repetitive
16-bit pattern that has been entered on
the FTU keyboard. The FTU also provides
a means for indicating a defective track
when using the write format mode.
2 W̲r̲i̲t̲e̲/̲R̲e̲a̲d̲ ̲F̲o̲r̲m̲a̲t̲
The FTU commands the drive to alternate
between writing the appropriate track
address and repetitive data pattern and
reading them back on each selected track.
3 W̲r̲i̲t̲e̲
After the track address has been read
and verified, the FTU writes each selected
track with a repetitive 16-bit data pattern
that has been entered on the FTU keyboard.
On drives that transmit MFM read data
to the FTU, the address is not read.
4 R̲e̲a̲d̲
The FTU commands the drive to read data
from each selected track after the track
address has been read and verified. On
drives that transmit MFM read data to
the FTU, the address is not read.
5 W̲r̲i̲t̲e̲/̲R̲e̲a̲d̲
The FTU commands the drive to alternate
between writing a repetitive data pattern
and then reading it on each selected track.
6 A̲c̲c̲e̲s̲s̲ ̲O̲n̲l̲y̲
The FTU does not command a read or write
operation after each track is accessed.
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FIELD TEST UNIT L/DE/I
7 …0f…
CABLE OH 3 The Cable Configuration, that interfaces
the
CONFIGURATION FTU with the Drive, consists of four cables:
FTU Sec. 2.9 (60 PIN STD/MUX)
F̲T̲U̲
The PCB (CJHX) in slot 2 comprises three
connectors. Cables A4, A2 and B5 is connected
to the connectors on Card.
D̲R̲I̲V̲E̲
The A-Cable (A8) is connected to the 60 pin
connector IJ3 and the B-Cable (B5) is connected
to the 26 pin Connector IJ2.
CONTROL & Controls & Indicators are located on
INDICATORS the Front Panel of the FTU.
FTU Sec. 2.11-29.
OH 4 D̲A̲T̲A̲ ̲E̲N̲T̲R̲Y̲ ̲S̲w̲i̲t̲c̲h̲
A rotary Switch can be set to various position
to allow information to be entered into the
FTU.
Refer Table 2-2
R̲D̲/̲W̲R̲T̲ ̲S̲E̲L̲E̲C̲T̲ ̲S̲w̲i̲t̲c̲h̲
A rotary Switch which determines the operation
performed by the drive after Track accessed.
Refer Table 2-2.
A̲C̲C̲E̲S̲S̲ ̲S̲E̲L̲E̲C̲T̲ ̲S̲w̲i̲t̲c̲h̲
A rotary Switch that enables selection of
a number of accessing modes for the Drive.
Refer Table 2-2.
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FIELD TEST UNIT L/DE/I
8 …0f…
OH 5 T̲O̲G̲G̲L̲E̲ ̲S̲W̲I̲T̲C̲H̲E̲S̲
Switch position - Refer Table 2-2
OH 6 K̲E̲Y̲B̲O̲A̲R̲D̲ ̲P̲A̲N̲E̲L̲
Used to enter Data into the FTU.
Refer Table 2-2
OH 7 L̲E̲D̲ ̲D̲I̲S̲P̲L̲A̲Y̲
LED's in Row 1 and Row 2 are illuminated
to describe the Data in the FTU:
Row 3 describes the condition of the FTU.
Refer Table 2-2
OH 8 T̲E̲S̲T̲ ̲P̲O̲I̲N̲T̲S̲ ̲A̲N̲D̲ ̲J̲A̲C̲K̲S̲
Signals used in the FTU or in the Interface
between FTU and Drive can be monitored on
the Test Points.
Refer Table 2-3
Two Banana Jacks are used for Head Alignment
procedures.
FTU Sec. 2.29-32.
OH 9 This describes how to load Data into the
FTU as well as to retrieve Data form the
FTU.
FTU Sec. 2.33.
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FIELD TEST UNIT L/DE/I
9 …0f…
NOTE ... NOTE: The instructor should not display OH10..OH15
until the students have performed FIELD
TEST UNIT EXERCISE Step 1. Then the students
can compare their list to the OH's.
OH 10 - This is the Procedures to use to set up the
OH 15 FTU and make it ready for operations.
FTU Sec. 2.34-36.
Sec. 2.40-42.
Sec. 2.60.
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FIELD TEST UNIT EXERC GW, S, DI…0f…
This lesson is devoted to perform field test
unit exercises.
Perform exercise according to STUDENT LABORATORY
GUIDE Section 5:2:4-6.
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SMD AC/DC POWER DISTRIBUTION L, DE, I
1
…0f…
INTRODUCTION DEM- SMDI and SMDII will be used in this lesson.
TO POWER Manuals
DISTRIBUTION
GENERAL OH 1 The STORAGE MODULE DRIVE comprises several
functions, some of these being logic ones.
All circuits and electromechanical devices
are necessary for recording data on and recovering
data from the surface of the disks in the
disk pack.
All the functions performed by the drive
is done under the direction of the controller.
SMD I. Sec. 1.7.
OH 2 The Power System Function supplies the
power necessary to all drive functions to
perform well.
The drive power supply receives its input
from the Site Main Power Source.
Power Systems Functions describes the power
distribution to circuits in the drive necessary
for operation.
The power supply produces AC power as well
as DC power.
SMD I. Sec. 3.1-2.
OH 3 With the Drive Power Plug P1 plugged in
-
the AC-Power Circuit Breaker, A1CB1, distributes
AC-power to the Elapsed Time Meter M1,
the Rear Door Fans, the Blower Motor, and
the Drive Motor.
The Power Supply Circuit Breaker, A1CB2,
supplies AC-power to the Transformer T1.
Both Circuit Breakers serve as overload protection
devices, too.
SMD I. Sec. 3.3-4.
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SMD AC/DC POWER DISTRIBUTION L, DE, I
2
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POWER-ON OH 4 In order to initiate a Power-On sequence,
power distribution must be complete.
The sequence itself is the chain of events
which allow the drive motor to start and
the heads to load.
First: The brakes are released.
Second: Power is applied to the drive motor.
Third: When spindle speed is OK, the heads
are loaded onto the disk pack.
No power on sequence will take place, if
pack cover (access to disk pack) is not closed
(S3).
