Comment 29 for bug 518533

This happened to me again when I did a new clean install of Ubuntu 10.10 (on two different machines with the same problem).

The only workaround that works (for me) is to open two terminal windows and in the first go:

  sudo blkid

to see the UUIDs of all devices.

In the second go

  sudo gedit /etc/fstab

and add an additional line for the device(s) that you can't mount.

A couple of examples that work for me are:

  UUID=87b43805-e339-4953-9c9c-328e71c0abdc /media/budisc ext4 users,rw 0 0
  UUID=744C979E4C975A26 /media/seagate ntfs users,rw 0 0

Have system/administration/disk utility open at the same time. Mount seems to work once the /etc/fstab file is updated.