System information

For more information about dumping and restoring XFS file systems, refer to man xfsd ump and man
xfsresto re.
8.8. Ot her XFS File Syst em Ut ilit ies
Red Hat Enterprise Linux 6 also features other utilities for managing XFS file systems:
xf s_f sr
Used to defragment mounted XFS file systems. When invoked with no arguments, xfs_fsr
defragments all regular files in all mounted XFS file systems. This utility also allows users to
suspend a defragmentation at a specified time and resume from where it left off later.
In addition, xfs_fsr also allows the defragmentation of only one file, as in xfs_fsr
/path/to/file. Red Hat advises against periodically defragmenting an entire file system,
as this is normally not warranted.
xf s_b map
Prints the map of disk blocks used by files in an XFS filesystem. This map lists each extent
used by a specified file, as well as regions in the file with no corresponding blocks (that is,
holes).
xf s_in f o
Prints XFS file system information.
xf s_ad min
Changes the parameters of an XFS file system. The xfs_ad mi n utility can only modify
parameters of unmounted devices or file systems.
xf s_co p y
Copies the contents of an entire XFS file system to one or more targets in parallel.
The following utilities are also useful in debugging and analyzing XFS file systems:
xf s_met ad u mp
Copies XFS file system metadata to a file. The xfs_metad ump utility should only be used to
copy unmounted, read-only, or frozen/suspended file systems; otherwise, generated dumps
could be corrupted or inconsistent.
xf s_md rest o re
Restores an XFS metadump image (generated using xfs_metad ump) to a file system
image.
xf s_d b
Debugs an XFS file system.
For more information about these utilities, refer to their respective man pages.
Simple Mode for xfsrest ore
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