[Xen-users] Error: Device 2049 (vbd) could not be connected. Backend device not found.

[Arsen Hayrapetyan <ahairape@xxxxxxxxxxxx>]

Hello,

I am getting the following error when trying to start domU with
'xm -c /etc/xen/xmdefconfig':

======================================================
Error: Device 2049 (vbd) could not be connected. Backend device not found.
======================================================

My /etc/xen/xmdefconfig contains the following line:

======================================================
disk = 
['phy:/dev/vg/compnode,sda1,w','phy:/dev/vg/compswap,hda3,w','phy:/dev/vg/modules,sda2,r']
======================================================

When I do 'lvscan', I get the following:

======================================================
  inactive          '/dev/vg/compnode' [14.00 GB] inherit
  inactive          '/dev/vg/compswap' [1.00 GB] inherit
  inactive          '/dev/vg/modules' [100.00 MB] inherit
======================================================

And also one strange thing... Though 'xm' is giving the error above,
when I run 'xm list' it shows the domain started, but paused:

=======================================================
Name                              ID Mem(MiB) VCPUs State  Time(s)
Domain-0                           0      219     1 r-----   772.7
compnode                           6      512     1 --p---     0.0
=======================================================

If now I doing 'xm console 6', it stucks...
If I do 'xm unpause 6', it unpauses:

======================================================
Name                              ID Mem(MiB) VCPUs State  Time(s)
Domain-0                           0      219     1 r-----   783.0
compnode                           6      512     1 ------     1.3
======================================================

But after few seconds I see the compnode, having ID=7 !
And finally it disappears:

#> xm list

======================================================
Name                              ID Mem(MiB) VCPUs State  Time(s)
Domain-0                           0      219     1 r-----   788.5
======================================================

Can anybody explain what is going on here?

Thanks in advance,
Arsen.

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