RAID system I have a problem with making a RAID on my new iomega ultramax pro. It's the first time i've tried to do this so bare with me. I've set the drive on a mirrored RAID system  on the back of the drive and formatted the disk with disk utility, in macosx 10.4. Before i did this, both disks were working, but now i only see one disk in my disk utility, of 600 gb. It seems he can't read the other disk anymore.  How can i make sure the other disk is still there? And is functioning as a backup disk?  Thanks for helping me, Eline