umount fails with device is busy

[Dave Chinner]

On Mon, Mar 21, 2011 at 03:53:04AM -0700, stress_buster wrote:
> 
> I'm trying to run xfs_repair on my filesystem:

Why do you need to do this?

> Firstly to unmount the fs
> 
> Quote:
> umount /myfs
> umount: /myfs: device is busy
> umount: /myfs: device is busy  
> 
> Quote:
> lsof /dev/sda  
> 
> -show none ie nothing seems to be 'touching' the disk.
> confused why its still showing device is busy

Did you have an oops or a filesystem shutdown? i.e. anything in
syslog of note?

Cheers,

Dave.
-- 
Dave Chinner
david at fromorbit.com