Unable to unmount mounted device, not found in mtab

I have a usb drive (/dev/sdb) which is mounted in my system:

$ mount
...
/dev/sdb1 on /media/jviotti/CD8B-7D3E type vfat (rw,nosuid,nodev,uid=1000,gid=1000,shortname=mixed,dmask=0077,utf8=1,showexec,flush,uhelper=udisks2)
...

However trying to unmount it from the terminal leads to the following error:

$ sudo umount /dev/sdb -v
Could not find /dev/sdb in mtab
umount: /dev/sdb: not mounted

Can someone explain what is happening? How should I proceed to unmount the device from the terminal?

1 Answer

As you can see /dev/sdb1 is mounted at /media/jviotti/CD8B-7D3E.

Try the command in a terminal: sudo umount /dev/sdb1 -v

sdb points your HDD and different partitions of HDD will be listed as different 'files'. In your case I guess there is only 1 partition i.e sdb1

2

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