I keep a pair of Seagate 7200.11's in the Mac Pro mirrored for online client data, working files and a bunch of other stuff. They've been humming along fine for the last year or so without a hitch, but one of the disks seemed to take a dump today. Fine I say, that's why they're mirrored, but the mirror refuses to mount now I've messed around in disk utility without success - the good disk shows as apple raid offline, disk utility doesn't show any raid when I ask it. Ideally I'd like to just get this bish back online as a normal volume, throw my spare in and rebuild. I'd settle for throwing the spare in and recovering my files into a disk that does mount. What do I do?