mount.ocfs2 man page on Oracle
[printable version]
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
filesystems until the network has been enabled on the system).
mount.ocfs2 transparently appends this option during mount. How‐
ever, 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.
noatime
The file system will not update access time.
relatime
The file system only update atime if the previous atime is older
than mtime or ctime.
strictatime,atime_quantum=nrsec
The file system will always perform atime updates, but the mini‐
mum update interval is specified by atime_quantum. Atime_quantum
defaults to 60 secs, set it to zero to always update atime.
These two options need work together.
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 writ‐
ten 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 sys‐
tem.) 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.
Version 1.8.0 September 2010 mount.ocfs2(8)
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