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Length: 4096 (0x1000)
Types: TextFile
Names: »D102«
└─⟦2520239fd⟧ Bits:30005867/disk13.imd Dokumenter (RCSL m.m.)
└─⟦this⟧ »D102«
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RC8244/45/47
Disc Storage
Modules
RC8244: 33 Mbytes Disc Storage Module
RC8245: 66 Mbytes Disc Storage Module
RC8247: 248 Mbytes Disc Storage Module
. INTERCHANGEABLE DISC PACKS
. FORMATTED DISC PACKS
. SEEK OVERLAP CAPABILITY
. LOW ACOUSTIC NOISE LEVEL
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GENERAL
The RC8244/45/47 Disc Storage Modules are random access mass
storage devices. The storage medium is a stack of magnetic coated
discs with a protective cover plate in each end of the stack. The
RC8244/45/47 has 33, 66, 248 Mbytes (8-bit bytes) available for
data. The devices are free standing and they can be connected to
RC8000 as well as to RC3600.
CHARACTERISTICS
The RC8244 and RC8245 use disc packs with 6 magnetic coated
surfaces. Of these 6 surfaces one is used for positioning
purposes and 5 for data storage. The RC8247 uses disc packs with
20 magnetic coated surfaces. Of these 20 surfaces one is used for
positioning purposes and 19 for data storage. All units have one
read/write head per data storage surface and one read head for
the positioning surface.
The average access time - latency and positioning - is 38 ms.
Seek overlap capability, channel program control, error detection
and correction, and automatic positioning check are standard
features.
The RC8244/45/47 Disc Storage Modules are connected to RC8000 via
the RC8201 Disc Storage Channel or to RC3600 via the RC3789 Disc
Storage Channel. Any combination of up to 4 of the RC8244/45/47
Disc Storage Modules and the RC8230/33 Fixed Media Disc Drives
can be daisy-chained via a single RC8201/RC3789 Disc Storage
Channel - except RC8233 of which only one is allowed when using
the head per track feature.
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S_P_E_C_I_F_I_C_A_T_I_O_N_S_ RC8244 RC8245 RC8247
Capacity (8-bit bytes): 33 Mbytes 66 Mbytes 248 Mbytes
No. of cylinders: 411 823 823
No. of surfaces: 5 5 19
Bit density: 4038 bits/inch - outer track
6038 bits/inch - inner track
Record mode: MFM
Transfer rate: 1.2 Mbytes/sec.
Average latency: 8.33 ms
Head positioning: 7 ms - adjacent tracks
30 ms - average
55 ms - outer to inner track
Power requirements: 220 VAC 220 VAC
50 Hz 50 Hz
700 W (running) 1300 W (running)
Temperature, amb.: 10-32 C (50-90 F)
Humidity, rel.: 40-70%, non-condensing
Heat dissipation: 2500 kJ/h 4700 kJ/h
(600 kcal/h) (1120kcal/h)
(2380 BTU/h) (4420 BTU/h)
Mounting: Free standing
DIMENSIONS
Height: 92 cm (36.2 in) 92 cm (36.2 in)
Width: 56 cm (22 in) 59 cm (23.2 in)
Depth: 92 cm (36.2 in) 92 cm (36.2 in)
Weight: 150 kg (330 lb) 250 kg (550 lb)
RCSL 42-i1756
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