I plugged in an external hard drive into my computer running Linux Mint 17.2. This NTFS formatted drive has worked before, but now I get the following:

Error mounting /dev/sdf2 at [DIRECTORY]: Command-line `mount -t "ntfs" -o "uhelper=udisks2,nodev,nosuid,uid=1000,gid=1000,dmask=0077,fmask=0177" "/dev/sdf2" "[DIRECTORY]"' exited with non-zero exit status 21: mount: according to mtab, /dev/sdf2 is already mounted on [DIRECTORY]

The thing is, [DIRECTORY] doesn't exist and I can't unmount it. Running df doesn't show /dev/sdf2. How can I get this drive to mount?

1 Answer 1


Review your mtab file. Delete the entry for the drive and reboot your system. Then re-mount the drive. The mtab file may be found at: /etc/mtab.

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