Try to get one with RAID - at least mirrored, ideally striping with parity. That way your SAN isn't a single point of failure - if one of the disks goes down, you can rebuild the array from the remaining disks. For true redundancy you should have two of these, in case the whole array goes down (e.g. power surge kills all of the disks). Iomega and Buffalo all do SAN drives with built-in RAID (i.e. they contain multiple physical disks which are exposed as a single share).
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moto
