Kernel panic - not syncing: VFS: unable to mount root ...... Re: [Xen-users] xen on a remote computer, installing virtual machines without cds

["Sueveges Gyoergy" <georg@xxxxxxxxxxxx>]

Hi

 Thnx for everybody`s help on subject of installing xen on remote  
computer. I decided to make a home installation first of all  as a  
reproduction of remote system (with suse 9.3 with lilo, fs: resiserfs),  
and only when everything works fine I will try to install it remotely.
I could already migrate to grub from lilo (Yast could do this), and  
install the xen rpm-s from yast ( since I`m not a linux expert :)
Unfortunetely the yast doesnÂt make any entry into the menu.lst of grub.  
So I had to insert the title xen manually. And it doesn`t work. When  
booting Igot kernel panic:
 kernel panic - no syncing: VFS: Unable to mount root fs unknown block(0,0)

But I followed the instructions in the xen doc, so I now have the  
following entries in menu.lst:
timeout 8
hiddenmenu
default 0

title Xen 2.0 / XenLinux 2.6
    kernel (hd0,6)/boot/xen.gz dom0_mem=131072 noreboot
    module (hd0,6)/boot/vmlinuz-xen root=/dev/hda7 selinux=0  
resume=/dev/hda6 showopts console=tty0
title SUSE_LINUX_9.3
    kernel (hd0,6)/boot/vmlinuz root=/dev/hda7 vga=0x31a selinux=0  
splash=silent linux26 resume=/dev/hda6 showopts
    initrd (hd0,6)/boot/initrd
....

I also tried only with the parameters written in the xen doc (no selinux,  
resume, showopts).
When I insert initrd-xen (module (hd0,6)/boot/initrd-xen) too, then it  
says, that kernel should be loaded first.
Maybe it doesnÂt recognize the reiserfs file system? What could be done? I  
saw in the archive that someone had similar problem with DevFS, but I  
don`t think that it is also a solution for me.
Since I`m not a linux expert, Maybe may the problem is a very basic  
problem?
Which way should I go? Thnx for your help in advance :)

Best Regards
 George






On Sat, 1 Oct 2005 22:37:29 -0400, CLIFFORD ILKAY  
<clifford_ilkay@xxxxxxxxxxx> wrote:
> On September 28, 2005 18:25, Sueveges Gyoergy wrote:
> > Hi All,
> >
> >   I have just downloaded xen. We rent a computer with suse 9.3
> > (1000km from here, access with ssh2). I'd like to install 2 virtual
> > machines (both with suse), of course without CD or floppy (due to
> > distance). So I have no X and no CD. In this case what can be the
> > best way to install xen, and the virtual machines?
> >
> > Thnx
> >   George
> >
> > ps: As I see in the documentation, xen can be configured only with
> > grub. I have lilo, so xen with lilo is not possible?
> What you are trying to do is fraught with dangers. It is not
> impossible but one minor mistake and you will have no remote access.
> I have done a remote server installation with no remote hands but it
> was not easy. I had a means of power cycling the server and
> specifying PXE boot on the next boot. I could then attempt to fix the
> problem on the previous boot from the hard disk though it was not
> always obvious what the problem was. If the problem was before
> syslogd started, there would be no indication of it in the logs. It
> took some trial and error to get it working but I eventually got it
> working.
>
> Make sure to include kernel modules for your hardware and filesystems.
> I built my dom0 and domU kernels as monolithic kernels and disabled
> support for module loading.
>
> Some (many?) colocation facilities assign static IPs via dhcp. I got
> bitten by this once when this possibility did not occur to me until I
> had the provider reimage the drive of the server with their custom
> Red Hat distro. Once I realized that their installation was getting
> its IP via dhcp, I made the necessary change to my installation of
> Mandrake and I was off to the races. In your case, you already have a
> working installation so you should be able to use that as a point of
> reference.
>
> Once you have the kernel booted, be very careful with iptables rules.
> You can easily lock yourself out. Until you get this sorted out, you
> might want to specify one IP address that you have access to, not
> necessarily the one that you are using for the remote configuration
> and testing, for which everything is allowed.


--
Using Opera's revolutionary e-mail client: http://www.opera.com/m2/

_______________________________________________
Xen-users mailing list
Xen-users@xxxxxxxxxxxxxxxxxxx
http://lists.xensource.com/xen-users