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USB drive is /dev/sdc, and mounted using the UUID as /Elements. Inserted USB caddy which I use to use a few months back with a new disk (unformatted) - the old disk took a jolt too much. At this point /Elements is unusable (IO errors). On investigation I find that the disk that was sdc is now sdd. Disconnect the new drive, wait a bit, insert again, and my /Elements data is now on /dev/sde. (umount /Elements ; mount /Elements and working again). So I assume it is inserting the new drive with the lowest free label (sdc?), and shifting the others up one, breaking mounted filesystems in the process. (I killed of GNOME and it does the same, I killed of udev and it does the same). Now given I just switched to mounting this drive with UUID, I don't much care what it is called, but I do care that it doesn't break a mounted file system simply because I plugged another USB drive in. Obvious unclear if this is some history of my server, as I can't believe it is the default behaviour. Someone have a clean install of Wheezy and a couple of USB drives to try it on? I see a load of questions on related topics in the forums, but nothing quite the same as I am seeing. I mean I know (well think I know) how to write a udev rule to fix them to whatever I want, but if this is the default behaviour after upgrading to Wheezy the nice folks at Debian will probably want to know. Possibly there is a package (usbmount or similar) to address this which isn't installed by default on upgrade. That said not had similar issues before, so it is possible there is some legacy reference in the system to the USB caddy - if so any idea where will it be, nothing in /etc/udev looked plausible? Simon -- The Mailing List for the Devon & Cornwall LUG http://mailman.dclug.org.uk/listinfo/list FAQ: http://www.dcglug.org.uk/listfaq