Ubuntu Manpage: fsck.ocfs2 - Check an OCFS2 file system.

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 up to 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

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.