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mount.ocfs2(8) [suse man page]

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

NAME

       mount.ocfs2 -  mount an OCFS2 filesystem

SYNOPSIS

       mount.ocfs2 [-vn] [-o options] device dir

DESCRIPTION

       mount.ocfs2 mounts an OCFS2 filesystem at dir. It is usually invoked indirectly by the mount(8) command when using the -t ocfs2 option.

OPTIONS

       _netdev
	      The  filesystem resides on a device that requires network access (used to prevent the system from attempting to mount these filesys-
	      tems until the network has been enabled on the system). mount.ocfs2 transparently appends this option during mount.  However,  users
	      mounting	the  volume  via  /etc/fstab  must explicitly specify this mount option to delay the system from mounting the volume until
	      after the network has been enabled.

       atime_quantum=nrsec
	      The file system will not update atime unless this number of seconds has passed since the last update. Set to zero to  always  update
	      atime. It defaults to 60 secs.

       relatime
	      The file system only update atime if the previous atime is older than mtime or ctime.

       noatime
	      The file system will not update access time.

       acl / noacl
	      Enables / disables POSIX ACLs (Access Control Lists) support.

       user_xattr / nouser_xattr
	      Enables / disables Extended User Attributes.

       commit=nrsec
	      Sync all data and metadata every nrsec seconds. The default value is 5 seconds.  Zero means default.

       data=ordered / data=writeback
	      Specifies the handling of file data during metadata journalling.

		   ordered
			  This	is the default mode. All data is forced directly out to the main file system prior to its metadata being committed
			  to the journal.

		   writeback
			  Data	ordering is not preserved - data may be written into the main file system after its metadata has been committed to
			  the journal. This is rumored to be the highest-throughput option. While it guarantees internal file system integrity, it
			  can allow old data to appear in files after a crash and journal recovery.

       datavolume
	      This mount option has been deprecated in OCFS2 1.6. It has been used in the past (OCFS2 1.2 and OCFS2  1.4),  to	force  the  Oracle
	      RDBMS  to  issue direct IOs to the hosted data files, control files, redo logs, archive logs, voting disk, cluster registry, etc. It
	      has been deprecated because it is no longer required. Oracle RDBMS  users  should  instead  use  the  init.ora  parameter,  filesys-
	      temio_options, to enable direct IOs.

       errors=remount-ro / errors=panic
	      Define  the  behavior  when  an  error  is encountered. (Either remount the file system read-only, or panic and halt the system.) By
	      default, the file system is remounted read only.

       localflocks
	      This disables cluster-aware flock(2).

       intr / nointr
	      The default is intr that allows signals to interrupt cluster operations.	nointr disables signals during cluster operations.

       ro     Mount the file system read-only.

       rw     Mount the file system read-write.

SEE ALSO

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

AUTHORS

       Oracle Corporation

COPYRIGHT

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

Version 1.4.3							   February 2010						    mount.ocfs2(8)

Check Out this Related Man Page

o2info(1)							OCFS2 Manual Pages							 o2info(1)

NAME

       o2info - Dump OCFS2 file system information on disk.

SYNOPSIS

       o2info [-C|--cluster-coherent] [--fs-features] [--volinfo] [--mkfs] <device or file>

DESCRIPTION

       o2info  is designed to be an information tool, to display OCFS2 file system information on disk. Its main goal on one hand, is to provide a
       tool to display fs info in a comprehensive way and providing the information which may be missing in debugfs.ocfs and tunefs.ocfs2 such	as
       global  bitmap  free  space  fragmentation  and free inode info for each slot, on the other hand, it also aims to become a info tool(not an
       administration one), which therefore allows all users who may have no read privilege on the underlying device to use the utility. In  prac-
       tice, 'o2info /path/to/file/on/ocfs2/vol' use a new OCFS2_IOC_INFO ioctl to get info from fs for a mounted case. For a privileged user(e.g,
       root), the same info however, can also be accessed by 'o2info /dev/sdxN' to direcly manipulate the raw device.

OPTIONS

       -C, --cluster-coherent
	      Enable cluster (in)coherency for mounted case, means it will attempt to acquire a global PR lock when querying info from	a  cluster
	      filesystem, which may degrade the performance, default is none cluster-coherency.

       --fs-features
	      List all compat, incompat and ro-compat fs features on OCFS2 filesystem.

       --volinfo
	      Dump basic volume information, such as blocksize, clustersize, volume label and UUID etc.

       --mkfs Dump  an	original  format  of  mkfs.ocfs's  arguments,  importantly,  which can be used directly as a fresh mkfs retry: #mkfs.ocfs2
	      "$(o2info --mkfs /dev/name/or/path/of/file)" /dev/sdaX

       -V, --version
	      Show version and exit.

       -h, --help
	      Display help and exit.

EXAMPLES

       [oracle@node1 ~]# o2info --volinfo /storage/testfile	 # For none-privileged users.
       [root@node1 ~]# o2info --volinfo /dev/sda1
	      Label: ocfs2-volume
	       UUID: 976D8E630B3A4F1F95497311A92901FC
	 Block Size: 4096
       Cluster Size: 4096
	 Node Slots: 4
	   Features: backup-super strict-journal-super sparse inline-data xattr
	   Features: unwritten

SEE ALSO

       debugfs.ocfs2(8) tunefs.ocfs2(8)

AUTHORS

       Oracle Corporation

COPYRIGHT

       Copyright (C) 2010 Oracle. All rights reserved.

Version 1.6.4							   October 2010 							 o2info(1)
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