NAME

       fsck.ocfs2 - Check an OCFS2 file system.

SYNOPSIS

       fsck.ocfs2 [ -pafFGnuvVy ] [ -b superblock block ] [ -B block size ] device

DESCRIPTION

       fsck.ocfs2 is used to check an OCFS2 file system.

       device  is  the file where the file system is stored (e.g. /dev/sda1).  It will almost always be a device
       file but a regular file will work as well.

OPTIONS

       -a     This option does the same thing as the -p option.  It  is  provided  for  backwards  compatibility
              only: it is suggested that people use the -p option whenever possible.

       -b superblock block
              Normally,  fsck.ocfs2  will  read  the superblock from the first block of the device.  This option
              specifies an alternate block that the superblock should be read from.  (Use  -r  instead  of  this
              option.)

       -B blocksize
              The  block  size,  specified  in bytes, can range from 512 to 4096.  A value of 0, the default, is
              used to indicate that the blocksize should be automatically detected.

       -D     Optimize directories in filesystem. This  option  causes  fsck.ocfs2  to  coalesce  the  directory
              entries in order to improve the filesystem performance.

       -f     Force checking even if the file system is clean.

       -F     By default fsck.ocfs2 will check with the cluster services to ensure that the volume is not in-use
              (mounted) on any node in the cluster before proceeding.  -F skips this check and  should  only  be
              used when it can be guaranteed that the volume is not mounted on any node in the cluster. WARNING:
              If the cluster check is disabled and the volume is mounted on  one  or  more  nodes,  file  system
              corruption is very likely. If unsure, do not use this option.

       -G     Usually  fsck.ocfs2  will  silently  assume  inodes  whose  generation  number  does not match the
              generation number of the super block are unused inodes.  This option causes fsck.ocfs2 to ask  the
              user if these inodes should in fact be marked unused.

       -n     Give  the  'no'  answer to all questions that fsck will ask.  This guarantees that the file system
              will not be modified and the device will be opened read-only.  The output of fsck.ocfs2 with  this
              option can be redirected to produce a record of a file system's faults.

       -p     Automatically   repair   ("preen")  the  file  system.   This  option  will  cause  fsck.ocfs2  to
              automatically fix any problem that can be safely corrected without human intervention.   If  there
              are  problems that require intervention, the descriptions will be printed and fsck.ocfs2 will exit
              with the value 4 logically or'd into the exit code.  (See the EXIT CODE section.)  This option  is
              normally used by the system's boot scripts.

       -P     Show progress.

       -r backup-number
              mkfs.ocfs2  makes  upto 6 backup copies of the superblock at offsets 1G, 4G, 16G, 64G, 256G and 1T
              depending on the size of the volume.  Use this option to specify the backup, 1 thru 6, to  use  to
              recover the superblock.

       -t     Show  I/O statistics. If this option is specified twice, it shows the statistics on a pass by pass
              basis.

       -y     Give the 'yes' answer to all questions that fsck will ask.   This  will  repair  all  faults  that
              fsck.ocfs2  finds  but will not give the operator a chance to intervene if fsck.ocfs2 decides that
              it wants to drastically repair the file system.

       -v     This option causes fsck.ocfs2 to produce a very large amount of debugging output.

       -V     Print version information and exit.

EXIT CODE

       The exit code returned by fsck.ocfs2 is the sum of the following conditions:
            0    - No errors
            1    - File system errors corrected
            2    - File system errors corrected, system should
                   be rebooted
            4    - File system errors left uncorrected
            8    - Operational error
            16   - Usage or syntax error
            32   - fsck.ocfs2 canceled by user request
            128  - Shared library error

SEE ALSO

       debugfs.ocfs2(8)  fsck.ocfs2.checks(8)   mkfs.ocfs2(8)   mount.ocfs2(8)   mounted.ocfs2(8)   o2cluster(8)
       o2image(8) o2info(1) tunefs.ocfs2(8)

AUTHORS

       Oracle  Corporation.   This  man  page  entry  derives  some text, especially the exit code summary, from
       e2fsck(8) by Theodore Y. Ts'o <tytso@mit.edu>.

COPYRIGHT

       Copyright © 2004, 2012 Oracle. All rights reserved.