badblk(1M)                                             badblk(1M)



     NAME
          badblk - set or update bad block information

     SYNOPSIS
          badblk [-r] /dev/rdsk/c?d?s?  [blkno...]

     DESCRIPTION
          badblk sets or updates bad block information for disk parti-
          tions.  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 ex-
          ceeded.

          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
             badblk /dev/rdsk/c0d0s31

          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/c0d0s0

          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(1M) utility.

          The badblk command does not work on floppy disks.






     April, 1990                                                     1

     badblk(1M)                                             badblk(1M)



     FILES
          /usr/bin/badblk

     SEE ALSO
          dp(1M), altblk(4).


















































     2                                                     April, 1990