[Xen-users] Problems booting domU from lvm with multiple LV's

[Jai <awayatm@xxxxxxxxx>]

Hi,

I'm having difficulty understanding why my domU image will not boot  
if there are more than 1 disk device from the same LVM volume group  
allocated to a domU.
For example:
The basic diagram below tries to show how my disk stacking is setup.
------------------------
|       /       |  /usr     |
------------------------
|          domU         |
------------------------
|   xvda1 |  xvda2 |
------------------------
|   LV1     |   LV2   |
------------------------
|            LVM          |
------------------------
|      /dev/drbd0     |
------------------------
|       /dev/sda1      |
------------------------
For some reason creating a domU in this configuration results in a  
message;
"Error: Device 51729 (vbd) could not be connected. Hotplug scripts  
not working. "
in the logs there are entries with;
"[2008-07-23 14:51:58 xend 8058] DEBUG (blkif:24) exception looking  
up device number for xvda1: [Errno 2] No such file or directory: \047/ 
dev/xvda1\047"
"[2008-07-23 14:51:58 xend 8058] DEBUG (blkif:24) exception looking  
up device number for xvda2: [Errno 2] No such file or directory: \047/ 
dev/xvda2\047"
But if I boot a domU with only 1 logical volume assigned to the domU  
(see diagram below) the VM boots without problems.
-------------
|        /       |
-------------
|   domU  |
-------------
|   xvda    |
-------------
|   LV1     |
------------------------
|            LVM          |
------------------------
|      /dev/drbd0     |
------------------------
|       /dev/sda1      |
------------------------

I have trolled the net looking for some answers but none seem to  
provide one. Any help on what may be the cause would be greatly  
appreciated. I can provide config examples if that will help, but at  
this stage I'm thinking it may be a bug and not wrong configuration.  
I may be wrong though :)
Thanks.

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