Not sure I have enough information here but I ran into something similar and I had to remove all 3 of the drives from the system, they were SATA drives and I connected them to another computer and ran a RAID Reconstructor application to build the array. Once I had that rebuilt I was able to run a data recovery tool to restore the data to a new set of drives. My problem was simple in that 2 of the drives went bad. I’m not a commercial for these products but they were inexpensive and they worked great for me, http://www.runtime.org/. If you have a RAID 5 setup, you cannot simply connect one of the drives and restore the data, you have to rebuild the array, then restore the data.