A/UX® System Administrator's Reference Sections 1M, 7, and 8

adblk(IM) badblk(IM)
NAME
badblk - set or update bad block information
SYNOPSIS
badblk [-r] /dev/rdsk/c?d?s? [blkno ... ]
DESCRIPTION
badblk sets or updates bad block infonnation for disk partitions.
badblk first attempts to alter a bad block by hardware sparing.
In the event that hardware sparing fails and the device supports alternate
bad blocking, badblk will attempt to alternate block the
bad block. Hardware sparing may fail if the device does not support
hardware sparing or if the device's capacity for hardware
sparing has been exceeded.
If you invoke badblk without specifying block numbers, it will
search the whole device for bad blocks and print the block
numbers of any that are found.
FLAG OPTIONS
-r When this option is specified, badblk will not attempt to
block any bad blocks, but instead will report those that are
found.
blkno
One or more block numbers separated by blanks.
EXAMPLES
badOlk /dev/rdsk/cOdOs31
does a full read-verify on the whole disk associated with controller
zero, drive zero. Note that the raw device must be specified.
badblk /dev/rdsk/cOdOsO
does a full read-verify on partition zero (usually the root partition)
of the disk associated with controller zero, drive zero.
NOTES
badblk uses very simple tests to determine whether or not a
block is bad.
The alternate block map information can be accessed and
modified through the dp(IM) utility.
The badblk command does not work on floppy disks.
February, 1990
Revision C
1