It takes approx. 20 seconds for the drive
motor to get sufficiently up to speed (about
3000 rpm).
SMD I. Sec. 3.6-10.
LOAD SEEK After a delay of 10 seconds, the Head Load,
which means they move from retract position
over the disk surface.
The Power Amplifier outputs a current to
flow in the voice coil, and the carriage
and coil assy are driven forward, loading
the heads.
HEAD LOADING OH 5 Head Loading will take place when Disk Pack
rotation has reached 3000 rpm. That implies
that the spinning of the disk creates a cushion
of air upon which the heads will fly.
During the Head Load, the Heads move forward
with the Head Load Springs riding on the
Cam Tower Ramps. This prevents the heads
from banging into the disks during a head
load.
As the heads move out over the disk surfaces,
the head load springs ride off the cam tower
ramps.
Then the heads will get close to the disk
surfaces until the force of head load springs
has reached an equilibrium with the force
of the opposing air.
If rotation speed drops below 3000 rpm, the
head load springs forces the heads down to
the disk surfaces because air cushion pressure
decreases.
Sufficient loss of speed causes the heads
to stop flying, and contact with disk surfaces
occur. This is called a HEAD CRASH and can
cause damage to both disk surfaces and heads.
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SMD AC/DC POWER DISTRIBUTION L, DE, I
3 …0f…
MECHANICAL OH 6 This gives an impression of location of
FUNCTIONS Disk Pack Rotation Mechanisms.
SMD I. Sec. 3.12-16.
SELFSTUDY ON OH 7 The AC Power System shows the circuit which
SMD CABLING comprises the Transformer T1 from which
DIAGRAMS 42VAC, 9.2VAC, and 20VAC is derived. Circuit
Breakers CB1 and CB2 are also shown.
SMD II. X Ref. 302.
OH 8 The Assy A1 shows the positions of Potmeters
in the circuit where +/-5V Adjustment are
made.
SMD III. X Ref. 322.
OH 9 The Assy A1 shows the positions of Fuses
F1 and F2 (to protect the +/-20V circuitry)
and Fuses F3 and F4 (to protect +/-42V circuitry)
SMD III. X Ref. 323.
DISCUSSION OH 10 The procedure of checking/adjusting plus
and
OF EXERCISES minus 5volt supplies is briefly explained.
OH 11 This will be the intro to a Groupwork coming
up.
SMD II. Sec. 2.63-64.
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SMD MECH. FUNCTIONS L/DE/I
1
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DATA STORAGE OH 1 The Data Storage Medium is a 5 disk Disk-Pack
MEDIUM which is portable and interchangeable. There
are six usable surfaces, each coated with
Iron Oxide Particles which can be magnetized
in a flux field.
5 of these surfaces can be used for Data
Storage. They are, therefore, referred to
as Data Surfaces.
The last one comprises prerecorded information
used for position info and various timing
signals. This surface is referred to as Servo
Surface.
SMD I. Sec. 1.6.
SERVO DISK OH 2 The information on servo surface is read
by
INFO the Servo head. The Position Feedback Circuits
generates signals used by position control
circuits to control the positioning of the
heads.
SMD I. Sec. 3.44-45.
SERVO DISK OH 3 A servo disk contains dibit patterns all
around the disk except in the Head Loading
Zone.
There is a servo zone consiting of:
823 servo tracks recorded as alternate Positive-ODD
and Negative-EVEN dibit Bands, an Outer Guard
band Zone consisting of 24 Positive - ODD
Dibit Bands and
an Inner Guard Band consisting of 36 Negative
- EVEN Dibit Bands.
All Bands are recorded adjacant to each other.
The Inner Guard band is also called Forward
End of Travel.
The Outer Guard Band is also called Reverse
End of Travel.
SMD I. Sec. 3.45-53.
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POSITION OH 4 In order to position the heads exactly on
the desired cylinder, the position feedback
circuits use the Dibit signal from the Servo
Head to generate a feedback signal for the
Position Control Circuits.
The circuits sense the type of Dibit, if
any, to determine whether the Servo Head
is in one of the Guard Bands
(Inner GB: NEG-EVEN/OUTER GB: POS-ODD)
or it is in the Servo Zone.
If the Servo Head is in one of the Guard
Bands (End of Travel), signals to position
control will return the Servo Head to the
Servo Zone.
SMD I. Sec. 3.51-54.
CYLINDER OH 5 The Cylinder Concept is the illustration
of
CONCEPT an imaginary cylinder. All heads including
the Servo Head are aligned vertically on
the actuator.
Therefore, when the Servo Head is positioned
over a certain track on the servo surface,
all Data Heads are also positioned over the
same Data Track on their Data Surface.
SMD I. Sec. 3.51.
ACTUATOR OH 6 When the Servo Head moves to a desired track
COMPONENTS all heads move at the same time as they are
all attached to the carriage.
SMD I. Sec 3.16-18.
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SMD MECH. FUNCTIONS L/DE/I
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DIRECT SEEK OH 7 A direct seek is a controlled seek from One
Track to Another one. Velocity Feed Back
Circuits control the Velocity of the Carriage
in order to have the shortest seek time without
having any overshoot.
A Velocity Transducer within the magnet senses
the velocity from induced EMF in the coil
and the amplitude of the signal varies with
the speed of the Carriage.
A direct seek is divided into two phases:
A Coarse Seek and a Fine Seek.
The Coarse phase is a seek over all the tracks
to go but the last half track of the seek.
Then the servo system is in Fine mode during
the last half track and while the heads are
tracking over the desired cylinder.
SMD I. Sec. 3.65-79.
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SMD OPERA. FUNCTIONS L/DE/I
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READ/WRITE
OPERATION OH 1 Information is recorded on and recovered
from the disk by the Read/Write Heads. There
are five Read/Write Heads, each having their
own data recording surface.
After having selected the Head over the disk
surface where data are to be read or written,
Read/Write operations can be performed.
SMD I 3.90.
OH 2 Data is written to the surface during disk
motion by reversing the current through the
windings of the recording Head.
This causes a flux field in the head gap
to magnetize the magnetic coating beneath
the head.
Change in polarity changes the direction
of the flux field. This flux change defines
a bit.
