4422 Views 5 Replies Latest reply: Mar 4, 2008 11:01 AM by George Machen
Hi George Machen-
Are you sure the drive works otherwise?
LaCie drives have been known to have power supply bricks fail intermittently with no other symptom except stuff like this. The drive still spins up and the little blue light comes on and it works most of the time.
Could touched mean static discharge?
Thanks for the suggestion, Paul. But I'm concerned about the "f" qualifier, which is a force-unmount (which of course was your point about making sure there are no open files). I'm afraid of possibly doing some damage in the absence of knowing why the system insists that the drive otherwise is "in use" when attempting to unmount.
As I said earlier, an lsof reveals that there are no open files, and I double-checked that nothing on that drive is being shared, so what I'm really seeking is someone who's actually experienced this problem and found the culprit.
You see, we're running three rotating bootable backups per week, and one of my people regularly needs to be able to swap drives in-and-out to take one off-site. It presents a problem to connected users to have to restart the server just to catch the short window when the dive's plug safely can be pulled.
But what's really piqued my interest - and might provide a clue to others in diagnosing this - is the aforementioned curiosity that the drive temporarily is unmountable in at least two circumstances:
1) immediately after a backup with SuperDuper!
2) immediately after a Verify Disk Permissions in Apple Disk Utility
... but if it's re-mounted it promptly ceases being unmountable again.