Configuration: Disk Groups and Virtual Disks 133Using Unconfigured CapacityYou can increase the capacity of a standard virtual disk or a snapshotrepository virtual disk using the unconfigured capacity when no free capacityexists on a disk group. An increase is achieved by adding unconfiguredcapacity, in the form of unassigned physical disks to the disk group of thestandard virtual disk or the snapshot repository virtual disk. See "Disk GroupExpansion" on page 131.For more information, see the PowerVault Modular Disk Storage Manageronline help topics.Disk Group MigrationDisk group migration allows to you export a disk group so that you can importthe disk group to a different storage array. You can also export a disk group sothat you can store the data offline.NOTE: During the export process (before the disk group is imported) you loseaccess to the data on the exported disk group.NOTE: You must export a disk group before you move the disk group or import thedisk group.Export Disk GroupThe export disk group operation prepares the physical disks in the disk groupfor removal. You can remove the physical disks for offline storage, or you canimport the disk group to a different storage array. After you complete theexport disk group operation, all of the physical disks are offline. Anyassociated virtual disks or free capacity nodes are no longer shown in MDSM.Non-Exportable ComponentsYou must remove or clear any non-exportable settings before you cancomplete the export disk group procedure. Remove or clear the followingsettings:• Persistent reservations• Host-to-virtual disk mappings• Virtual disk copy pairs• Snapshot virtual disks and snapshot repository virtual disks
