Dell PowerStore Protecting Your Data

Using metro for high availability

A Metro volume is exposed using two distinct storage arrays that cooperate to expose a single Metro volume to application hosts by providing the same SCSI image and data. The hosts and applications running on them perceive two physical volumes as a single volume with multiple paths. As a result, hosts can access both sides of the Metro volume. If there is a link loss or failure of one of the systems, host access can still be maintained to the active system.

Metro protection provides bi-directional synchronous replication, where both sides of the Metro volume can be used for production. Instead of disaster recovery (by failing over a replication session to a remote system), Metro enables disaster avoidance by providing automatic synchronization between the systems without downtime.