The network specialist came yesterday with his high tech tester and found nothing wrong after a few hours and said he felt it was electrical. Of course while moving the computers on the floor around, the power cord was accidentally pulled from the unix tower and that was all she wrote for those drives. Upon coming up it threw SCSI errors and panic K-trap errors and after 5 more hours the computer and main and backup drives were replaced. Also he kicked off some registers and that took hours to fix. It was not a fun day and I'm sure they'll be sending others to check more things next week which means more crap for me to fix.