On Wed, Feb 11, 2009 at 10:18 PM, <sf...@users.sourceforge.net> wrote:
>
[...]
>
> But I noticed it won't work for you.
> Because you are over-mouning /bin, the mount command
> ("remount,mod:/bin=ro") at shutdown-time will not find "/bin" branch
> which should be set readonly.
>
> If you don't want to upgrade and re-compile your aufs, you need to
> separate these names by tricky binding or something.
> For example,
>
> (boot)
> mkdir /sysroot/aufs/bin
> mount -t aufs -o xino=/sysroot/tmp/xino,br:/sysroot/bin:/sysroot/.mount/bin \
> aufs /sysroot/aufs/bin
> mount -o bind /sysroot/aufs/bin /sysroot/bin
System boots fine.
>
> (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
However, the remount goes ahead fine.
Thanks,
Nitin.
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