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[Xen-users] debian lenny -> squeeze domU migration /dev/sdaX not found

I'm migrating a Lenny/2.6.26-1 kernel non-lvm file based DomU to a new
Squeeze Dom0 server (non-lvm hardware RAID1 sdX) running kernel
2.6.32-5-xen-amd64, xen-hypervisor-4.0-amd64, xen-tools 4.2-1. When I do

xm create whatever.domain.com.cfg

it starts, but then when I login with xm console I get:

Begin: Loading essential drivers ... done.
Begin: Running /scripts/init-premount ... done.
Begin: Mounting root file system ... Begin:
Running /scripts/local-top ... done.
Begin: Waiting for root file system ... done.
Gave up waiting for root device.  Common problems:
 - Boot args (cat /proc/cmdline)
   - Check rootdelay= (did the system wait long enough?)
   - Check root= (did the system wait for the right device?)
 - Missing modules (cat /proc/modules; ls /dev)
ALERT!  /dev/sda2 does not exist.  Dropping to a shell!
BusyBox v1.17.1 (Debian 1:1.17.1-8) built-in shell (ash)
Enter 'help' for a list of built-in commands.
/bin/sh: can't access tty; job control turned off

apparently it can't find /dev/sda2, which is specified in
whatever.domain.cfg as:

root        = '/dev/sda2 ro'
disk        = [


along with updated kernel entries like:

kernel      = '/boot/vmlinuz-2.6.32-5-xen-amd64'
ramdisk     = '/boot/initrd.img-2.6.32-5-xen-amd64'
#kernel      = '/boot/vmlinuz-2.6.26-1-xen-amd64'
#ramdisk     = '/boot/initrd.img-2.6.26-1-xen-amd64'


/home/xen/domains/whatever.domain.com/disk.img and swap.img

exist and have the same ownership/permissions as a newly created
(successful) DomU on this same box using Debian Squeeze xen-tools, which
is working fine.

why can't the old DomU see /dev/sda2
as /home/xen/domains/whatever.domain.com/disk.img ? Is there something I
can edit at xm console inside DomU to make it see those .img's? I've
tried mount, but don't see the fs, and fdisk -l doesn't work.


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