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Mastering VMware vSphere™ 4 by Scott Lowe

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11.9. Replicating SANs

The next form of continuity is replication at the SAN level. What used to be a very expensive solution to deploy has become a much more mainstream configuration. The technology to do block-level replication at a SAN level at first was just for the high-end and most expensive SAN solutions but now is a standard configuration in just about all SAN solutions.

To set up this solution, a company would purchase two SANs that would be set up at different locations, and the data would be replicated between the two sites. The replication could occur via the SAN Fibre Channel network or over an IP connection. A snapshot of the LUN would be taken by the SAN, and then the data would be replicated at a block level. The greater the ...

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