GPFS: Administration and Programming Reference - IRA Home

mmumount Command
Name
mmumount – Unmounts GPFS file systems on one or more nodes in the cluster.
Synopsis
{mmumount | mmunmount} {Device | MountPoint | all} [-f ] [-a | -N {Node[,Node...] | NodeFile |
NodeClass}]
Description
Another name for the mmumount command is the mmunmount command. Either name can be used.
The mmumount command unmounts a previously mounted GPFS file system on one or more nodes in
the cluster. If no nodes are specified, the file systems are unmounted only on the node from which the
command was issued. The file system can be specified using its device name or the mount point where it
is currently mounted.
When all is specified in place of a file system name, all GPFS file systems are unmounted. This also
includes remote GPFS file systems to which this cluster has access.
Parameters
Device | all
The device name of the file system to be unmounted. File system names need not be
fully-qualified. fs0 is just as acceptable as /dev/fs0. Specify all to unmount all GPFS file systems
that are owned by this cluster, as well as all remote file systems to which this cluster has access.
This must be the first parameter.
MountPoint
The location where the GPFS file system to be unmounted is currently mounted.
Options
-a Unmount the file system on all nodes in the GPFS cluster.
-f Forces the unmount to take place even though the file system may be still in use.
Use this flag with extreme caution. Using this flag may cause outstanding write operations to be
lost. Because of this, forcing an unmount can cause data integrity failures and should be used with
caution.
-N {Node[,Node...] | NodeFile | NodeClass}
Specifies the nodes on which the file system is to be unmounted. For general information on how
to specify node names, see “Specifying nodes as input to GPFS commands” on page 4.
Exit status
This command does not support a NodeClass of mount.
0 Successful completion.
nonzero A failure has occurred.
272 GPFS: Administration and Programming Reference