Jon Wever <jon.wever at optusnet.com.au> responded to my inquiry as follows: > The later G4s need all hard disks to be jumpered for cable select. > They shipped with a single drive set to CS so, yes, I think you can > leave it that way without contributing to the problem. The curious thing is that I've resolved the issue by jumpering my remaining drive as Master. Now, I don't have the last generation of Mirrored Drive Doors G4, but the freezes continued while the only drive in the box was jumpered cable select, stopped when I set the jumpers to "master". Jim Robertson --