fsck.ocfs2(8)							OCFS2 Manual Pages						     fsck.ocfs2(8)

NAME

       fsck.ocfs2 - Check an OCFS2 file system.

SYNOPSIS

       fsck.ocfs2 [ -pafFGnuvVy ] [ -b superblock block ] [ -B block size ] device

DESCRIPTION

       fsck.ocfs2 is used to check an OCFS2 file system.

       device  is  the file where the file system is stored (e.g. /dev/sda1).  It will almost always be a device file but a regular file will work
       as well.

OPTIONS

       -a     This option does the same thing as the -p option.  It is provided for backwards compatibility only: it is suggested that people  use
	      the -p option whenever possible.

       -b superblock block
	      Normally, fsck.ocfs2 will read the superblock from the first block of the device.  This option specifies an alternate block that the
	      superblock should be read from. (Use -r instead of this option.)

       -B blocksize
	      The block size, specified in bytes, can range from 512 to 4096.  A value of 0, the default, is used to indicate that  the  blocksize
	      should be automatically detected.

       -D     Optimize directories in filesystem. This option causes fsck.ocfs2 to coalesce the directory entries in order to improve the filesys-
	      tem performance.

       -f     Force checking even if the file system is clean.

       -F     By default fsck.ocfs2 will check with the cluster services to ensure that the volume is not in-use (mounted)  on	any  node  in  the
	      cluster  before proceeding.  -F skips this check and should only be used when it can be guaranteed that the volume is not mounted on
	      any node in the cluster. WARNING: If the cluster check is disabled and the volume is mounted on one or more nodes, file system  cor-
	      ruption is very likely. If unsure, do not use this option.

       -G     Usually  fsck.ocfs2  will silently assume inodes whose generation number does not match the generation number of the super block are
	      unused inodes.  This option causes fsck.ocfs2 to ask the user if these inodes should in fact be marked unused.

       -n     Give the 'no' answer to all questions that fsck will ask.  This guarantees that the file system will not be modified and the  device
	      will  be	opened	read-only.   The  output  of  fsck.ocfs2 with this option can be redirected to produce a record of a file system's
	      faults.

       -p     Automatically repair ("preen") the file system.  This option will cause fsck.ocfs2 to automatically fix  any  problem  that  can	be
	      safely  corrected without human intervention.  If there are problems that require intervention, the descriptions will be printed and
	      fsck.ocfs2 will exit with the value 4 logically or'd into the exit code.	(See the EXIT CODE section.)  This option is normally used
	      by the system's boot scripts.

       -r backup-number
	      mkfs.ocfs2  makes  upto 6 backup copies of the superblock at offsets 1G, 4G, 16G, 64G, 256G and 1T depending on the size of the vol-
	      ume.  Use this option to specify the backup, 1 thru 6, to use to recover the superblock.

       -y     Give the 'yes' answer to all questions that fsck will ask.  This will repair all faults that fsck.ocfs2 finds but will not give  the
	      operator a chance to intervene if fsck.ocfs2 decides that it wants to drastically repair the file system.

       -v     This option causes fsck.ocfs2 to produce a very large amount of debugging output.

       -V     Print version information and exit.

EXIT CODE

       The exit code returned by fsck.ocfs2 is the sum of the following conditions:
	    0	 - No errors
	    1	 - File system errors corrected
	    2	 - File system errors corrected, system should
		   be rebooted
	    4	 - File system errors left uncorrected
	    8	 - Operational error
	    16	 - Usage or syntax error
	    32	 - fsck.ocfs2 canceled by user request
	    128  - Shared library error

SEE ALSO

       mkfs.ocfs2(8) debugfs.ocfs2(8) tunefs.ocfs2(8) mounted.ocfs2(8) ocfs2console(8) o2cb(7)

AUTHORS

       Oracle  Corporation.   This  man  page  entry  derives  some  text,  especially	the  exit code summary, from e2fsck(8) by Theodore Y. Ts'o
       <tytso@mit.edu>.

COPYRIGHT

       Copyright (C) 2004, 2010 Oracle. All rights reserved.

Version 1.6.4							  September 2010						     fsck.ocfs2(8)