OK. This is what has been done on this server....
I tried switching my HD from a 2940 to a 2120S RAID controller first. I first installed the Windows drivers before I attached the HD to it. When I rebooted it told me that no OS could be found (the 2940 card was already removed).
Then I put the HD back on the 2940 card so I could boot back to the OS. We then installed a 29320 card so that we could reattach an Exabyte Mammoth-2 tape drive into the server (it was away for repairs). So now I have a HD on the 2940 and a tape drive on the 29320. Since I have put the tape drive back with the 29320, the HD has been acting wierd. I receive a BSOD when the ArcServe tried to do a back up (I first get disk errors in the event log before it blue screens). So now I'm not doing any backup jobs on that server, and it has not blue screened since. But I'm trying to rebuild my mirror, but within disk management it says "regenerating". Any suggestions.....
My ultimate goal would be to get these HD onto the 2120S RAID controller without losing the OS and data.