Scsi controllers are very sensitive to resets and getting out of step with the state of the bus the initiators they control. Scsi can have multiple initiators, and you may of course have a system which acts as a target, but i'm guessing since you said drives, you have a pretty common setup, a system with drives attached, where the scsi device on your system is the initiator. One thing that throws off scsi is to do a reset which comes from somewhere the initiator doesn't know about.? many are not friendly when that happens and just end up hung up.? Reset tells all the devices to stand down, and it is expected that an enumeration of the bus will take place by all the initiator(s). That may have happened if you reset your other processors or did something which affected the initiator.? And the resets on most systems usually hit all components, so I'd be surprised if only the one processor was affected. thanks Jim