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Re: Cannot umount: device is busy

On Thu, 14 Apr 2011 13:50:58 +0000, T o n g wrote:

>> have you tried to force the umount ?
> Hi, thanks everyone for the replies.
> No, this is not a NFS share but a local dev mount, so stopping nfs or
> using force (in case of an unreachable NFS system) won't help.

Here is what happened after I use lazy unmount, which is exactly the 
situation that I want to avoid:

  % sync; sync; sync

  % umount -l /mnt/mpoint

  % mount /mnt/mpoint
  mount: /dev/sdb14 already mounted or /mnt/mpoint busy

  % mount | grep /dev/sdb14 || echo no found
  no found

I.e., I want to cleanly unmount the local dev so that I can do a clean 
mount again. Now I can't ... 

Please help. 

Tong (remove underscore(s) to reply)

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