12-02-2015
Yeah... The command was new for me, too. And unfortunatly it will not work on the older ALOM systems. The Guide I posted are for CMT systems. So there needs to be another way to fix the hardware in your system!
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LEARN ABOUT OPENDARWIN
fsck_hfs
FSCK_HFS(8) BSD System Manager's Manual FSCK_HFS(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] [-dfg] [-m mode] 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) run from /etc/rc.boot during automatic
reboot, 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:
-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 it's output strings in GUI format. This option is used when another application with a graphical
user interface (like Mac OS X Disk Utility) is envoking the fsck_hfs tool.
-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.
Because of inconsistencies between the block device and the buffer cache, the raw device should always be used.
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 .
Mac OS X November 21, 2002 Mac OS X