On Fri February 6 2009, Nitin Bhardwaj wrote:
> On Fri, Feb 6, 2009 at 1:29 PM, <sf...@users.sourceforge.net> wrote:
>
> >
> > Hello Nitin,
> >
> > Nitin Bhardwaj:
> > > mount -t aufs -o br:/sysroot/bin:/sysroot/.mount/bin=ro none /sysroot/bin
> > > mount -t aufs -o br:/sysroot/lib:/sysroot/.mount/lib=ro none /sysroot/lib
> > > mount -t aufs -o br:/sysroot/sbin:/sysroot/.mount/sbin=ro none
> > /sysroot/sbin
> > > mount -t aufs -o br:/sysroot/usr:/sysroot/.mount/usr=ro none /sysroot/usr
> > > [...]
> > >
> > > I get the following mount errors:
> > > mount: could not find filesystem 'none'
> > > mount: could not find filesystem 'none'
> > > mount: could not find filesystem 'none'
> > > mount: could not find filesystem 'none'
> > >
> > > After which, obviously, my init fails to execute and kernel panic.
> > >
> > > Sorry for the long mail, but why am I getting these errors about 'none'
> > > filesystem ? Because when I try to use aufs
> > > on my currently running custom squashed system, it mounts fine !
> > >
> > > ------------------------------------------
> > > modprobe aufs
> > > mount -t aufs -o br:/tmp/rw:${HOME}=ro none /tmp/rw
> > > ------------------------------------------
> >
> > I am afraid your mount command in your initrd has another syntax.
> > If you try "mount --help" or something in your initrd, it may show the
> > correct syntax and you will know the answer...
> > As long as I don't know what your mount command is, I have nothing to
> > answer you, sorry.
> >
> >
> > J. R. Okajima
> >
>
> Hi,
>
> I think the problem is with the shell which executes within the RHEL initrd.
> The initrd of Redhat Enterprise Linux 5.2 ( also Fedora ) executes nash
> shell ( http://linux.die.net/man/8/nash ),
> whose mount command requires a device and a mount-point necessarily.
>
> -------- From the manpage -----------
> *mount [--ro]* -o *opts* -t *type device mntpoint* Mounts a filesystem. It
> does not support NFS, and it must be used in the form given above (arguments
> must go first). If *device* is of the form *LABEL=foo* the devices listed in
> /fB/proc/partitions will be searched, and the first device with a volume
> label of *foo* will be mounted. Normal
> *mount<http://linux.die.net/man/2/mount>
> (2)* options are supported, and *--ro* will mount the filesystem read only
> for compatibility with older versions of nash. The *defaults* mount option
> is silently ignored.------------------------------------------------- Hence,
> I'm realizing that the nash-mount doesn't support 'none' device name. Is
> there any lead here ?
>
I don't have a RH system to try this on - but I would try using the filesystem
name for the 'device' - - that generally works in none-RH systems for "no
device"
mount commands (I.E: 'tmpfs' as the device when mounting tmpFS, 'sysfs' as the
device when mounting sysFS, etc. In this case, device: 'aufs')
Mike
>
> Thanks,
> Nitin.
>
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