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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  pro‐
	      vided  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	block‐
	      size should be automatically detected.

       -D     Optimize	 directories   in   filesystem.	  This	option	causes
	      fsck.ocfs2 to coalesce the directory entries in order to improve
	      the filesystem 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 corruption 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 sys‐
	      tem'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 off‐
	      sets 1G, 4G, 16G, 64G, 256G and 1T depending on the size of  the
	      volume.  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 condi‐
       tions:
	    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 © 2004, 2010 Oracle. All rights reserved.

Version 1.8.0			September 2010			 fsck.ocfs2(8)

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