Installation guide

File
Specifies the file from which to get information.
The gfs_tool command provides additional action flags (options) not listed in this section. For
more information about other gfs_tool flags, refer to the gfs_tool man page.
Examples
This example reports extended file system usage about file system /gfs.
gfs_tool df /gfs
This example reports extended file status about file /gfs/datafile.
gfs_tool stat /gfs/datafile
12. Repairing a File System
When nodes fail with the file system mounted, file-system journaling allows fast recovery.
However, if a storage device loses power or is physically disconnected, file-system corruption
may occur. (Journaling cannot be used to recover from storage subsystem failures.) When that
type of corruption occurs, you can recover the GFS file system by using the gfs_fsck command.
The gfs_fsck command must only be run on a file system that is unmounted from all nodes.
Note
The gfs_fsck command has changed from previous releases of Red Hat GFS in
the following ways:
• You can no longer set the interactive mode with Ctrl-C. Pressing Ctrl-C now
cancels the gfs_fsck command. Do not press Ctrl-C unless you want to cancel
the command.
• You can increase the level of verbosity by using the -v flag. Adding a second -v
flag increases the level again.
• You can decrease the level of verbosity by using the -q flag. Adding a second -
q flag decreases the level again.
• The -n option opens a file system as read-only and answers no to any queries
automatically. The option provides a way of trying the command to reveal er-
rors without actually allowing the gfs_fsck command to take effect.
Refer to the gfs_fsck man page, gfs_fsck(8), for additional information about oth-
er command options.
Examples
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