[Xen-users] DomU in it's own LVM partition fails to boot CentOS 5.2 Dom0/U

[Peter Hoose <phoose@xxxxxxxxx>]

I'm trying to do what I think would be relatively simple but can't seem
to make it work. Essentially I want to create several domU's running
CentOS each with it's own LVM partition for increased performance over
image files.

Initially I did a test with image files and
everything went fine, I booted the supplied initrd and vmlinuz images
installed CentOS from http, etc... However, the performance of image
files is pretty slow for what I intend to use this for (Web/DB
servers). So I wanted to do the same thing but in a dedicated
partition. Problem is, when I do this and try to install via http, the
disk doesn't show up in the installer, it just shows a "#". This
appears to be expected when using a dedicated partition and the
solution seems to be to copy an image to my partition and go that
route. I tried this 2 different ways: 1: jailtime image 2: copy of my
dom0 OS. For the jailtime image using the supplied config file with my
disk substituted:

kernel = "/var/lib/xen/boot/CentOS/CentOS_5_x64_vmlinuz"
name = "guest01"
memory = "1024"
disk = [ 'phy:/dev/VolGroup00/guest01,xvda1,w', ]
vif = [ 'bridge=xenbr0', ]
vcpus=1
root="/dev/xvda1"
extra = "fastboot"
>>
I get the following error:

VFS: Cannot open root device "xvda1" 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)

When
I try to copy my own OS the file copy takes forever (only 20G) and my
load average starts creeping up to 3+, which I assume may have to do
with the fact that I'm running cp -ax / /mnt/guest01 which may loop
copying /mnt/guest01 to itself or something similar? Or maybe this is
expected and I'm just impatient :)

Anyways, long story short, is
there a way to install to a partition via HTTP like with disk images?
If not, what am I doing wrong using the prebuilt images?
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