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
filesystems 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,
filesystemio_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 © 2004, 2010 Oracle. All rights reserved.