Re: [gentoo-user] How to unmount bind-mounted /dev?

[Mick <michaelkintzios@gmail.com>]

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On Sunday 01 May 2011 00:48:38 Alex Schuster wrote:
> Mark Shields writes:
> > On Sat, Apr 30, 2011 at 5:15 AM, Alex Schuster <wonko@wonkology.org
> > 
> > <mailto:wonko@wonkology.org>> wrote:
> >     I just wrote:
> >     > Thomas Ulrich Nockmann writes:
> >     >> try 'umount -l /32/de'
> >     > 
> >     > Cool, this does the trick!
> >     
> >     But it does not help :(  After unmounting /32/dev, I can finally
> >     unmount /32, but now the fsck fails:
> >     
> >     weird ~ # fsck -Cf /dev/mapper/32
> >     fsck from util-linux 2.19
> >     e2fsck 1.41.14 (22-Dec-2010)
> >     fsck.ext3: Device or resource busy while trying to open
> >     /dev/mapper/32 Filesystem mounted or opened exclusively by another
> >     program?
> >     
> >     lsof and fuser report nothing. I guess I will have to reboot then.
> > 
> > Try a lazy umount, or forced umount?
> > 
> > # umount -f
> > # umount -l
> 
> The lazy unmount was Thomas' hint already and worked, the partition is
> no longer mounted. But I cannot fsck it, it is still in use. cryptsetup
> luksClose works neither.
> It's no big trouble, but still I'm curious why this is.
> 
> 	Wonko

Asking the obvious:  could this message be there because this partition is 
still mounted?  Did you check that this partition has been unmounted from all 
mount points, both original mount point and bind-mount?
-- 
Regards,
Mick

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