Commodore A 2091-40 - Page 54

5-18 The A2091 Installation Software Disk
5.3.4 Bad Blocks
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nder Head
Add Bad B. )
Bad Block]
s mapped out b
The Bad Blocks screen allows you to keep a list of any blocks on the hard disk
that might develop read/write errors. The computer will use this list during initialization
to avoid using these areas. Most SCSI hard disks handle bad block errors internally.
The
bad
blocks
listed
on
this
screen
are
errors
that
are
not
handled
by
the
hard
disk. Bad blocks are handled most efficiently when the errors reported by Verify
Data on Drive are recorded internally by the hard disk. The hard disk will record
the location of the bad block, and will not use that block
The list shows the location of the bad blocks by cylinder, head, bytes from index,
and sector. Note that the system will list a range tor the approximate number of
Bytes from Index, and you will only be able to list one error per sector. Once a
sector has an error, the entire sector will be marked as bad. If you scroll a selected
block off the screen, it will become unselected.
This displays the number of bad blocks recorded
and mapped out by the hard disk, These bad blocks
will not be displayed on the Bad Block Entry list.
To add a new block to the list, click on this box. A
smaller screen will open, requesting the location of
the bad block. Click on each area and type in the
Cylinder, Head, and Bytes from Index or Sector
of the block. Click on OK to add this block to the list,
or Cancel to delete it.