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Data replication can play a key role in assuring data availability and recovery for networked storage. Replication in the form of data snapshots as well as full site-to-site mirroring can be achieved via three methods:
- Host Based. Software running on the host servers manages volume copying and replicates storage writes.
- Array Based. Replication is done by software running on a disk array controller.
- Network Based. Replication is managed on the network either through software on a “smart” switch or via network attached appliance or server.