Section: Maintenance Commands (8)Local indexUp BSD mandoc
Mac OS X
NAME
fsck.hfs
- HFS file system consistency check
SYNOPSIS
fsck.hfs
-q
[-df
]
special ... fsck.hfs
-p
[-df
]
special ... fsck.hfs
[-n | y | r
]
[-dfgl
]
[-m mode
]
[-c size
]
special ...
DESCRIPTION
The
fsck.hfs
utility verifies and repairs standard HFS and HFS+ file systems.
The first form of
fsck.hfs
quickly checks the specified file systems to determine whether
they were cleanly unmounted.
The second form of
fsck.hfs
preens the specified file systems.
It is normally started by
fsck(8)
during systen boot, when a HFS file system is detected.
When preening file systems,
fsck.hfs
will fix common inconsistencies for file systems that were not
unmounted cleanly.
If more serious problems are found,
fsck.hfs
does not try to fix them, indicates that it was not
successful, and exits.
The third form of
fsck.hfs
checks the specified file systems and tries to repair all
detected inconsistencies.
If no options are specified
fsck.hfs
will always check and attempt to fix the specified file systems.
The options are as follows:
-c size
Specify the
size
of the cache used by
fsck.hfs
internally. Bigger
size
can result in better performance but can result in deadlock when
used with
-l
option. Size can be specified as a decimal, octal, or
hexadecimal number. If the number ends with a ``k'', ``m'',
or ``g'', the number is multiplied by 1024 (1K), 1048576 (1M),
or 1073741824 (1G), respectively.
-d
Display debugging information.
This option may provide useful information when
fsck.hfs
cannot repair a damaged file system.
-f
When used with the
-p
option, force
fsck.hfs
to check `clean' file systems, otherwise it means force
fsck.hfs
to check and repair journaled HFS+ file systems.
-g
Causes
fsck.hfs
to generate its output strings in GUI format.
This option is used when another application with a graphical user interface
(like Mac OS X Disk Utility) is invoking the
fsck.hfs
tool.
-l
Lock down the file system and perform a test-only check.
This makes it possible to check a file system that is currently mounted,
although no repairs can be made.
-m mode
Mode is an octal number that will be used to set the permissions for the
lost+found directory when it is created.
The lost+found directory is only created when a volume is repaired and orphaned
files or directories are detected.
fsck.hfs
places orphaned files and directories into the lost+found directory (located
at the root of the volume).
The default mode is 01777.
-p
Preen the specified file systems.
-q
Causes
fsck.hfs
to quickly check whether the volume was unmounted cleanly.
If the volume was unmounted cleanly, then the exit status is 0.
If the volume was not unmounted cleanly, then the exit status will be non-zero.
In either case, a message is printed to standard output describing whether the
volume was clean or dirty.
-y
Always attempt to repair any damage that is found.
-n
Never attempt to repair any damage that is found.
-r
Rebuild the catalog file on the specified file system.
This option currently will only work if there is enough contiguous space on the
specified file system for a new catalog file and if there is no damage
to the leaf nodes in the existing catalog file.