Mac OS X Tiger in a Nutshell

Name

fsck_hfs

Synopsis

fsck_hfs -u
fsck_hfs [-d] [-f] [-r] { -q | -p | [-n | -y] } device...

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

Options

-d

Enable debugging output.

-f

Force check even if the volume is marked as clean.

-l

Lock and check the volume without writing. This allows checks on mounted volumes.

-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_hfs asks to resolve an inconsistency.

-p

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

-q

Check the filesystem but don’t resolve any inconsistencies. Return filesystem status of clean, dirty, or failure to standard error.

-r

Cause a rebuild of the volume’s catalog btree to occur.

-u

Print a usage statement to standard output.

-y

Automatically answer “yes” whenever fsck_hfs asks to resolve an inconsistency.

device

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