Data is read from the surface during disk
motion. The magnetic coating induces a flux
flow in the coil which generates a current
in the winding of the Read Head.
Each flux reversal in the magnetic surface
causes a current Polarity change which defines
a bit.
SMD I. 3.91-93.
READ/WRITE OH 3 When a head has been selected and the head
CIRCUITS is on the desired cylinder on the proper
place, a Read/Write operation can be performed.
During a write operation the write circuits
receive data from the Controller and records
it on the data surface.
During a Read operation the Read Circuits
recover data from the disk and transfer it
to the controller.
SMD I. 3.98.
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SMD OPERA. FUNCTIONS L/DE/I
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WRITE OH 4 Write operations are performed by the Write
CIRCUITS Circuits.
The Converter receives data from the Controller
and converts them into MFM data and compensate
for problems caused by variations in frequency.
The WRT Driver Circuits receive the compensated
data, and underwrite current control the
data are written onto the disk.
SMD I. Sec. 3.98-107.
READ OH 5 Read Operations are performed by the Read
CIRCUITS circuits.
The analog RD Data Detection Circuit Processes
the sensed signal from the RD/WRT Head and
forward the Analog data to the A/D-converter
to be converted into Digital MPM Read Data.
The RD PLO and data separator converts MFM-data
into NRZ-data.
SMD I. Sec. 3.107-118.
HEAD OH 6 The drive has five Read/Write Heads, but
SELECTION only
one can be selected to perform Read/Write
operation at a time.
Therefore the controller must command the
drive to select the head over the surface
where the data is to be read or written.
A combination of three bus bits decides which
head to do the performance. After being decoded
the head is enabled and can perform Read/Write
operations.
If more than one head is selected, a fault
is indicated, which prevents further drive
performance.
SMD I. Sec. 3.93.
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SMD OPERA. FUNCTIONS L/DE/I
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FAULT OH 7 Shows the position of Maintenance
LOGIC switches and indicators.
OH 8 Gives the description of Maintenance
switches and indicators.
OH 9 There are two categories of errors:
1) Errors which are indicated by a Fault
Latch.
2) Errors which are not indicated by a Fault
Latch.
When ever an error associated with a Fault
Indicator occurs, the Fault Latch is set
together with the individual Fault Latch
and the indicator lights.
This prevents the drive from further operations
being performed until the Error is corrected
and the Fault Latch reset.
This can be done by either:
1) Fault Switch on operators panel
2) Controller Fault Clear from Controller
3) Maintenance Fault Clear Switch on Fault
Card
4) Powering down the Unit
If Spindle speed drops below 3000 RPM, the
WRT circuits are disabled, and the write
Protect signal is sent to the Controller.
This also result in a emergency retract of
the heads.
SMD I. 3.118-120.
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STORAGE MODULE DRIVE EXERC
1
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This lesson is devoted to perform Storage
Module Drive Exercises.
Perform exercise according to STUDENT LABORATORY
GUIDE Section 5:3:4-6.
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MMD AC/DC POWER DISTRIBUTION L/DE/I
1
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CYLINDER OH 1 The Disks of the Mini Module Drive and the
CONCEPT Storage Module Drive comprise information
recorded on the surfaces.
To recover recorded data Read/Write heads
are used. They are all aligned vertically
on a carriage that is able to be moved by
a positioner.
On MMD two heads/surface.
On SMD one head/surface.
MMD I. Sec 3.48.
OH 2 The MMD Disk is formatted so that 5 data
surfaces each comprise two sets of Data Tracks.
The Servohead reads one set of servo tracks.
MMD I. Sec. 3.49-50.
Introduction
to POWER
DISTRIBUTION OH 3 The MINI MODULE DRIVE is divided into a
number of major areas, one of them being
POWER SYSTEM FUNCTIONS.
This area comprises Power Distribution of
AC-power and DC-power (Other areas will be
discussed throughout this course).
POWER FUNCTIONS describes how the drive provides
the voltages necessary for drive operation.
MMD I. Sec. 3.1-2.
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MMD AC/DC POWER DISTRIBUTION L/DE/I
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AC-POWER OH 4 The DRIVE POWER SUPPLY is powered from
DISTRIBUTION the Site Power AC-distribution.
The input AC-voltage is filtered and distributed
to the drive fans, the Motor Control Triacs
and the DC-Voltage Regulator Board.
The AC-power is protected from overload by
the CB1 Circuit Breaker.
The Fuse F1 is an overcurrent protective
device located on the outside of the power
supply.
The Fuses F2 - F5 are four overcurrent protective
devices located within the power supply.
The Thermostate S1 protects the Power Supply
from overheating.
MMD I. Sec 3.3-4.
DC-POWER The DC-Voltage Regulator Board receives
DISTRIBUTION its power from the secondary winding of the
T1 transformer.
The +/-24V AC from Trafo T1 is rectified
to an unregulated +/-24V DC for use in drive
operations like Motor control, Brake Control,
Head Positioning, and Retract.
OH 5 DC VOLT PART I & II show the circuit which
comprises the rectifier from which the
+/-24V DC is derived. Also shown is the
OH 6 circuit from which the regulated +/-5V is
derived
MMD II X Ref. 22-23.
OH 7 This shows the Power Supply with CB1, F1,
AC-Cable, outlets, and +/-5V ADJ.
MMD II. Sec. 2.15.
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MMD AC/DC POWER DISTRIBUTION L/DE/I
3
…0f…
POWER CABLING OH 8 This shows the Power Cabling to and from
the Power Supply. Also shown is the Logic
Cabling between Logic Chasis and R/W Motherboard.
MMD II. Sec. 2.40.
POWER CABLING DEMO Physical location of Power Supply and Various
Cables is shown on the MMD.
SELFSTUDY ON OH 9 OH 9 shows the Voltage Programming Plug P07
MMD CABLING OH 10 and the MMD Grounding Diagram.
DIAGRAMS OH 11
OH5, OH6, OH7, OH8 show the MMD Cabling
Diagrams.
The Student will use the manuals
and make a selfstudy on the Cabling and
Plugs in order to familiarize himself
with the MMD, what is located where, and
how
it is connected.
MMD II. X Ref. 11-12 + 412.
