In addition to server failover, path failover and management of host adapters can be part of a server cluster configurations...
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as well as for standard servers to utilize redundant SAN access paths. Path management software is available from many different vendors for different platforms. While this is an oversimplified list of things to do, your SAN storage will need to be configured to be accessed by the different servers including making sure that any zones are setup properly, LUN masking and mapping is adequately configured, and that failover software recognizes which SAN LUNs and volumes to access along with appropriate restart and adapter path assignments.
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