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gfs_fsck.8
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.\" Copyright (C) Sistina Software, Inc. 1997-2003 All rights reserved.
.\" Copyright (C) 2004 Red Hat, Inc. All rights reserved.
.TH gfs_fsck 8
.SH NAME
gfs_fsck - Offline GFS file system checker
.SH SYNOPSIS
.B gfs_fsck
[\fIOPTION\fR]... \fIDEVICE\fR
.SH WARNING
All GFS nodes \fImust\fP have the GFS filesystem unmounted before running
gfs_fsck. Failure to unmount all nodes may result in filesystem corruption.
.SH 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).
.SH OPTIONS
.TP
\fB-h\fP
Help.
This prints out the proper command line usage syntax.
.TP
\fB-q\fP
Quiet.
.TP
\fB-n\fP
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.
.TP
\fB-V\fP
Version.
Print out the current version name.
.TP
\fB-v\fP
Verbose operation.
Print more information while running.
.TP
\fB-y\fP
Yes to all questions.
By specifying this option, gfs_fsck will not prompt before making
changes.
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