fsck.hfsplus(8)
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.
SEE ALSO
fsck(8)
BUGS
fsck.hfs is not able to fix some inconsistencies that it detects.
HISTORY
The fsck.hfs command appeared in Mac OS X Server 1.0 .
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