>- personally - I have never seen this problem before... Any ideas have a >get his computer to boot up on the external FireWire? > Hi RevDave, I've had this exact problem with my VST SmartDisks when I went to Tiger from X.3.9! Tried to find an answerbb for a long time. Someone somewhere said it was probably a "firmware Issue." In my case the drives are not new enough, and the manufacturer no longer supports them, so I'm out of luck. Sorry for the bad news. Good luck. So long for now, TOM