I assume you're getting the kernel panic message, right? Since I'm getting a Big Al, I'd be interested in seeing the kernel panic log to see if I can tell something about what causes it. Do you think you could send it to me? It's located in /Library/Logs/panic.log and is a plain visible file. If you'd be willing too, take a look at it and cut out the panics that have a time stamp from other than when you tried the new hard drive. I should mention though that I believe it requires a complete successful reboot without losing your PRAM for this log to be written to the hard drive, so you may only have one entry, or you may have none. Thanks, Steve Wozniak <steve at woz.org> writes: > I put a fresh 80 GB drive into a friend's TiBook which was here and we > erased it and installed the system off the same system DVD I had used > to install on my Big Als, without success. The TiBook exhibited the > same failure mode as the Big Als. Very shortly after booting a dialog > comes up saying to hit the power button to shut down. > > Then we partitioned the drive, with the largest partition being about > 50 GB, erased it, and installed a sytem again. The install went > normally, as before, but this time the disk booted up successfully. > > So there appears to be some volume size limitation, and it applies to > both TiBooks and Big Als. Kynan Shook kshook at mac.com http://homepage.mac.com/kshook/index.html