Quantum 3.5.2 manual Moving a Metadata/ Journal Stripe Group

Moving a Metadata/ Journal Stripe Group

Using the Dynamic Resource Allocation Feature

8Run snfsdefrag -G <n> -m 0 -r /filesystemroot

where <n> is the zero-based number of the source stripe group from which the move starts, and filesystemroot is the file name of the file system tree’s root. You can specify multiple -Goptions to use multiple source stripe groups.

9Verify that no data remains on the original stripe groups.

10Edit the file system configuration to mark the old stripe groups as “Down.”

11Stop the FSM.

12Restart the FSM.

Note: The old stripe groups marked “Down/Readonly” must be left in the file system configuration file.

Metadata movement is performed on a LUN level, meaning you must specify the source LUN and the destination LUN. The new sndiskmove command that accomplishes metadata movement has two arguments: a source and destination LUN.

After movement is complete, the physical source disk can be removed.

Note: Although a stripe group can consist of multiple disks or LUNs, the sndiskmove command moves only a single disk or LUN. Consequently, references to “stripe group” in this section refer to a single disk or LUN when migrating metadata with sndiskmove.

StorNext User’s Guide 374