Man page or keyword search:   man All Sections 1 - General Commands 2 - System Calls 3 - Subroutines, Functions 4 - Special Files 5 - File Formats 6 - Games and Screensavers 7 - Macros and Conventions 8 - Maintenence Commands 9 - Kernel Interface New Commands Server 4.4BSD AIX Alpinelinux Archlinux Aros BSDOS BSDi Bifrost CentOS Cygwin Darwin Debian DigitalUNIX DragonFly ElementaryOS Fedora FreeBSD Gentoo GhostBSD HP-UX Haiku Hurd IRIX Inferno JazzOS Kali Knoppix LinuxMint MacOSX Mageia Mandriva Manjaro Minix MirBSD NeXTSTEP NetBSD OPENSTEP OSF1 OpenBSD OpenDarwin OpenIndiana OpenMandriva OpenServer OpenSuSE OpenVMS Oracle PC-BSD Peanut Pidora Plan9 QNX Raspbian RedHat Scientific Slackware SmartOS Solaris SuSE SunOS Syllable Tru64 UNIXv7 Ubuntu Ultrix UnixWare Xenix YellowDog aLinux   33470 pages apropos Keyword Search (all sections) Output format html ascii pdf view pdf save postscript

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

NAME
       tunefs.ocfs2 - Change OCFS2 file system parameters.

SYNOPSIS
       tunefs.ocfs2  [--cloned-volume[=new-label]  [--fs-features=list-of-fea‐
       tures] [-J journal-options] [-L volume-label] [-N number-of-node-slots]
       [-Q  query-format] [-ipqnSUvVy] [--backup-super] [--list-sparse] device
       [blocks-count]

DESCRIPTION
       tunefs.ocfs2 is used to adjust OCFS2 file system	 parameters  on	 disk.
       The  tool  expects  the	cluster	 to  be online as it needs to take the
       appropriate cluster locks to write safely to disk.

OPTIONS
       --cloned-volume[=new-label]
	      Change the volume UUID (auto-generated) and the label,  if  pro‐
	      vided,  of  a cloned OCFS2 volume.  This option does not perform
	      volume cloning. It only changes the UUID and label on  a	cloned
	      volume so that it can be mounted on the node that has the origi‐
	      nal volume mounted.

       --fs-features=[no]sparse...
	      Turn specific file system features on or off. tunefs.ocfs2  will
	      attempt  to  enable  or  disable	the  feature list provided. To
	      enable a feature, include it in the list. To disable a  feature,
	      prepend no to the name. For a list of feature names, see the man
	      page for mkfs.ocfs2.

       -J, --journal-options options
	      Modify the journal using options specified on the	 command-line.
	      Journal  options	are  comma separated, and may take an argument
	      using the equals ('=') sign. For a list of possible options, see
	      the man page for mkfs.ocfs2.

       -L, --label volume-label
	      Change  the  volume label of the file system. Limit the label to
	      under 64 bytes.

       -N, --node-slots number-of-node-slots
	      Valid number ranges from 1 to 255.  This	number	specifies  the
	      maximum  number  of nodes that can concurrently mount the parti‐
	      tion. Use this to increase or decrease the number of node slots.
	      One reason to decrease could be to release the space consumed by
	      the journals for those slots.

       -S, --volume-size
	      Grow the size of the OCFS2 file system. If blocks-count  is  not
	      specified,  tunefs.ocfs2	extends the volume to the current size
	      of the device.

       -Q, --query query-format
	      Query the file system for its attributes like block size, label,
	      etc.  Query  formats  are	 modified  versions  of	 the  standard
	      printf(3) formatting. The format is made up  of  static  strings
	      (which  may  include  standard C character escapes for newlines,
	      tabs, and other special characters) and printf(3)	 type  format‐
	      ters. The list of type specifiers is as follows:

		   B	Block size in bytes

		   T	Cluster size in bytes

		   N	Number of node slots

		   R	Root directory block number

		   Y	System directory block number

		   P	First cluster group block number

		   V	Volume label

		   U	Volume uuid

		   M	Compat flags

		   H	Incompat flags

		   O	RO Compat flags

       -q, --quiet
	      Quiet mode.

       -U, --uuid-reset[=new-uuid]
	      Set  the	volume UUID for the file system. If not provided, will
	      auto generate a new UUID. The format of the provided UUID should
	      be	      178BDC83D50241EF94EB474A677D498B		    or
	      178BDC83-D502-41EF-94EB-474A677D498B.

       -v, --verbose
	      Verbose mode.

       -V, --version
	      Show version and exit.

       -y, --yes
	      Always answer Yes in interactive command line.

       -n, --no
	      Always answer No in interactive command line.

       --backup-super
	      Backs up the superblock to fixed offsets (1G, 4G, 16G, 64G, 256G
	      and  1T)	on disk. This option is useful for users to backup the
	      superblock on volumes that the user either explicitly disallowed
	      while  formatting,  or,  used  a version of mkfs.ocfs2 (1.2.2 or
	      older) that did not provide this facility.

       --list-sparse
	      Lists the files having holes. This option is  useful  when  dis‐
	      abling the sparse feature.

       --update-cluster-stack
	      Updating	on-disk cluster information to match the running clus‐
	      ter.

       blocks-count
	      During resize, tunefs.ocfs2 automatically determines the size of
	      the given device and grows the file system such that it uses all
	      of the available space on the  device.  This  optional  argument
	      specifies	 that  the  file  system should be extended to consume
	      only the given number of file system blocks on the device.

EXAMPLES
       [root@node1 ~]# tunefs.ocfs2 -Q "UUID = %U\nNumSlots = %N\n" /dev/sda1
       UUID = CBB8D5E0C169497C8B52A0FD555C7A3E
       NumSlots = 4

SEE ALSO
       mkfs.ocfs2(8) fsck.ocfs2(8) debugfs.ocfs2(8) mounted.ocfs2(8) ocfs2con‐
       sole(8) o2cb(7)

AUTHORS
       Oracle Corporation

COPYRIGHT
       Copyright © 2004, 2010 Oracle. All rights reserved.

Version 1.8.0			September 2010		       tunefs.ocfs2(8)

Vote for polarhome