Does MSCS support PCI RAID controllers?
Selected PCI RAID controllers may be validated within an MSCS cluster configuration. Some of these controllers store information about the state of the array on the card-not on the drives themselves-so it’s possible that the cards in the two servers might not be in synch at the moment a failover occurs. For this reason, RAID controllers that store information in the controller will not work with MSCS. MSCS cluster configurations will only be validated with RAID solutions that store the meta-data for RAID sets on the disks themselves so that it is independent of the controllers.