Linux in a Nutshell, Fourth Edition

Name

badblocks

Synopsis

                  badblocks [options] device 
                  block-count
               

System administration command. Search device for bad blocks. You must specify the number of blocks on the device (block-count).

Options

-b blocksize

Expect blocksize-byte blocks.

-c blocksize

Test blocksize-byte blocks at a time. Default is 16.

-f

Force a read/write or nondestructive write test on a mounted device. Use only when /etc/mtab incorrectly reports a device as mounted.

-i file

Skip test of known bad blocks listed in file.

-n

Perform a nondestructive test by writing to each block and then reading back from it while preserving data.

-o file

Direct output to file.

-p number

Repeat search of device until no new bad blocks have been found in number passes. Default is 0.

-v

Verbose mode.

-w

Test by writing to each block and then reading back from it.