Zenith Z-100 Series, Руководство пользователя

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page 18
WINCHESTER SUPPLEMENT
The VERIFY Utility
The VERIFY utility enables you to verify the integrity of your
Winchester disk. However, the tests performed by the system
are not "destructive." That is, they will not destroy the data
that is recorded on your disk.
Several things could cause a sector to "go bad" during normal
operation of your system. They include subjecting the Com-
puter system to a physical shock (most common cause of
sector failure), power failure during the middle of a disk opera-
tion (unlikely), or electronic component failure (very rare).
When a power failure causes a sector to go bad, you may
be able to recover the use of that sector by reformatting the
partition, just as you would reformat a floppy disk. However,
you will want to use the BACKUP utility before you do this.
See the discussion on BACKUP and RESTORE found later
in this supplement.
When a bad sector is located by the VERIFY utility, its location
will be stored in memory. At the end of the test, those sectors
that are found to be bad are added to the bad sector table
that was established by the PREP utility. However, the bad
sector(s) located by VERIFY will not be "locked out" until you
run your Z-DOS or CP/M-85 FORMAT program and reformat
the partition.
One advantage of VERIFY is that you can use the utility to
check your disk if you suspect that you have one or more
bad sectors. If none are found, the system will let you know,
and you can continue to use your programs without having
to go through the BACKUP and RESTORE processes de-
scribed later in this supplement.