DISCUSSION OH 12 One exercise coming up later in this course
OF EXERCISES will need a little preparation. The
instructor will go through each step of exercise
EX1 and discuss with the student what to
perform, how to perform, and where (on the
drive) to perform the single steps in each
exercise.
MMD II. Sec. 2.13-15.
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MMD MECH. FUNCTIONS L/DE/I
1
…0f…
POWER ON OH 1 In order to initialize a power-up, the
SEQUENCE Circuit Breaker CB1 must be in its ON position.
The Power On Abbreviated Flowchart describes
what happens during a Power On Sequence.
Numbers in () Refer to X REF #'s on Diagrams.
The power-up sequence is under the control
of an initialization program under the direction
of the MPU.
MMD I. Sec. 3.6.
OH 2 Power-on Sequence Circuitry shows the start
drive signals at PIA-1. Together with the
flowchart, signals and sequence are explained.
MMD I. Sec. 3.8.
MECHANICAL OH 3 The Drive Motor is the device that rotates
FUNCTIONS the Disks. Disk rotation serves two purposes:
One is to enable the encoding of cylindrical
data,
and the other one is to create a cushion
of air on the disk surfaces to allow the
heads to move over the disk surfaces without
actually contacting them.
The Disk Motor is mounted on the frame assy.
MMD I. Sec. 3.13-14.
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MMD MECH. FUNCTIONS L/DE/I
2
…0f…
OH 4 A drive belt transfer motion from the drive
motor to disks which are mounted on a spindle.
The motor starts during the power on sequence
after the brake has been released. The Drive
motor/spindle accellerates until it reaches
3600 r/min.
OH 4 A Speed Transducer is mounted next to the
Spindle Pulley. The transducer generates
signals which are monitored by the drive
speed logic.
If spindel speed 3000 RPM, normal seek
and read/write operations can take place.
If spindel speed 3000 RPM, a Retract Operation
will occur.
MMD I. Sec. 3.15-17.
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MMD MECH. FUNCTIONS L/DE/I
3 …0f…
OH 3 Drive Motor temperature is monitored by the
Thermal Switch. If the motor overheats, the
thermal switch opens to remove power from
the motor and initiate a not up to speed
retract operation.
The drive motor cannot be restarted until
it cools. Then the thermal reset button must
be pushed to restart it.
MMD I. Sec. 3.13-14.
INTRODUCTION OH 6 The Drive positions the moveable heads over
the desired cylinder on the disk during a
seek operation.
The servo circuit takes care of the positioning
by means of prerecorded signals from the
servo disk.
The positioner is an actuator on which all
heads are mounted and aligned vertically.
All head moves together when the actuator
moves.
MMD I. Sec. 3.48.
OH 7 The 80MB Disk Format and Head Configuration
shows that the drive has five Data Recroding
Surfaces (with two Recording Zones per surface)
and 10 Recording Heads (one associated with
each data recording zone). Also one servo
surface and one servo head is present.
A Data Zone consists of Landing Zone, Behind
Home, and 823 Data Tracks.
SERVODISK A Servo Zone consists of a Landing Zone/Guard
Band 2, Guard Band 1, Servo Tracks (0-822),
and Inner Guard Band.
MMD I. Sec 3.49-51.
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MMD MECH. FUNCTIONS L/DE/I
3
…0f…
OH 8 The servo tracks, which are concentric bands
of tracks, comprise servo information in
the form of prerecorded signals. These signals
have a layout like bar magnets with north
and south poles.
The way the poles are arranged, determines
the type of servo track as either an "even"
track or an "odd" track.
All tracks between the Guard Bands are recorded
in alternate bands of even and odd tracks.
During disk rotation, the servo head reads
these magnetic changes.
The resultant signal of reading an even and
an odd track is called QUADBITS.
MMD I. Sec. 3.59-60.
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MMD OPERA. FUNCTIONS L/DE/I
1
…0f…
INTRODUCTION In order to perform Read/Write operations
on the Data Surface of Disks, o̲n̲e̲ read/write
OH 1 head must be involved.
As all heads are moving at the same time
to desired cylinder, one head to read/write
information on disk has to be selected by
the Head Selection Circuits.
The controller commands the Drive to select
the Head located over the Data Surface where
the Read/Write Data operation is to be performed.
MMD I. Sec. 3.91.
OH 1 The Read/Write Circuit Block Diagram shows
the principles of Recording and Recovering
Data on a magnetic Disk.
The Read/Write Heads (one selected by the
Head Select Circuits) perform the Read/Write
operation.
1) Write Circuits:
During a Write operation, data are received
from Controller and transferred to heads
and recorded on the Disk.
2) Read Circuits:
During a Read operation, recovered data
from the disk are received from the heads
and transferred to the controller.
MMD I. Sec. 3.99-100.
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MMD OPERA. FUNCTIONS L/DE/I
2
…0f…
WRITING/READING OH 2 In order to write data,
a current is
DATA passed through a read/write coil within the
recording head. This generates a magnetic
flux flow in the coil which creates a flux
field across a gap in the head.
The magnetic coating (Iron Oxide Particles)
is magnetized - all in same direction (like
bar magnets) - within the flux field.
It has one polarity.
To change the polarity, the flux field has
to be reversed, which means that the direction
of the current flow will have to be reversed.
The amount of oxide particles to be magnetized
depends on the flux field amplitude which
again is a function of the amount of current.
Data are written onto the disk by reversing
the current through the head in a certain
pattern while the disk is in motion.
One flux change defines one data bit.
Reading data is almost the opposite operation:
The disk rotation positions magnetized Iron
Oxide Particles underneath the head gab which
causes a magnetic flow in the coil. This
flow induces a current flow. Each flux reversal
generates a reversed current flow pulse.
These pulses represent data bits.
RECORDING OH 3 Actual recorded wareforms and timing are
TECHNIQUES slightly different from theoretical ones
due
to the nature of the electromechanical devices,
which do not operate perfect.
Write Irregularity is shown as an Actual
Recording compared to an Ideal Recording.
MMD I. Sec. 3.101-105..
OH 4 The Technique of reading the binary digits
recorded on disk involves a carefully
monitoring of the frequency of flux reversals.
The MMD uses the method of Modified Frequency
Modulation (MFM).
