The Local LUN Move feature, also known as Move, provides native support for moving LUNs and VMFS Datastores online between pools or within the same pool. This ability allows for manual control over load balancing and rebalancing of data between pools. Local LUN Move leverages Transparent Data Transfer (TDX) technology, a multi-threaded, data copy engine. TDX is designed to help ensure a low impact on host access during a move session. In Dell UnityOS version 4.3, the Compress Now option has been deprecated.

Local LUN Move can also be leveraged to migrate a Block resource’s data to or from a resource with data reduction and/or Advanced Deduplication enabled. When Move is utilized to migrate data to a resource with data reduction enabled, as the data is migrated via the TDX data copy engine, all data will pass through the data reduction logic. If Advanced Deduplication is supported and enabled, the data will also pass through the Advanced Deduplication algorithm. This allows space savings to be achieved during the migration. When migrating to a resource with data reduction disabled, all space savings achieved on the source will be removed during the migration.

The Move option can be found on the Block page for LUNs. After selecting a storage resource, select the More Actions drop down list, then Move. This launches the Move dialog box. An example of the More Actions dialog box and the Move option can be found in Error! Reference source not found..

Figure 27.    Block Page – Move Under More Actions

The Move LUN dialog box is shown in Error! Reference source not found. below. In this window the user will select the destination Pool for the new storage resource. The user will also select if the resource will be Thin, and if it will have data reduction and Advanced Deduplication enabled. The resource must be Thin for the data reduction option to be available. The Move operation is completely transparent to the host. To start the Move operation, simply select OK in the Move LUN dialog box.

Figure 28.    Move dialog box

Move can also be used for LUNs contained within a Consistency Group. The Move option for Consistency Groups is found on the LUNs tab within the Properties window of a Consistency Group. An example of this is shown in Error! Reference source not found.. After selecting a LUN within the Consistency Group, select More Actions, then Move. A similar dialog box as previously shown in Error! Reference source not found. is displayed. After selecting OK, the data is moved.

Figure 29.    Move – Consistency Group Properties Window – LUNs Tab

Move can also be used with VMware VMFS Datastores. For VMware VMFS Datastores, the Move option is found on the Datastores tab of the VMware page. As shown in Error! Reference source not found., after selecting a VMware VMFS Datastore, the Move option can be found under More Actions. After selecting Move, a dialog box similar to Error! Reference source not found. is displayed.

Figure 30.    Move – VMware VMFS Datastores