On Thu, Feb 12, 2009 at 1:00 PM, <sf...@users.sourceforge.net> wrote:
>
> Nitin Bhardwaj:
>> > (shutdown)
>> > umount /sysroot/bin
>> > # you may specify $PATH
>> > mount -o remount,ro,mod:/bin=ro /aufs/bin
>> >
>> After the kernel starts executing init ( and comes out of the initrd
>> ), there is no /sysroot - it becomes /
>> Hence this command gives error:
>> umount: /sysroot/bin not found.
>>
>> So, If I try "umount /bin" it says:
>> umount: /bin: device is busy
>
> I see.
> Probably your umount command exists under /bin.
> Then I'd suggest you to "umount -l /bin".
Yes. mount,umount are on /bin in RHEL. And shutdown binary in on /sbin.
Tried "umount -l". That has a cyclic dependency: unmounting /bin
renders any command(s) thereafter unable to execute.
What I want is this:
1. Somehow, I should be able to unmount the union of
/.mount/{bin,sbin,usr,lib} and /aufs/{bin,sbin,usr,lib} (since at this
point I no longer require read-write facilities).
2.remount /.mount/{bin,sbin,lib,usr} on /bin,/sbin,/lib,/usr , so
that the shutdown can go ahead as earlier ( before adding aufs logic )
>
>> However, the remount goes ahead fine.
>
> And cleanly unmounted? No more fsck messages?
>
No. The read-only remount goes ahead fine, but while shutdown I get
the same errors:
umount2:/tmp:Device or resource busy
umount2:/usr/:Device or resource busy
umount2:/sbin:Device or resource busy
umount2:/bin:Device or resource busy
And the fsck messages on the boot up again:
/dev/hda1:Superblock last mount time is in the future. FIXED.
/dev/hda1:Superblock last write time is in the future. FIXED.
/dev/hda1: clean, xxx files, yyy blocks [ OK ]
Thanks,
Nitin.
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