MMD I. Sec. 3.99-100.
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MMD OPERA. FUNCTIONS L/DE/I
3
…0f…
READ CIRCUIT OH 5 Read operations are initiated when the Analog
Read Data Detection Circuits are enabled.
The recorded data sensed by the head is received
as analog signals and processed into analog
data (MFM) to be used by the Analog to Digital
Converter.
The converter performs the change of analog
data into Digital Data (MFM), which are sent
to the Data Separator.
After the MFM data has been converted to
NRZ, these Read Data are sent to the Controller.
MMD I. Sec. 3.105-114.
WRITE CIRCUIT OH 6 Write operations are initiated when the
drive is allowed to start processing serial
NRZ data received from the controller.
The NRZ data is converted to MFM and compensated
for Peak Shift (which is an effect that degrades
read accuracy by distortion of waveform.
Electromechanical devices are not ideal).
The Write Driver receives the write data
(MFM) and produces the necessary amount of
current to be used in recording data on disk
by the head.
A Write Current Control Circuit serves the
purpose of reducing write current amplitude
proportional to the distance from Center.
Thus even numbered head writes with a reduced
current amplitude compared to odd numbered
heads. (Instructor: Why is that?)
MMD I. Sec. 3.114-119.
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MMD OPERA. FUNCTIONS L/DE/I
4
…0f…
FAULT CODES There are two categories of errors.
AND ERROR
CONDITIONS 1) Errors which occur during a Power-on sequence
and First Seek operation, and
2) Errors which occur after the drive has
become operational.
OH 7 If the error is operational, a Fault Latch
is set. This latch signal prevents any other
write operation and lights the Fault Indicator.
The PIA-2, which handles faults, stores the
Operational Fault Status from the fault latches
for input to the MPU.
Controlled by the MPU, the fault code display
is driven from the output of PIA-2.
MMD I. Sec. 3.119-121.
OH 8 Fault Code Card comprises Displays for fault
codes and count.
By operating S1 status is requested to the
MPU, which is interrupted. A MPU-program
now displays fault info consisting of type
of faults that have been detected and the
number of times.
By operating S2, all faults are cleared and
the drive is brought back into operation.
OH 9 This table shows:
- START-UP AND FIRST SEEK ERRORS
- OPERATIONAL ERRORS INDICATED BY FAULT
LATCH
- OPERATIONAL ERRRORS NOT INDICATED BY FAULT
LATCH
- SEEK ERRORS
MMD I. Sec. 3.121-126.
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MINI MODULE DRIVE EXERC SW, S, DI
1
…0f…
This lesson is devoted to:
Perform Mini Module Drive Exercises
Perform exercise according to STUDENT LABORATORY
GUIDE, Section 5:4:4-6.
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WEEKLY PROGRESS TEST T
1
…0f…
PROGRESS TEST S̲t̲a̲t̲e̲ ̲b̲e̲f̲o̲r̲e̲ ̲s̲t̲a̲r̲t̲:
Open book test.
Number of questions.
Time allowed: 45 min.
ANSWERS TEST Instructor corrects answers.
OH 4-5-6 Answers are presented and explained.
R̲e̲f̲e̲r̲e̲n̲c̲e̲s̲
TEST Q 1: Lesson 5:1:1
Q 2: Lesson 5:1:1
Q 3: Lesson 5:1:1, (5:2:1-3)
Q 4: Lesson 5:1:1
Q 5: Lesson 5:4:2
Q 6: Lesson 5:4:2
Q 7: Lesson 5:4:2
Q 8: Lesson 5:3:1, 5:4:2
Q 9: Lesson 5:3:1, 5:4:2
Q10: Lesson 5:3:3, 5:4:2
Q11: Lesson 5:4:3
Q12: Lesson 5:3:2
Q13: Lesson 5:3:1
Q14: Lesson 5:3:1
Q15: Lesson 5:2:1-3
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REVISION PERIOD I/DI/S/L/DE
1 …0f…
REVISION ON
THE TOPICS Answer Hard to understand topics
OF THIS WEEK sheets
Question- Refreshing topics
naires of
this week
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FIELD TEST UNIT EXERC …0f…
This lesson is devoted to:
Perform Field Test Unit Exercise.
Perform exercise according to STUDENT LABORATORY
GUIDE Section 5:5:4-6.
3074A 5.1.4
840618 1
STUDENT LABORATORY GUIDE
CAMPS
F̲L̲O̲P̲P̲Y̲ ̲D̲I̲S̲K̲ ̲D̲R̲I̲V̲E̲ ̲C̲O̲N̲T̲R̲O̲L̲L̲E̲R̲ ̲E̲X̲E̲R̲C̲I̲S̲E̲/̲…01……01…D̲I̲S̲K̲ ̲C̲O̲N̲T̲R̲O̲L̲L̲E̲R̲ ̲E̲X̲E̲R̲C̲I̲S̲E̲
Objectives: - Enable the student to use DAMU-commands
- To enable and disable controllers to/from I/O busses
and describe leds on controller front panel.
- To explain the result of a unitmapping on VDU-screen.
- To perform switch setting on controllers.
References: - SLM Sec. 4.392-410
- STB sec. 16.
- ^CR^ = RETURN key.
1 Power up or press MC on the MAP module.
2 Use the maintenance position and type the following
commands when the BIT MAP OK message appears on the
VDU screen and the DAMU promt is displayed:
ZP ^CR^
ZP1 ^CR^
UM1 ^CR^
3 Explain the display on the terminal
4 Type the following commands:
IR 1A[1 ^CR^
IR 1A25 ^CR^
UM1 ^CR^
5 Explain the display
3074A 5.1.4
840618 2
STUDENT LABORATORY GUIDE
CAMPS
6 Explain the info of the front panel indicators of the
two controllers.
7 Type the following commands:
IR 18[1 ^CR^
IR 1825 ^CR^
UM1 ^CR^
8 Explain the display
9 Explain the info of the front panel indicators of the
two controllers
10 Power down
11 Remove the two controllers from the Channel Unit
12 Perform switch setting on two spare controllers
13 Place the two spare controllers in the Channel Unit
14 Repeat step 1 to 8
3074A 5.1.5-6
840618 1
STUDENT LABORATORY GUIDE
CAMPS
F̲L̲O̲P̲P̲Y̲ ̲D̲I̲S̲K̲ ̲E̲X̲E̲R̲C̲I̲S̲E̲…01…(DAMU commands on 5:1:5-6, page 3)
OBJECTIVES: - Enable the student to access a specific sector on
the Floppy Disk to perform writing/reading by using
the RAM memory on board the Floppy Disk Controller.
