GPFS: Administration and Programming Reference - IRA Home

mmumount fs1
Unmounting a file system on multiple nodes
To unmount file system fs1 on all nodes in the GPFS cluster, issue this command:
mmumount fs1 -a
To unmount a file system only on a specific set of nodes, use the -N flag of the mmumount command.
Note: When using GPFS file systems, you are not required to use the GPFS mmmount or mmumount
commands. The operating system mount and umount (or unmount) commands also work.
Deleting a file system
Before deleting a file system, unmount it on all nodes. See “Unmounting a file system” on page 14.
Specify the file system to be deleted on the mmdelfs command. For example, to delete the file system
fs1, enter:
mmdelfs fs1
The system displays information similar to:
mmdelfs: 6027-1366 Marking the disks as available
GPFS: 6027-573 All data on following disks of fs1 will be destroyed:
gpfs9nsd
gpfs13nsd
gpfs11nsd
gpfs12nsd
GPFS: 6027-574 Completed deletion of file system fs1.
mmdelfs: 6027-1371 Propagating the changes to all affected nodes.
This is an asynchronous process.
See the “mmdelfs Command” on page 157 for complete usage information. See the mmdelnsd command
for removing the NSD definitions after deleting the file system.
Determining which nodes have a file system mounted
The mmlsmount command is used to determine which nodes have a given file system mounted. The
name and IP address of each node that has the file system mounted is displayed. This command can be
used for all file systems, all remotely mounted file systems, or file systems mounted on nodes of certain
clusters.
Note that the mmlsmount command reports file systems that are in use at the time the command is
issued. A file system is considered to be in use if it is explicitly mounted with the mount or mmmount
command or if it is mounted internally for the purposes of running some other GPFS command. For
example, when you run the mmrestripefs command, the file system will be internally mounted for the
duration of the command. If mmlsmount is issued in the interim, the file system will be reported as being
in use by the mmlsmount command but, unless it is explicitly mounted, will not show up in the output of
the mount or df commands.
This is an example of a mmlsmount -L command for a locally mounted file system named fs1:
File system fs1 is mounted on 3 nodes:
199.14.58.79 k164n05 cluster1.kgn.ibm.com
199.14.68.69 k164n04 cluster1.kgn.ibm.com
199.14.102.58 k5n57 cluster2.kgn.ibm.com
Chapter 3. Managing file systems 15