Server Fault is a question and answer site for system and network administrators. It's 100% free, no registration required.

Sign up
Here's how it works:
  1. Anybody can ask a question
  2. Anybody can answer
  3. The best answers are voted up and rise to the top

I had a drive fail of sorts. Now when I try to umount it is says the device is busy despite the device not being in /dev/

Any ideas how I can umount it.

share|improve this question
up vote 2 down vote accepted

According to "man umount" you should be able to use umount -f or umount -l to force the unmount (although -f is for NFS commands, so you'd want to try the -l on a local device; check your man pages to see that you have it supported on your kernel version)

What kind of failure did you have? You could try to see what processes are holding it open with "lsof" then kill those processes if that's what is causing the hold on the filesystem.

share|improve this answer

Your Answer


By posting your answer, you agree to the privacy policy and terms of service.

Not the answer you're looking for? Browse other questions tagged or ask your own question.