Global copy
A configuration option for the Enhanced Remote Mirroring premium feature. This option enables the controller to complete write
requests to the primary logical drive before waiting for an input/output (I/O) completion indication that the data has been
successfully copied to the secondary storage subsystem. Global copy offers faster host I/O performance. Global copy does not
guarantee that data was successfully written to the secondary logical drive before a successful write to the host system is
indicated.