I ran into the same issue setting up my HTPC, and the the short answer seemed to be no. The long answer, some people have gotten it to work, but it primarily depends on what you're using for a RAID ...

Apple offers a couple of software RAID solutions for people interested in either creating a larger disk out of two, or mirroring two disks together for data redundancy in the event of a drive failure.

Apple's Mac Pro computers have the capacity of holding up to four internal hard drives, and all Mac models support the use of external drives through either USB or FireWire. This allows for multiple ...