About disconnecting or deleting LUNs

You can disconnect a LUN from a host without affecting the contents of the LUN, or you can permanently delete a LUN.

When the host is disconnected from a LUN, you cannot see or modify the LUN’s contents, make Snapshot copies of the LUN, or use Snapshot technology to restore the LUN to a previous Snapshot copy. However, the LUN still exists on the storage system volume.

Guidelines for disconnecting or deleting a LUN:

You must make sure that the LUN you are disconnecting or deleting is not monitored with the Windows Performance Monitor (perfmon).
Make sure that the LUN you want to disconnect or delete is not being used by a host.
You can only disconnect or delete a shared LUN (that is, a non-quorum disk) after removing the cluster resource dependencies from the LUN and verifying that all nodes in the cluster are powered on and functioning properly.
Note: SnapDrive for Windows manages the dependencies to the root disk for volume mount points.
When disconnecting or deleting LUNs on a Microsoft cluster, you must make sure that all hosts in the cluster are available to SnapDrive for the disconnect or delete operation to succeed.
You can disconnect a quorum disk only after replacing it with another disk that takes over as a quorum disk for the cluster.
Use the Delete Disk feature cautiously, because after you delete a LUN, you cannot use SnapDrive to undelete it.

Disconnecting a LUN
You can use the SnapDrive for Windows MMC snap-in to disconnect a LUN in either a normal manner, or by forcing a disconnect.
Deleting a LUN
You can delete a LUN using the SnapDrive for Windows MMC snap-in.

Parent topic: Managing LUNs