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 ...
XDA Developers on MSN
How I use software RAID on Windows to speed up drive access and add redundancy
RAID or Redundant Array of Independent Disks combines multiple disks into a single storage pool that the operating system views as a single drive. While enterprise systems use hardware RAID with a ...
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.
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