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Dell PowerVault MD 32XX/36XX Series Storage Arrays CLI Guide

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Using The Remote Replication (Legacy) Premium Feature

The Remote Replication (legacy) premium feature provides for online, real-time replication of data between storage arrays over a remote distance. In the event of a disaster or a catastrophic failure on one storage array, you can promote the second storage array to take over responsibility for computing services. Remote Replication (legacy) is designed for extended storage environments in which the storage arrays that are used for Remote Replication (legacy) are maintained at separate sites. Virtual disks on one storage array are replicated to virtual disks on another storage array across a fabric SAN. Data transfers can be synchronous or asynchronous. You choose the method when you set up the remote replicated pair. The data transfers occur at Fibre Channel speeds to maintain data on the different storage arrays. Because Remote Replication (legacy) is storage based, it does not require any server overhead or application overhead.

You can use Remote Replication (legacy) for these functions:
Disaster recovery Remote Replication (legacy) lets you replicate data from one site to another site, which provides an exact duplicate at the remote (secondary) site. If the primary site fails, you can use replicated data at the remote site for failover and recovery. You can then shift storage operations to the remote site for continued operation of all of the services that are usually provided by the primary site.
Data vaulting and data availability Remote Replication (legacy) lets you send data off site where it can be protected. You can then use the off-site copy for testing or to act as a source for a full backup to avoid interrupting operations at the primary site.
Two-way data protection Remote Replication (legacy) provides the ability to have two storage arrays back up each other by duplicating critical virtual disks on each storage array to virtual disks on the other storage array. This action lets each storage array recover data from the other storage array in the event of any service interruptions.

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