mmdelfs command

Removes a GPFS™ file system.

Synopsis

mmdelfs Device [-p]

Availability

Available on all IBM Spectrum Scale™ editions.

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:

Deletes the character device entry from /dev.
Removes the mount point directory where the file system had been mounted.

Parameters

Device: 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.

The node on which the command is issued must be able to execute remote shell commands on any other node in the cluster without the use of a password and without producing any extraneous messages. For more information, see Requirements for administering a GPFS file system.

Examples

To delete file system fs0, issue this command:

mmdelfs fs0

The system displays information like the following:

GPFS: 6027-573 All data on the following disks of fs0 will be destroyed:
    gpfs9nsd
    gpfs10nsd
    gpfs15nsd
    gpfs17nsd
GPFS: 6027-574 Completed deletion of file system fs0.
mmdelfs: 6027-1371 Propagating the cluster configuration data to all
  affected nodes.  This is an asynchronous process.

Location

/usr/lpp/mmfs/bin