- To replace a Floppy Disk Drive
REFERENCES: - STB Sec. 16
1 Power up or press MC on the MAP module.
2 Use the Maintenance position for the following after
the BIT MAP OK message has appeared on screen. Zet
Parity in the Processor Units and Channel Units.
3 Make a unit mapping.
4 Enable the Floppy Disk Controller.
5 Reset the RAM Pointer.
6 Write a sector to the RAM.
7 Seek a Track (ex TRACK 1B).
8 Write the data in RAM to a sector (ex SECTOR [B).
9 Seek TRACK [[.
3074A 5.1.5-6
840618
2
STUDENT LABORATORY GUIDE
CAMPS
10 Empty the RAM.
11 Read the RAM (what is the contents now?)
12 Seek the Track chosen in step 7.
13 Read the Sector chosen in step 8.
14 Read the RAM (was it the same data that you wrote to
it in step 6?)
15 Power down.
16 Replace Floppy Disk Drive #[ by spare Floppy Disk Drive.
17 Perform steps 1 to 5.
18 Perform steps 12 to 14 (was the data the same as in
step 14?)
3074A 5.1.5-6
840618
3
STUDENT LABORATORY GUIDE
CAMPS
^CR^ = RETURN Key
ENABLE CONTROLLER IR 1A[1 ^CR^
DRIVE READY?
(LOOK FOR LED IN DRIVE) OW 1[[1 [ ^CR^
RESET RAM POINTER OW 1[41 [ ^CR^
SEEK TRACK [B OW 1[[1 2[[B ^CR^
*) WRITE SECTOR 1F OW
1[[1
081F
^CR^
*) READ SECTOR 1C OW
1[[1
1[1C
^CR^
**) WRITE TO RAM OW 1[81+2[
B[[F ^CR^
**) READ FROM RAM IR 1[81+4[
^CR^
*) REMEMBER TO RESET RAMPOINTER!
**)REMEMBER TO POSITION RAM POINTER AT DESIRED PLACE:
POSITION THE FIRST HEXNUMBER BY OW 1[41 [ ^CR^
THEN READ UNTIL DESIRED POS BY IR 1[81+28 ^CR^
THEN WRITE BY OW 1[81+18 ^CR^
3074A 5:2:4-6
840618
1
STUDENT LABORATORY GUIDE
CAMPS
F̲I̲E̲L̲D̲ ̲T̲E̲S̲T̲ ̲U̲N̲I̲T̲ ̲E̲X̲E̲R̲C̲I̲S̲E̲
OBJECTIVES: - Enable the student to operate the Field
Test Unit to simulate the Disk Controller
Commands
- To describe the performance of the Disk
Drive and the commands used
REFERENCES: - Field Test Unit Manual sec. 1 & sec. 2
The performance of each of the following steps is thoroughly
described in the Field Test Unit Manual.
1 Make a checklist.
a) Power up initialization procedure
b) Drive selection procedure
c) Sector info procedure
d) Writing only on CE-cylinder procedure
e) Writing on all Cylinders procedure
(This list will be useful in the following)
Before proceeding: Consult your instructor and let
him check your list.
2 Power up the Field Test Unit.
3 Perform a Processor Test.
4 Perform a Lamp test.
5 Perform a Self Test (are all Indicators and Switches
working properly according to the manuals?)
6 Power down the Field Test Unit.
3074A 5:2:4-6
840618
2
STUDENT LABORATORY GUIDE
CAMPS
7 Connect the Field Test Unit to the Storage Module Drive.
NOTE: RED ORIENTATION MARKINGS DENOTES PIN 1, WHEN INSTALLING
CABLES INTO DRIVE.
RED ORIENTATION MARKINGS ARE TO THE RIGHT, WHEN
FACING FTU AND INSTALLING CABLES.
8 Power up the Field Test Unit and the Storage Module
Drive.
9 Perform a DIRECT SEEK (explain the result).
10 Mount a Disk Pack (the scratch pack!) on the Storage
Module Drive.
11 Perform a DIRECT SEEK (explain the result).
12 Perform a CONT SEEK (explain the result).
13 Perform a WRITE FORMAT (explain the result).
14 Perform a WRITE/READ FORMAT (explain the result).
15 Power down the Storage Module Drive and the Field Test
Unit.
16 Remove Disk Pack from SMD.
3074A 5:3:4-6
840618
1
STUDENT LABORATORY GUIDE
CAMPS
S̲T̲O̲R̲A̲G̲E̲ ̲M̲O̲D̲U̲L̲E̲ ̲D̲R̲I̲V̲E̲ ̲E̲X̲E̲R̲C̲I̲S̲E̲
OBJECTIVES: - Enable the student to understand the operation
of the Storage Module Drive
- To adjust the voltage levels within specifications
REFERENCES: - SMD Hardware Maintenance Manual, CPS/TCM/010
Sec. 2.63-64.
The performance of each of the following steps is thoroughly
described in Ref. Manual.
(also refer to FTU-Manual).
1 Remove Storage Module Drive from Slide Assy in Channel
Unit rack.
2 Place the Drive on a worktable and connect the FTU
to the SMD with proper cables.
3 Perform plus and minus 5 volt adjustment (2 card power
supply) according to the manual.
Did you obtain the same +̲ 5 V level specification as
outlined in the manual? (Adjust to above the limit
and beneath the limit)
What happened when the output was not within the specification?
4 Mount the Storage Module Drive in the Slide Assy in
Channel Unit rack.
5 Perform Disc Access from Maintenance-position.
3074A 5:4:4-6
840618
1
STUDENT LABORATORY GUIDE
CAMPS
M̲I̲N̲I̲ ̲M̲O̲D̲U̲L̲E̲ ̲D̲R̲I̲V̲E̲ ̲E̲X̲E̲R̲C̲I̲S̲E̲
OBJECTIVES: - Enable the student to understand the operation
of the Mini Module Drive.
