remote mirror
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, the user can fail over to the secondary site. The failover is done
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.