I think Jonathan nailed it. I had the same problem with a 1TB LaCie I was using for Time Machine. I contacted LaCie, gave them my serial number and they mailed me a new power supply. Check their website for details. They didn't even want the old power supply back. (It may be a known issue.) Milton van der Veen > Jonathan, > You might have a problem with the power supply. > I had a problem with an OWC enclosure used for Time Machine that I just > could not figure out. The drive mounted but was not accessible. Disk Warrior > and Disk Utility did not help. I took out the two hard drives and installed > them in my Mac Pro and they worked just fine. I finally called OWC and the > tech suggested returning the power supply for a replacement and the new one > got the enclosure to work again. > Just a thought. > Maris > > > On 12/18/08 3:37 PM, "Jonnythan" <jonnythanster at googlemail.com> wrote: > >> Hello everybody, >> >> I have a 1tb LaCie drive that I've been using for Time Machine on a PPC G5 >> (OS X 10.5.5). >> >> Then it went wrong, refusing to mount, and Disk Utility, Drive Genius and >> Disk Warrior couldn't fix it. With the latter, attempting to fix it caused >> the system to crash. >> >> I tried re-formatting with Disk Utility, but this refused to finish after >> leaving it running for an hour. >> >> So I successfully re-formatted using Drive Genius. But then Time Machine >> reported the back-up was unsuccessful. So I ran Drive Genius to try and fix >> the drive, and this caused the system to crash. >> >> Now the system crashes if I so much as turn the drive on! >> >> Any ideas? >> >> >> Best, >> >> Jonathan. >> >>