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Dell PowerVault MD 34XX/38XX Series Storage Arrays CLI Guide

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Differences Between Remote Replication And Remote Replication (Legacy) Features

The standard Remote Replication premium feature uses a point-in-time snapshot image to capture the state of the source virtual disk and only writes data that has changed since the last point-in-time image. The Remote Replication (Legacy) premium feature reproduces every data write to the local (primary) virtual disk on the remote (secondary) virtual disk through a Fibre Channel-only connected configuration. While not producing a fully synchronized data view between both storage arrays, standard Remote Replication offers a much faster replication solution that can run on both iSCSI and Fibre Channel configurations.
  • NOTE: Both remote and local storage arrays must of the same data protocol. Replication between Fibre Channel and iSCSI storage arrays is not supported.

Standard Remote Replication creates a repository virtual disk for each replicated pair, increasing throughput between local and remote arrays. Remote Replication (Legacy) uses a single repository virtual disk for all replicated pairs.

Physical distance between local and remote storage arrays is unlimited using the Standard Remote Replication premium feature. Remote Replication (legacy) is limited to approximately 10 Km (6.2 miles) between local and remote storage arrays.


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