Hi Eben,
It's quite complex when you are unmounting mounted partitions, some processes may use the partition you have mounted already
So you can use the lazy unmount
umount -l /misc/scratch
I think it will be fix this issue ...
thanks
urs
karthik
--- On Mon, 2/23/09, Eben King <eben01@verizon.net> wrote:
From: Eben King <eben01@verizon.net>
Subject: Re: [SLUG] "mount" weirdness
To: "SLUG Mailing List" <slug@nks.net>
Date: Monday, February 23, 2009, 6:36 PM
On Tue, 24 Feb 2009, Paul M Foster wrote:
> On Tue, Feb 24, 2009 at 12:56:08AM -0500, Eben King wrote:
>
>> 'Splain this, please.
>>
>> eben@pc:~$ sudo umount /misc/scratch/
>> umount: /misc/scratch: device is busy
>> umount: /misc/scratch: device is busy
>>
>> eben@pc:~$ lsof -n | grep scratch
>> eben@pc:~$
>>
>> Why's it busy, then? This might explain why automount never lets
it
>> umount.
>> In particular:
>>
>> eben@pc:~$ sudo /etc/init.d/autofs stop
>> Stopping automounter:
>> Couldn't stop automount for /misc done.
>>
>
> Looks like it's /misc, not /misc/scratch that's actually busy,
since
> autofs reports /misc as the thing it couldn't umount.
It doesn't mount /misc, that's just where the mount points are.
> My problem with things like this is that I always have mc opened on the
directory I want to umount. I don't know if lsof shows it when I do that,
but that's what always snags me. In any case, you might try lsof -n | grep
misc and see what it says.
eben@pc:~$ lsof -n | grep /misc
man 6203 eben 6r DIR 8,5 4096
1811521 /misc/export/man
man 6203 eben 7r DIR 8,5 4096
1355173 /misc/export/X11/man
Hm, OK, look for a man page.... found one:
eben@pc:~$ lsof -n | grep /misc
eben@pc:~$
Still won't work:
eben@pc:~$ sudo umount /misc/scratch ; sudo lsof -n | grep -e /misc -e scratch
; sudo /etc/init.d/autofs stop
umount: /misc/scratch: device is busy
umount: /misc/scratch: device is busy
automount 3102 root 5r DIR 0,18 0
6200 /misc
hald 4381 haldaemon mem REG 8,2 171981
121529 /var/lib/misc/usb.ids
hald 4381 haldaemon mem REG 8,3 529991
443185 /usr/share/misc/pci.ids
Stopping automounter:
Couldn't stop automount for /misc done.
eben@pc:~$
The stuff from hald's in there because its path contains "/misc".
I don't know an easy way to exclude it.
-- -eben QebWenE01R@vTerYizUonI.nOetP http://royalty.mine.nu:81
LEO: Now is not a good time to photocopy your butt and staple it
to your boss' face, oh no. Eat a bucket of tuna-flavored pudding
and wash it down with a gallon of strawberry Quik. -- Weird Al
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