does you external drive has it's own power supply?? power drops can cause this
James
On 29/10/2010, at 14:16, thefrogs wrote:


I have a back up drive that houses my time machine that un-mounts when I try to access file within. It is not every time but it does happen frequently. Sometimes it quits the finder as well. I have rebuilt fixed prefs started up logged out. Every time I leave the mac to sleep and then awaken it the backup disappears and I get the removal message box come up.
10.6.4 on 24in iMac
any thoughts?
tom samson




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