- To adjust the voltage levels within specifications.
- To describe the principles in operating
the MMD.
REFERENCES: - CPS/TCM/009, Sec. 2.13-15.
The performance of the following steps is thoroughly
described in Ref. Manual.
(Also refer to FTU-Manual).
1 Remove Mini Module Drive from Slide Assy in Processor
Unit rack.
2 Place the Drive on a worktable. Remove SMD Top Cover
and connect the FTI to the MMD with proper cables.
3 Perform Plus and Minus 5 Volt Adjustment.
Adjust to above the specification outlined in the manual
and to below the limit.
What happened when the output was not within the specifications?
4 Perform READ/WRITE FORMAT on MMD.
5 Mount the Mini Module Drive in Slide Assy in Processor
Unit Rack.
…02…
PROGRESS TEST, Week 5 …02… 5:5:1 …02……0e…1…0f…
…02…
NAME: ̲ ̲ ̲ ̲ ̲ ̲ ̲ ̲ ̲ ̲ ̲ ̲ ̲ ̲ ̲ ̲ ̲ ̲ ̲ ̲ ̲ ̲ ̲ ̲ ̲ ̲ ̲ ̲ ̲ SCORE: ̲ ̲ ̲ ̲
̲ ̲ ̲ ̲ ̲ ̲
1. Besides the busswitching module the Hard Disk Controller
comprises two functionally independent modules.
Name these two modules and describe shortly their function.
1)
2)
2. After a power-on (No-Errors detected) the Disk Controller
does not respond to I/O Commands.
Name two possible causes for this.
1)
2)
3. How does the Disk Controller and Adaptor communicate/interface
with the Disk Drive? (Refer to cables and signals
flowing in these cables).
1)
2)
3074A/aml
…02…
PROGRESS TEST, Week 5 …02… 5:5:1 …02……0e…2…0f…
…02…
4. What is the purpose of the RAM-memory on the Floppy
Disk Controller, and how much data does it comprise?
(Hint: Refer to the Floppy Disk).
5. What does two Servo clockbits along with four Position
bits (the socalled "quadbits") represent?
6. What is the purpose of "Quadbits"?
7. What is a Landing Zone and what is a Guard Band?
Landing Zone:
Guard Band:
8. At what speed does the spindel motor revolve when
1) Loading/Unloading heads:
2) Running nominal speed:
9. What happens if the Drive Motor overheats?
3074A/aml
…02…
PROGRESS TEST, Week 5 …02… 5:5:1 …02……0e…3…0f…
…02…
10. What does "on track" condition mean?
11. In what way are MMD Diagnostic Faults displayed?
12. What does "Cylinder Concept" imply?
13. Why are the heads not riding o̲n̲ the surface of the
spinning Disks, and what makes the heads fly?
14. What is a Head Crash?
15. The Field Test Unit is used to maintain SMDs and MMDs.
Describe briefly how it operates.
(Hint: You should compare the FTU to a specific Module
in the CAMPS-system)
3074A/aml
…02…
ANSWERS …02… 5:5:1 …02……0e…1…0f…
PROGRESS TEST, Week 5
…02…
1. The Disk Controller comprises two modules:
1) An I/O module which is the Disk Controlling Device
and
2) A RAM module which is a Memory Device.
2. 1) The Disk Controller is not initialized. The
Disk Controller should be enabled to mainbus A
or B.
2) The I/O Module Address Switch has not been set
to the actual I/O address.
3. The Disk Controller communicates with the Disk
)Drive through two cables:
1) Cable A, through which Timing and Control signals
flow and
2) Cable B, through which Data stream and Clock
Signals flow.
4. The RAM memory is used for data transfer to and
from Disk and it comprises the amount of data for one
sector on Floppy Disk (128 bytes of RAM).
5. The Mini Module Drive contains a Servo Disk Surface
which comprises the SERVO BYTES which are used for
track accessing and timing.
6. The "Quadbits" is the part of the servo byte that
provides info to the Drive circuits whether an "on
track-condition" exists or not.
3074A/aml
…02…
ANSWERS …02… 5:5:1 …02……0e…2…0f…
PROGRESS TEST, Week 5
…02…
7. 1) The Landing Zone is the surface on disks where
the heads are packed during power off.
2) The Guard Band are the zones that tell the drive
circuits that the heads are outside the Data Tracks.
8. 1) Headloading/Unloading speed is 3000 rpm.
2) Nominal spindel speed is 3600 rpm.
9. If the Drive Motor should overheat, the Thermostate
S1 will break the AC power.
10. "On track" condition implies that odd and even servo
bits are of equal magnetude. This means that the head
is centered right between two servo bands which is
exactly on a datatrack.
11. On a Fault Code Display and on a Fault Indicator.
3074A/aml
…02…
ANSWERS …02… 5:5:1 …02……0e…3…0f…
PROGRESS TEST, Week 5
…02…
12. A "cylinder concept" means that all dataheads are
positioned over the same track on each data surface.
13. A cushion of air is created by means of the
spinning disk. This forces the heads off (upward/vertical
motion of heads( the disk.
14. A Head Crash is when the situation has occurred
that one or more heads have landed on the disk during
spindel rotation close to nominal speed.
15. The Field Test Unit is the portable suitcase
computer that simulates input/output control functions
of a disk storage controller. It is used to maintain
MMD & SMD.
3074A/aml
3074A 5:5:4-6
840618 1
STUDENT LABORATORY GUIDE
CAMPS
F̲I̲E̲L̲D̲ ̲T̲E̲S̲T̲ ̲U̲N̲I̲T̲ ̲E̲X̲E̲R̲C̲I̲S̲E̲
OBJECTIVES: - Enable the student to use the FTU as a controller
for the Disk Drive.
- To describe the various phases in a controlled
sec.
REFERENCES: - Field Test Unit Manual, sec. 2.
FTU Sec 2.
1 Connect the FTU to the SMD with proper cables.
2 Perform the exercise described on page 2 of this Lesson.
(Explain the result!!)
3 Perform flagging A BAD TRACK.
4 Connect an oscilloscope to the FTU: Probe on the ON
CYLINDER Pin and ground connected to the GROUND pin
(referring to STANDARD INTERFACE Test Points).
