Remote Mirror

A Remote Mirror is a mirrored logical drive pair that consists of a primary logical drive at the primary site and a secondary logical drive at a secondary, remote site.

The secondary, remote logical drive is unavailable to secondary host applications while mirroring is underway. In the event of disaster at the primary site, you can fail over to the secondary site by performing a role reversal to promote the secondary logical drive to a primary logical drive. Then the recovery host will be able to access the newly promoted logical drive and business operations can continue.