The array controller you are looking at means that it is possible a solution similar to the MSA500. I can't confirm that this is the exact case, as the web site isn't letting me get to any product documentation. I can however share how the MSA500 works.

Basically, it's a poor mans SAN. Each server needs an Ultra 320 SCSI card (or rather a Smart Array card ), and the MSA500 has a Smart Array based controller in it. The SCSI connections from the server to the MSA500 are isolated from each other, keeping the two devices alone on their chains to avoid contention issues in high load environments. Then the disks are attached to the MSA500 on their own SCSI chain. The configuration we allow has a maximum of 4 computers running Linux or Novell clustering solutions, or two node Windows clustered. There are options for redundant controllers in the MSA for automatic failover, and also an option for 2 node, 2 cable/hba setups with some "multipath" software to keep Windows from having issues when the storage path changes.

Generally the classic two controllers on a single SCSI chain is a bad idea in any environment that might see a high load. Since in that type of configuration, one of the two controllers would have a higher priority ID and would be able to monopolize the bus if it ever got busy. As far as I know, Compaq and Digital never sold such a solution, instead always going towards setups like the MSA500 that isolated the two server SCSI controllers from each other.