So, I'm planning to migrate the storage in my server to something with a bit more fault-tolerance. I want to do at least RAID 5 with a bunch of 2TB Samsung F4s. Budget is roughly £100 or so. I've been looking at the following: RocketRAID 640 RocketRAID 2640 RocketRAID 2680 I realise that these probably aren't full-blown enterprise-grade RAID cards, but do they provide some degree of processing offloading from the CPU? What are the primary differences between them? Additionally, I'd like to start off with RAID 1 with 2x 2TB drives, and then buy a third 2TB drive later on. Would it then be possible to convert the RAID 1 set to a RAID 5 set without having to wipe the first two drives? Later on, can I add more drives to the RAID 5 set and have its capacity expand? Finally (and most importantly), will I be able to boot Windows Server x64 from the 4TB+ array on a non-EFI computer?