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Presents historical artifacts from the history of:

Rational R1000/400 DFS Tapes

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artifacts from Datamuseum.dk's BitArchive.

See our Wiki for more about Rational R1000/400 DFS Tapes

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⟦35db9e11b⟧ HLP, TextFile

    Length: 1296 (0x510)
    Types: HLP, TextFile
    Names: »CHECKDISK.HLP«

Derivation

└─⟦24d56d853⟧ Bits:30000744 8mm tape, Rational 1000, DFS, D_12_6_5 SEQ293
    └─ ⟦this⟧ »CHECKDISK.HLP« 
└─⟦9031b0687⟧ Bits:30000407 8mm tape, Rational 1000, DFS, D_12_7_3
    └─ ⟦this⟧ »CHECKDISK.HLP« 

TextFile

CHECKDISK

The CHECKDISK program performs a non-destructive, fast, read-only
surface analysis of a formated, labeled disk.  CHECKDISK will avoid
previously detected bad blocks on a labeled disk, reporting only
errors which are not known.

Run the CHECKDISK program by typing:
    X CHECKDISK

The CHECKDISK program will ask for the disk unit number to check.
The disk must have been previously formatted and labeled with the
RECOVERY program.  Next the program will ask for the number of
passes desired.  Normally a single pass is sufficient but for
internal or testing purposes several passes may be desired.  The
program will then ask if you want error information displayed for
all defects or only previously undetected defects.  Normally only
previously undetected error information is desired but at times
all information is useful.

Once the program begins it will display the current cylinder number
constantly and print a pass counter at the conclusion of each pass.
The time required for a pass is dependant on the disk but may be
calculated as follows:

    ((C*H*S)/16)/R seconds

    where:
    C = number of cylinders
    H = number of heads
    S = number of sectors
    R = spindle revolutions per minute

    Fujitsu 2351 (EAGLE) example:
    ((842*20*48)/16)/3961 = 12.75 minutes