View Full Version : [ubuntu] Unmount of /dev/nbd0 failed

October 24th, 2010, 07:07 PM
After in-place upgrade from 9.10 to 10.04, the message

Unmount of /dev/nbd0 failed appears on the console at shutdown, with a warning that data may be lost, and followed by a 10 second countdown, after which shutdown continues normally.
Syslog shows this one line at each boot:

Oct 23 10:04:16 m2a74am kernel: [ 1.203334] nbd: registered device at major 43
Nothing gets mounted explicitly at /dev/nbd0, so I am puzzled about the error message on shutdown.

January 29th, 2011, 06:14 PM

I'm having the same issue. It's not causing any problems as far as I can see, but it slows down my shutdown by another 10+ seconds.

Perhaps some shutdown script simply needs to check if something is mounted before unmounting it so it can avoid freaking people out?