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Maintenance and Service Guide 4-23
Addendum 108431-001 (11-88) to
Manual No. 108033-003
NOTE: An Unconditional Format should be
performed only if you are sure that
tracks marked bad on the fixed disk drive
are not actually bad. Good tracks may be
marked bad as a result of using a
defective fixed disk drive controller or
controller cable.
You must perform a Surface Analysis
after an Unconditional Format to identify
any additional bad tracks that may exist
on the fixed disk drive.
Run the Fixed Disk Drive test to verify that the
fixed disk drive and the fixed disk drive control-
ler (if applicable) are functioning properly.
Surface Analysis
The Surface Analysis selection performs multiple
write/read/compares on each track of the disk in
search of more unusable tracks. It formats tracks
to be unusable when errors are found.
Change Interleave
The Change Interleave selection permits you
to change the interleave factor of the fixed disk
drive. You must run either the Conditional or
Unconditional Format to enable the new inter-
leave factor.
CAUTION
Changing the interleave factor can drastically
reduce the performance of the system. The
interleave factor is preset to achieve maxi-
mum efficiency from the computer.
Do not choose this selection unless you are
required to do so, either by a software pro-
gram or by an operating system other than
MS-DOS. Changing the interleave factor
requires that the drive be reformatted to
function properly.
Display Current Interleave
The Display Current Interleave selection tests
the fixed disk drive and reports the current inter-
leave setting.