GPFS: Administration and Programming Reference - IRA Home

mmdelfs Command
Name
mmdelfs – Removes a GPFS file system.
Synopsis
mmdelfs Device [-p]
Description
The mmdelfs command removes all the structures for the specified file system from the nodes in the
cluster.
Before you can delete a file system using the mmdelfs command, you must unmount it on all nodes.
Results
Upon successful completion of the mmdelfs command, these tasks are completed on all nodes:
v Deletes the character device entry from /dev.
v Removes the mount point directory where the file system had been mounted.
Parameters
Device
Options
The device name of the file system to be removed. File system names need not be fully-qualified.
fs0 is as acceptable as /dev/fs0.
This must be the first parameter.
-p Indicates that the disks are permanently damaged and the file system information should be
removed from the GPFS cluster data even if the disks cannot be marked as available.
Exit status
0 Successful completion.
nonzero A failure has occurred.
Security
You must have root authority to run the mmdelfs command.
You may issue the mmdelfs command from any node in the GPFS cluster.
When using the rcp and rsh commands for remote communication, a properly configured .rhosts file must
exist in the root user’s home directory on each node in the GPFS cluster. If you have designated the use
of a different remote communication program on either the mmcrcluster or the mmchcluster command,
you must ensure:
1. Proper authorization is granted to all nodes in the GPFS cluster.
2. The nodes in the GPFS cluster can communicate without the use of a password, and without any
extraneous messages.
Chapter 8. GPFS commands 157