Configuration: Disk Groups and Virtual Disks 145
Disk Group Migration
Disk group migration allows to you export a disk group so that you can import
the disk group to a different storage array. You can also export a disk group so
that you can store the data offline.
NOTE: During the export process (before the disk group is imported) you lose
access to the data on the exported disk group.
NOTE: You must export a disk group before you move the disk group or import the
disk group.

Export Disk Group

The export disk group operation prepares the physical disks in the disk group
for removal. You can remove the physical disks for offline storage, or you can
import the disk group to a different storage array. After you complete the
export disk group operation, all of the physical disks are offline. Any
associated virtual disks or free capacity nodes are no longer shown in MDSM.
Non-Exportable Components
You must remove or clear any non-exportable settings before you can
complete the export disk group procedure. Remove or clear the following
settings:
• Persistent reservations
• Host-to-virtual disk mappings
• Virtual disk copy pairs
• Snapshot virtual disks and snapshot repository virtual disks
• Remote mirror pairs
• Mirror repositories

Exporting a Disk Group

On the source storage array:
1
Save the storage array configuration.
2
Stop all I/O, and unmount or disconnect the file systems on the virtual
disks in the disk group.
3
Back up the data on the virtual disks in the disk group.
book.book Page 145 Thursday, December 9, 2010 3:20 PM