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Failure in a disk array can happen and protection beyond the disk drive RAID protection may be necessary. Mirroring may be the answer. It can be done with software or through an appliance such as an in-the-data-path virtualization solution. You are correct in that you want the failover to be handled in some automated fashion. There's no easy answer, but I suggest you look into the mirroring options (not just software).
Randy Kerns
Evaluator Group, Inc.
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