gfs_fsck
NAME
gfs_fsck - Offline GFS file system checker
SYNOPSIS
gfs_fsck
[OPTION]... DEVICE
WARNING
All GFS nodes must have the GFS filesystem unmounted before running
gfs_fsck. Failure to unmount all nodes may result in filesystem corruption.
DESCRIPTION
gfs_fsck 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
gfs_fsck 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.
-n
No to all questions.
By specifying this option, gfs_fsck 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, gfs_fsck will not prompt before making
changes.
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