Dell EMC Unity: How to Move/Migrate Unity Datastore /LUN /Vvol (User Correctable)

How to Move/Migrate Unity - Datastore /LUN /Vvol ?

Unity Move feature: 
Unity Move feature is an online activity which is a native support for moving LUNs and VMFS Datastores online between pools or within the same pool. However it is not applicable to Vvols, as it cannot be migrated on Unity.
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, transparent data copy engine. TDX is designed to help ensure a low impact on host access during a move session.

The Migrated LUN will inherit its existing properties, i.e[ Name, Description, Size] and can not be changed. The only possible changes is to change the LUN from Thick to Thin or Vice versa , set Data reduction and advance deduplication option. 

To Migrate a Datastore:
Goto : Unity Unisphere > Storage  > VMware > Select the Data store > On top left click  More Actions  > Move .
Once done, a pop up will occur.
Set the priority of migration > Choose to which pool you want to migrate > Check or Uncheck the Thin provision option> Click Ok once done.

You can monitor the Move operation progress from the properties of the data store.

Note:
If the Datastore has snapshots, after the move session is complete, the snapshots on the Datastore, including those in use by applications, will no longer be valid and will be deleted.
It will prompt with the below message:

" The Datastore has one or more snapshots. After the move session is complete, the snapshots on the Datastore, including those in use by applications, will no longer be valid and will be deleted.
Note: The performance of some applications using snapshots may be adversely impacted if the snapshots are deleted."
Do you want to move the Datastore?"


To Migrate a LUN:
Goto : Unity Unisphere > Storage  > Block > Select the LUN > On top left click  More Actions  > Move.
Once done, a pop up will occur, Set the priority of migration > Choose to which pool you want to migrate > Check or Uncheck if Thin provision needed > Click Ok once done.

You can monitor the Move operation progress from the properties of the LUN.

Note:
Ensure enough space in the pool before migration.
Ensure no replication session exist on the LUN before migration.  All existing snaps will be lost after Move operation .

LUN Move will fail with replication:

 The LUN has one or more snapshots and it is participating in a replication session. In order to move the LUN, the replication session must be deleted. Replication can be reconfigured after the move operation completes. "

Note:
After the move session is complete, the snapshots on the resource, including those in use by applications, will no longer be valid and will be deleted. The performance of some applications using snapshots maybe adversely impacted by the snapshot deletion.

LUN Move with snapshot will prompt below message-

 The LUN has one or more snapshots. After the move operation is complete, the snapshots on the resource, including those in use by applications, will no longer be valid and will be deleted.
Note: The performance of some applications using snapshots maybe adversely impacted by the snapshot deletion.
Do you want to move the LUN? 

Refer the document :   DELL EMC UNITY: MIGRATION TECHNOLOGIES