badblk(1M)                                             badblk(1M)



NAME
     badblk - sets or updates bad block information

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

ARGUMENTS
     blkno
          Specifies one or more block numbers separated by
          blanks.  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.

     /dev/rdsk/c?d?s?
          Specifies controller, drive, and slice numbers,
          respectively.  Replace ? with the appropriate numbers.

     -r   Does not attempt to block any bad blocks, but instead
          will report those that are found.

DESCRIPTION
     badblk sets or updates bad block information for disk
     partitions.  The badblk command 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.

EXAMPLES
     The command:

        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.  The command:

        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
     The badblk command 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.




January 1992                                                    1

badblk(1M)                                             badblk(1M)



     The badblk command does not work on floppy disks.

FILES
     /usr/bin/badblk
          Executable file

SEE ALSO
     dp(1M)

     altblk(4) in A/UX Programmer's Reference













































2                                                    January 1992