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Mac OS X Tiger in a Nutshell by Jason McIntosh, Chuck Toporek, Chris Stone, Andy Lester

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Name

fsck

Synopsis

fsck [-l num_procs] [-b block_num] [-m mode] [-c { 0 | 1 | 2 | 3 }]
[-p | -n | -y] device...

Performs consistency checks of UFS volumes, and attempts to fix any inconsistencies found.

Options

-b

Specify an alternate super block for the filesystem.

-c

Convert the filesystem to the specified version level. See the fsck manpage for details.

-f

Force a check, even if the filesystem is clean.

-l

Limit the number of parallel fsck processes. Defaults to the number of disks.

-m

Specify the permissions of the lost+found directory, where files that have become detached from their place in the directory hierarchy due to filesystem corruption can be located. The argument is an octal mode, as described in the chmod manpage. The default is 1777.

-n

Automatically answer "no" whenever fsck asks to resolve an inconsistency.

-p

Run in preening mode, in which only purely innocuous inconsistencies are resolved.

-q

Quick check to see if filesystem was unmounted properly.

-y

Automatically answer "yes" whenever fsck asks to resolve an inconsistency.

device

The volume's device filename, e.g.,/dev/disk1s2.

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