Red Hat GFS 6.0 -, Administrator'S Manual

Page: 107 / 192

Chapter 9. Managing GFS 93
Option Description
-o
acl
Allows manipulating file ACLs. If a file system is
mounted without the
-o
acl
mount option, users are
allowed to view ACLs (with
getfacl
), but are not
allowed to set them (with
setfacl
).
hostdata= nodename
LOCK_GULM file systems use this information to set
the local node name, overriding the usual selection of
node name from
uname -n
.
lockproto= LockModuleName
Allows the user to specify which locking protocol to
use with the file system. If
LockModuleName
is not
specified, the locking protocol name is read from the
file system superblock.
locktable= LockTableName
Allows the user to specify which locking table to use
with the file system.
upgrade
Upgrade the on-disk format of the file system so that
it can be used by newer versions of GFS.
ignore_local_fs
Caution: This option should not be used
when GFS file systems are shared.
Forces GFS to treat the file system as a multihost file
system. By default, using LOCK_NOLOCK
automatically turns on the
localcaching
and
localflocks
flags.
localcaching
Caution: This option should not be used
when GFS file systems are shared.
Tells GFS that it is running as a local file system. GFS
can then turn on selected optimization capabilities
that are not available when running in cluster mode.
The
localcaching
flag is automatically turned on
by LOCK_NOLOCK.
localflocks
Caution: This option should not be used
when GFS file systems are shared.
Tells GFS to let the VFS (virtual file system) layer do
all flock and fcntl. The
localflocks
flag is
automatically turned on by LOCK_NOLOCK.
Table 9-2. GFS-Specific Mount Options
9.3. Unmounting a File System
The GFS file system can be unmounted the same way as any Linux file system.
Note
The
umount
command is a Linux system command. Information about this command can be found in
the Linux
umount
command man pages.