NAME
fsck.gfs - Offline GFS file system checker
SYNOPSIS
fsck.gfs [OPTION]... DEVICE
WARNING
All GFS nodes must have the GFS filesystem unmounted before running
fsck.gfs. Failure to unmount all nodes may result in filesystem
corruption.
DESCRIPTION
fsck.gfs will check that the GFS 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.gfs can do. If important file
system structures are destroyed, such that the checker can not
determine what the repairs should be, reparations could fail.
GFS is a journaled file system, and as such should be able to repair
damages to the file system on its own. However, faulty hardware has
the ability to write incomplete blocks to a file system thereby causing
corruption that GFS can not fix. The first step to ensuring a healthy
file system is the selection of reliable hardware (i.e. storage systems
that will write complete blocks - even in the event of power failure).
OPTIONS
-h Help.
This prints out the proper command line usage syntax.
-q Quiet.
-n No to all questions.
By specifying this option, fsck.gfs will only show the changes
that would be made, not make any changes to the filesystem.
-V Version.
Print out the current version name.
-v Verbose operation.
Print more information while running.
-y Yes to all questions.
By specifying this option, fsck.gfs will not prompt before
making changes.
fsck.gfs(8)