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[Xen-users] Help needed in installing xen on ubuntu

To: xen-users@xxxxxxxxxxxxxxxxxxx
Subject: [Xen-users] Help needed in installing xen on ubuntu
From: Roopesh <roopesh.raj@xxxxxxxxx>
Date: Sat, 21 Jun 2008 11:32:00 +0530
Delivery-date: Fri, 20 Jun 2008 23:02:36 -0700
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Hi,

I tried installing Xen(xen-3.1.0-install-x86_32.tgz) on ubuntu 7.1 (HP Pavilion dv 6000 core 2 duo laptop). Installation seemed to have completed properly but while booting it throws the following kernal alert and exists.

VFS. Cannot open root device "sda5" or unknown block (0,0)
Please append a correct root='' boot option.
Kernal panic- not synching. VFS: unable to mount root fs on unknown-block (0,0)

In my laptop, I have both windows and linux installed. I am not much familiarity with linux, so I don't whether I have used a wrong root device. I have given below the grub files content, logs generated while installing xen etc. below.

The following is a part of /boot/grub/menu.lst file
===============================
{{
## ## End Default Options ##

title           Xen 3.0 / XenLinux 2.6
kernel          /boot/xen-3.1.gz dom0_mem=262144
module          /boot/vmlinuz-2.6-xen root=/dev/sda5 ro console=tty0


title           Ubuntu 7.10, kernel 2.6.22-14-generic
root            (hd0,4)
kernel          /boot/vmlinuz-2.6.22-14-generic root=UUID=0d1ac86b-8b79-4025-b244-9ed68b160734 ro quiet splash
initrd          /boot/initrd.img-2.6.22-14-generic
quiet

title           Ubuntu 7.10, kernel 2.6.22-14-generic (recovery mode)
root            (hd0,4)
kernel          /boot/vmlinuz-2.6.22-14-generic root=UUID=0d1ac86b-8b79-4025-b244-9ed68b160734 ro single
initrd          /boot/initrd.img-2.6.22-14-generic

title           Ubuntu 7.10, memtest86+
root            (hd0,4)
kernel          /boot/memtest86+.bin
quiet

### END DEBIAN AUTOMAGIC KERNELS LIST

# This is a divider, added to separate the menu items below from the Debian
# ones.
title           Other operating systems:
root


# This entry automatically added by the Debian installer for a non-linux OS
# on /dev/sda1
title           Windows Vista/Longhorn (loader)
root            (hd0,0)
savedefault
makeactive
chainloader     +1


# This entry automatically added by the Debian installer for a non-linux OS
# on /dev/sda3
title           Windows Vista/Longhorn (loader)
root            (hd0,2)
savedefault
makeactive
chainloader     +1

}}


The following is the log message when I  installing xen
========================================
{{
root@advaith:/home/roopesh# cd xenapp/dist/
root@advaith:/home/roopesh/xenapp/dist# sh ./install.sh
Installing Xen from './install' to '/'...
 - installing for udev-based system
 - modifying permissions
All done.
Checking to see whether prerequisite tools are installed...
Xen CHECK-INSTALL  Tue Jun 10 00:26:00 IST 2008
Checking check_brctl:
 *** Check for the bridge control utils (brctl) FAILED
Checking check_crypto_lib: OK
Checking check_iproute: OK
Checking check_libvncserver: unused, OK
Checking check_python: OK
Checking check_python_xml: OK
Checking check_sdl: unused, OK
Checking check_udev: OK
Checking check_zlib_lib: OK
All done.
}}


After installing, the /boot/ dir has the following contents
========================================
{{
root@advaith:/boot# ls

abi-2.6.22-14-generic    
grub                             
memtest86+.bin               
vmlinux-syms-2.6.18-xen   
vmlinuz-2.6-xen  xen-3.gz
config-2.6.18-xen        
initrd.img-2.6.22-14-generic     
System.map-2.6.18-xen        
vmlinuz-2.6.18-xen        
xen-3.1.0.gz    
xen.gz
config-2.6.22-14-generic 
initrd.img-2.6.22-14-generic.bak 
System.map-2.6.22-14-generic 
vmlinuz-2.6.22-14-generic 
xen-3.1.gz      
xen-syms-3.1.0
}}


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