fsck.gfs2 - offline GFS and GFS2 file system checker
fsck.gfs2 [
options]
device
All computers
must have the filesystem unmounted before running
fsck.gfs2. Failure to unmount from all nodes in a cluster will likely result
in filesystem corruption.
fsck.gfs2 will check that the GFS or GFS2 file system on a device is
structurally valid. It should not be run on a mounted file system. If file
system corruption is detected, it will attempt to repair the file system.
There is a limit to what fsck.gfs2 can do. If important file system structures
are destroyed, such that the checker cannot determine what the repairs should
be, reparations could fail.
Other file system checkers will not check the file system if it is
"clean" (i.e. unmounted since the last use). With gfs2, storage may
be shared among several nodes in a cluster, and therefore problems may have
been introduced on a different computer. Therefore, fsck.gfs2 will always
check the file system unless the -p (preen) option is used, in which case it
follows special rules (see below).
fsck.gfs2 will log a message to the system log on start and exit to aid
debugging and administration.
- -a
- Same as the -p (preen) option.
- -f
- Force checking even if the file system seems clean.
- -h
- Help.
This prints out the proper command line usage syntax.
- -q
- Quiet.
- -n
- No to all questions. By specifying this option, fsck.gfs2
will only show the changes that would be made, but not make any changes to
the filesystem.
This option may not be used with the -y or -p/-a
options.
- -p
- Automatically repair ("preen") the file system if
it is dirty and safe to do so, otherwise exit.
If the file system has locking protocol lock_nolock, it is considered
a non-shared storage device and it is considered safe. If the locking
protocol is lock_dlm and -a or -p was specified, the check
is considered unsafe as it cannot be determined whether the device is
mounted by other nodes in the cluster. In this case a warning is given if
any damage or dirty journals are found. The file system should then be
unmounted from all nodes in the cluster and fsck.gfs2 should be run
manually without the -a or -p options.
This option may not be used with the -n or -y options.
- -V
- Print out the program version information.
- -v
- Verbose operation.
Print more information while running.
- -y
- Yes to all questions. By specifying this option, fsck.gfs2
will not prompt before making changes.
This option may not be used with the -n or -p/-a
options.
gfs2(5),
gfs2_jadd(8),
gfs2_grow(8)