5 Perform seeks with various INCREMENTS from Track [.
6 Note the SEEK-TIME obtained on the scope and put the
results into a system of co-ordinates with seek-time
as a function of Number of Track to seek.
7 Explain the shape of the graph
(why is the graph not a straight line?)
(Explain the result).
3074A 5:5:4-6
840618
2
STUDENT LABORATORY GUIDE
CAMPS
RUNNING LIGHT!
DATA ENTRY: SEEK INCREMENT
ENTER: 8000
HIT: LOAD
DATA ENTRY: STATUS BYTES
RD/WRT SELECT: ACCESS ONLY
ACCESS SELECT: SEQ FWD or SEQ FWD or SEQ REV
OBSERVE: OUTPUT CONTROL BUS BITS 0-9
3074A 2:2:6
840618 1
STUDENT LABORATORY GUIDE
CAMPS
E̲X̲E̲R̲C̲I̲S̲E̲…01……01…D̲I̲S̲K̲ ̲P̲A̲C̲K̲ ̲H̲A̲N̲D̲L̲I̲N̲G̲
OBJECTIVE: Enable the students to handle a disk pack and the Storage
Module Drive (SMD) in a proper way. The Students will
also be enabled to install and remove a disk. pack.
REFERENCE: CPS/REM/003 SMD HARDWARE REFERENCE MANUAL
Sec. 2.7-8.
The disk drive will not operate until a disk pack had
been installed. This installation consists of removing
the pack from its storage canister and locking it in
place in the drive. To do this, perform the following
steps:
1. Make sure that the blower system has been operating
for at least two minutes with the pack access cover
closed. This allows time for dust to be expelled
from the shroud area and blower system. If the
blower motor is not running, ask the instructor
to turn on the drive circuit breakers.
2. Open the pack access cover.
3. Check to see that the heads are retracted. If
the heads are not fully retracted, call the instructor.
DO NOT push on the heads or attempt to install
the pack with the heads extended.
4. Examine the shroud area of the drive for foreign
objects prior to mounting the pack.
3074A 2:2:3
840618 2
STUDENT LABORATORY GUIDE
CAMPS
P̲R̲E̲P̲A̲R̲A̲T̲I̲O̲N̲ ̲O̲F̲ ̲T̲H̲E̲ ̲M̲S̲P̲'̲S̲
OBJECTIVE: Enable the students to prepare a MSP which is connected
to the TDX system.
REFERENCE: CPS/OPM/009 CAMPS MSP SITE USER/MAINTENANCE MANUAL
Sec. 2.1.
Go through steps 1-4. After each step, wait for the
instructor's permission to continue.
1. Perform Paper Installation
2. Perform Self-Test. If the test results in an error,
contact the instructor.
3. Turn the key into "OFF" position.
4. check that the 2 red LEDs in the LTUX, to which
the MSP is connected, do not light. If they do,
contact the instructor.
3074A 2:3:4-6
840618 3
STUDENT LABORATORY GUIDE
CAMPS
E̲X̲E̲R̲C̲I̲S̲E̲…01……01…R̲E̲C̲E̲I̲V̲E̲ ̲M̲E̲S̲S̲A̲G̲E̲
OBJECTIVE: Enable the students to receive messages from a queue
by using a terminal and to use the CAMPS USER MANUAL.
REFERENCE: CPS/OPM/001 CAMPS USER MANUAL, section 3.2.3.
Go through the exercise. If any error appears, contact
the instructor.
Follow the instruction below and CAMPS USER MANUAL.
Use "TABLE OF CONTENTS" as guide.
- Prepare a Comment. Use Laboratory Guide No. 2:3:2-3
p.l.
- Take a small break.
- If you have anything in the "DISP" queue, continue
the exercise, else contact the instructor.
- Use the RECEIVE MESSAGE function to receive the
messages in the "DISP" queue.
- Do you remember which Program Function Key you
have to use, when you will receive the next message
in the queue, or leave the Receive mode. You have
heard about it.
3074A 2:3:4-6
840618 4
STUDENT LABORATORY GUIDE
CAMPS
R̲E̲L̲E̲A̲S̲E̲ ̲M̲E̲S̲S̲A̲G̲E̲
OBJECTIVE: Enable the students to release a message, use the Response
message function, and the Display outgoing message
status function.
REFERENCE: The CAMPS USER MANUAL, sections 3.3.3, 3.4.4, and 3.2.9.
Go through the exercise. If any error appears, contact
the instructor.
follow the instruction below and CAMPS USER MANUAL.
Use "TABLE OF CONTENTS" as guide.
- Use terminal "SEC" or Terminal "OPB" in this exercise.
- Release all the messages which are in the queue
at the terminal.
- Do not use "NO or "DEFER" when you release the
message.
- Do you remember the password. If not, see Laboratory
Guide, section 2:3:2-3, page 2.
- Go back to you own terminal.
- Finally, use the RESPONSE MESSAGE function and
the DISPLAY OUTGOING MESSAGE STATUS function.
3074A 2:3:4-6
840618 5
STUDENT LABORATORY GUIDE
CAMPS
C̲O̲N̲T̲I̲N̲U̲E̲ ̲M̲E̲S̲S̲A̲G̲E̲ ̲P̲R̲E̲P̲A̲R̲A̲T̲I̲O̲N̲
OBJECTIVE: Enable the students to use the continue preparation
facility.
REFERENCE: The CAMPS USER MANUAL, section 3.2.4 and the SLG, section
2:3:4-6, page 1.
Go through the exercise. If any error appears, contact
the instructor.
Follow the instruction below and CAMPS USER MANUAL.
Use "TABLE OF CONTENTS" as guide.
- Start preparing a new message by your own or use
Laboratory Guide section 2:3:4-6, page 1 as guide.
- When you have finished preparing the first VDU
screen layout, suspend the Message Preparation
by using Program Function Key No. ?.
- Do you remember the Item Ref ID? If not, start
from the beginning of this exercise, else continue.
- Continue Message Preparation.
- Defer the message when you have finished preparing
the message.
- Do you remember the new Item Ref ID? If not, go
two steps back, else continue.
- Continue Message Preparation.
- Send the message for Release.
