Re: [Fedora-xen] VFS: Cannot open root device "sda1" or unknown-block(0, 0)
On 10/11/07, Eduardo Habkost <ehabkost(a)redhat.com> wrote:
On Thu, Oct 11, 2007 at 10:43:22AM -0700, Haifeng He wrote:
> Hi, All
>
> I followed the steps in Fedora7VirtQuickStart to install Xen on Fedora 7.
> I downloaded couples of file system image from http://jailtime.org/. However,
> every time I tried to create guest OS using those file system image, I got error
> messages:
>
> VFS: Cannot open root device "sda1" or unknown-block(0,0)
> Please append a correct "root=" boot option
> Kernel panic - not syncing: VFS: Unable to mount root fs on unknown-block(0,0)
>
> An example of Xen configure is:
>
> kernel = "/boot/vmlinuz-2.6.20-2936.fc7xen"
You don't have a initrd image that contains the block device and
filesystem modules.
I expect the images you have downloaded have a valid grub configuration
inside it. If they have it, you can use:
bootloader = "/usr/bin/pygrub"
Instead of specifying a kernel that is outside the disk image. Pygrub
will be able to read grub configuration and kernel/initrd images from
inside the disk image.
Thank you for your reply. I tried to include bootloader = "/usr/bin/pygrub"
in my configuration but I got an error message "Error: Boot loader
didn't return any data!".
I was able to boot the same image on a Ubuntu system with Xen
installed from source.
Do I need to do something special on Fedora-Xen? Or there is a way that I
can add block device and filesystem modules into the initrd image?
Thanks
Haifeng
--
Eduardo