Messages in this thread | | | Date | Wed, 6 Mar 2002 01:15:19 -0700 | From | Andreas Dilger <> | Subject | Re: mount -o remount,ro cause error "device is busy" |
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On Mar 05, 2002 23:49 -0800, Mike Fedyk wrote: > On Wed, Mar 06, 2002 at 04:40:10PM +0900, Michael Cheung wrote: > > I have upgraded my kernel to version 2.4. > > And i have tested 2.4.16 and 2.4.18. Both of these > > two version have the same problem when system reboot. > > "/: device is busy"; > > in shutdown script: > > umount -a > > mount -n -o ro,remount / > > these two line result error: device is busy. > > > > We need more info about your config. Do you have any patches in this > kernel? What modules have been loaded? Highmem? x86? drive controller? > drive? ram size? lspci output, etc...
Please don't send that. It clearly appears to be a user problem. Order of operations, as I read in the original email: 1) "/" and "/usr" are busy 2) shut down to single user mode 3) "/" still busy 4) "/usr" can be unmounted 5) didn't check that root can be remounted after umounting "/usr"
Clearly, some program is keeping "/usr" busy (which is keeping "/" busy) before the change to single user mode. Just a bit of "lsof" needed to find such things.
Cheers, Andreas -- Andreas Dilger http://sourceforge.net/projects/ext2resize/ http://www-mddsp.enel.ucalgary.ca/People/adilger/
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