On 2/26/06 2:39 AM, Jan Melichar wrote: > Yes they were. Apart from coming across this problem and your email > how else might I have found out about disconnecting the FE drives > prior to updating a system? It was a huge issue with OS X 10.3.6, 10.3.7, 10.3.8, and 10.3.9 -- so much so that Apple wrote it right in the release notes for the update. Those of us who lived through that will never leave a FW disk connected during update again. :-) You mention having a G5, so depending when you got it, you may never have used Panther, in which case, you wouldn't know. It's of course possible that it's *not* the issue; Apple lists a few other pages for troubleshooting external FireWire devices, too -- cables, power, dirty connection, etc. Are any of these possible? There are also troubleshooting tips on LaCie's site, as well: > The Mac boots but the hard drive does not mount on the desktop. > > OS X > # Try a different cable. > # Repair the Permissions. Open the Disk Utilities and click on the First Aid > Tab. Highlight your 'boot volume' on the left side of the window and click on > 'Repair Permissions'. (Don't bother verifying first. It takes as long as > repair and something always needs repairing). > # Shut down, power off and disconnect all devices. Unplug the computers power > cable (or remove the battery if a laptop). Wait about 15 minutes. Plug > everything back in and boot up. This may reset the bus. peace, Linda