[Xen-users] Problems intalling xen 3.1 on slackware 12

["Dario Hernan" <slacker.ar@xxxxxxxxx>]

Hello all, I've installed xen 3.1 on slackware 12 and I have a problems
with xen kernel boot.

I installed it with this steps.

make world
make install

this is the menu.lst of grub
# Other bootable partition config begins
  title Windows on (/dev/sda1)
  rootnoverify (hd0,0)
  makeactive
  chainloader +1
# Other bootable partition config ends
# Linux bootable partition config begins
  title Linux on (/dev/sda3)
  root (hd0,2)
  kernel /boot/vmlinuz root=/dev/sda3 ro vga=normal
#Linux XEN (I added it)
    title Xen 3.0 / XenLinux 2.6
    root (hd0,2)
    kernel /boot/xen-3.1.0.gz
    module /boot/vmlinuz-2.6-xen root=/dev/sda3 ro
    #module /boot/initrd-2.6-xen.img

but when I boot with xen kernel appear this error...

VFS: cannot open root device "sda3" or unknown-block (0,0)
please append a correct "root=" boot option
kernel panic - not syncing: VFS: unable to mount root fs or  unknown-block (0,0)

This is the output of ls in /boot
root@Slack:/boot# ls
README.initrd@                       initrd-tree/
System.map@                          initrd.gz
System.map-2.6.18-xen                map
System.map-generic-2.6.21.5          vmlinux-syms-2.6.18-xen
System.map-generic-smp-2.6.21.5-smp  vmlinuz@
System.map-huge-2.6.21.5             vmlinuz-2.6-xen@
System.map-huge-smp-2.6.21.5-smp     vmlinuz-2.6.18-xen
boot.0800                            vmlinuz-generic-2.6.21.5
boot_message.txt                     vmlinuz-generic-smp-2.6.21.5-smp
config@                              vmlinuz-huge-2.6.21.5
config-2.6.18-xen                    vmlinuz-huge-smp-2.6.21.5-smp
config-generic-2.6.21.5              xen-3.1.0.gz
config-generic-smp-2.6.21.5-smp      xen-3.1.gz@
config-huge-2.6.21.5                 xen-3.gz@
config-huge-smp-2.6.21.5-smp         xen-syms-3.1.0
diag1.img                            xen.gz@
grub/


Does anyone help me!?
Thanks in advance!
Dario

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