Xen users - Oct 2007 - Xen Install: "No filesystem could mount root, tried: ext2"

Hey guys, first time install, would appreciate any help.

On booting up the following error occurs: "No filesystem could mount root,
tried: ext2. Kernel panic - not syncing: VFS unable to mount root fs on
unknown-block(0,0)"

Like I say, any ideas very much appreciated. I''ve copied my menu.lst
entry for Xen below if it''s any use,

Cheers,
Ali

grub menu.lst:

title Xen 3.0 / XenLinux 2.6
  root (hd0,0)
  module /boot/xen-3.1.gz dom0_mem=262144 noreboot
  module /boot/vmlinuz-2.6-xen root=/dev/hda1 ro console=tty
  module /boot/initrd-2.6-xen


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Hi Ali,

I had the same error before. I tried two things and I''m not sure which
one
was the actual solution. I changed root=/dev/hda1 to root=/dev/hdb1 (or
sdb1). The second thing I did was to compile in the drivers for my SATA and
the Ext3 file system into the kernel. Where did you get your
vmlinuz-2.6-xenfrom?

Hth,

Dan

On 10/17/07, Alasdair P Mclean <mcleanap@dcs.gla.ac.uk>
wrote:
>
>  Hey guys, first time install, would appreciate any help.
>
> On booting up the following error occurs: "No filesystem could mount
root,
> tried: ext2. Kernel panic - not syncing: VFS unable to mount root fs on
> unknown-block(0,0)"
>
> Like I say, any ideas very much appreciated. I''ve copied my
menu.lst entry
> for Xen below if it''s any use,
>
> Cheers,
> Ali
>
> grub menu.lst:
>
> title Xen 3.0 / XenLinux 2.6
>   root (hd0,0)
>   module /boot/xen-3.1.gz dom0_mem=262144 noreboot
>   module /boot/vmlinuz-2.6-xen root=/dev/hda1 ro console=tty
>   module /boot/initrd-2.6-xen
>
> _______________________________________________
> Xen-users mailing list
> Xen-users@lists.xensource.com
> http://lists.xensource.com/xen-users
>

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Hey Ali,

I built my domU kernel from Ubuntu sources so I''m not exactly sure what
you
need to do since your sources are from Xen. But I''ll take a guess. If
you go
into your Xen source directory, probably something like /usr/src/xen-3.0.3,
there might be a sub directory called linux-2.6.18-xen. Go to that directory
and try ''make menuconfig''. Then you will need to go to
''File systems'' and
press ''Y'' next to each file system that you want to be
compiled into the
kernel. ''Y'' will compile it in, ''M'' will
compile it as a module and ''N'' will
exclude it from being built. You may need to do the same thing for other
things found in ''Device Drivers'' depending on your hardware
setup.

To be honest, I didn''t know what needed to be compiled in specifically,
so I
just tried a bunch of logical options until it worked. If you have a working
kernel that you can boot the system with, you may want to try running
''lspci'' to get a list of devices such as your IDE, SATA or
SCSI and try to
find a driver that might match that device and compile it in.

Hope this helps,

Dan



On 10/17/07, Alasdair P Mclean <mcleanap@dcs.gla.ac.uk>
wrote:
>
>  Hey Dan,
>
> The vmlinuz-2.6-xen I compiled myself from Xen 3.0.3 source (although I
> have tried the pre-compiled one and it has the same problem).
>
> Could you tell me how I can go about compiling the drivers into the kernel
> please?
>
> Thanks,
> Ali
>
>
>
> -----Original Message-----
> From: Dan VerWeire [mailto:dverweire@gmail.com <dverweire@gmail.com>]
> Sent: Wed 10/17/2007 12:21 PM
> To: Alasdair P Mclean
> Cc: xen-users@lists.xensource.com
> Subject: Re: [Xen-users] Xen Install: "No filesystem could mount root,
> tried: ext2"
>
> Hi Ali,
>
> I had the same error before. I tried two things and I''m not sure
which one
> was the actual solution. I changed root=/dev/hda1 to root=/dev/hdb1 (or
> sdb1). The second thing I did was to compile in the drivers for my SATA
> and
> the Ext3 file system into the kernel. Where did you get your
> vmlinuz-2.6-xenfrom?
>
> Hth,
>
> Dan
>
> On 10/17/07, Alasdair P Mclean <mcleanap@dcs.gla.ac.uk> wrote:
> >
> >  Hey guys, first time install, would appreciate any help.
> >
> > On booting up the following error occurs: "No filesystem could
mount
> root,
> > tried: ext2. Kernel panic - not syncing: VFS unable to mount root fs
on
> > unknown-block(0,0)"
> >
> > Like I say, any ideas very much appreciated. I''ve copied my
menu.lstentry
> > for Xen below if it''s any use,
> >
> > Cheers,
> > Ali
> >
> > grub menu.lst:
> >
> > title Xen 3.0 / XenLinux 2.6
> >   root (hd0,0)
> >   module /boot/xen-3.1.gz dom0_mem=262144 noreboot
> >   module /boot/vmlinuz-2.6-xen root=/dev/hda1 ro console=tty
> >   module /boot/initrd-2.6-xen
> >
> > _______________________________________________
> > Xen-users mailing list
> > Xen-users@lists.xensource.com
> > http://lists.xensource.com/xen-users
> >
>
>

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