[Xen-users] amd64 dom0 kernel panic

[Bryan Brown <kasper22@xxxxxxxxxxxxxxx>]

Hi all,

I'm having some trouble getting xen 3.0.2 setup on my AMD 64 running 
Ubuntu.  I've been digging through google, but haven't had any luck 
finding an answer.  I tried using the pre-compiled bin first, but since 
I have nvidia sata it didn't work and crashed right away.  So I 
recompiled using the linux-defconfig_xen0_x86_64, marking 'y' for the 
SATA_NV option. 

I rebuilt the kernel installed everything and tried to boot again.  Now 
it can see the nvidia sata but when it tries to mount the system on root 
it fails with this message:
Kernel panic - not syncing: VFS: unable to mount root fs on 
unknown-block(8,1)
here is my setup for grub:
title           Ubuntu, kernel 2.6.12-10-amd64-generic Default
root            (hd0,4)
kernel          /vmlinuz root=/dev/sda1 ro quiet splash
initrd          /initrd.img
savedefault
boot

title           Ubuntu, kernel 2.6.12-10-amd64-generic Default (recovery 
mode)
root            (hd0,4)
kernel          /vmlinuz root=/dev/sda1 ro single
initrd          /initrd.img
boot

title           Ubuntu, memtest86+
root            (hd0,4)
kernel          /memtest86+.bin
boot

### END DEBIAN AUTOMAGIC KERNELS LIST
title           Xen 3.0 / XenLinux 2.6.16
root            (hd0,4)
kernel          /xen.gz dom0_mem=512M noreboot
module          /vmlinuz-2.6-xen0 root=/dev/sda1 ro console=tty0

ls -l /dev/sd* :
brw-rw----  1 root disk    8,  0 2006-04-27 19:21 /dev/sda
brw-rw----  1 root disk    8,  1 2006-04-27 19:21 /dev/sda1
brw-rw----  1 root disk    8,  2 2006-04-27 19:21 /dev/sda2
brw-rw----  1 root disk    8,  3 2006-04-27 19:21 /dev/sda3
brw-rw----  1 root disk    8,  4 2006-04-27 19:21 /dev/sda4
brw-rw----  1 root disk    8,  5 2006-04-27 19:21 /dev/sda5
brw-rw----  1 root disk    8,  6 2006-04-27 19:21 /dev/sda6
brw-rw----  1 root disk    8,  7 2006-04-27 19:21 /dev/sda7
brw-rw----  1 root disk    8, 16 2006-04-27 19:21 /dev/sdb
brw-rw----  1 root disk    8, 17 2006-04-27 19:21 /dev/sdb1
brw-rw----  1 root disk    8, 32 2006-04-27 19:21 /dev/sdc
brw-rw----  1 root disk    8, 33 2006-04-27 19:21 /dev/sdc1
brw-r-----  1 root plugdev 8, 48 2006-04-27 19:21 /dev/sdd
brw-r-----  1 root plugdev 8, 64 2006-04-27 19:21 /dev/sde
brw-r-----  1 root plugdev 8, 80 2006-04-27 19:21 /dev/sdf
brw-r-----  1 root plugdev 8, 96 2006-04-27 19:21 /dev/sdg


Any ideas what I might be missing that would be causing this problem?

Thanks
Bryan



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