Xen users - Jan 2006 - Error: Device 2049 (vbd) could not be connected. Backend device not found.

Hi,
i have seen a post with the same title, but didn''t
help a lot -it mentioned, that the image was for LVM,
which i don''t think is my case.
I downloaded the debian31 image from
http://jailtime.org. Initially, i had some problems
and changed the configuration file a little. Here it
is now:
-----------
kernel = "/boot/vmlinuz-2.6-xenU"
memory = 256
name = "debian.3-1"
nics = 1
#dhcp = "dhcp"
disk [''file:/mnt/store2/xen/debian/debian31.img,sda1,w'']
root = "/dev/sda1"
-----------
However,

vakhos:/mnt/store2/xen/debian31# xm create -c
debian.3-1.xen.cfg
Using config file "debian.3-1.xen.cfg".
Error: Device 2049 (vbd) could not be connected.
Backend device not found.

Ideas? Thanks






		
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On Wed, 04 Jan 2006 22:19:57 +0000, Konstantinos Pachopoulos wrote:
> Hi,
> i have seen a post with the same title, but didn''t
> help a lot -it mentioned, that the image was for LVM,
> which i don''t think is my case.
> I downloaded the debian31 image from
> http://jailtime.org. Initially, i had some problems
> and changed the configuration file a little. Here it
> is now:
> -----------
> kernel = "/boot/vmlinuz-2.6-xenU"
> memory = 256
> name = "debian.3-1"
> nics = 1
> #dhcp = "dhcp"
> disk >
[''file:/mnt/store2/xen/debian/debian31.img,sda1,w'']
> root = "/dev/sda1"
> -----------
> However,
> 
> vakhos:/mnt/store2/xen/debian31# xm create -c
> debian.3-1.xen.cfg
> Using config file "debian.3-1.xen.cfg".
> Error: Device 2049 (vbd) could not be connected.
> Backend device not found.
> 
> Ideas? Thanks
> 
I''m assuming you are using Xen-3.0? I''ve found that if this
error occurs
you can change the backend devices and boot (once again) but that once the
domU shutdowns down, those backend devices are no longer available.

You can continue to run through a large potential list of backend devices
but if you are doing a lot of create/destroy sequences you''ll
eventually
run out.

Cheers,
Anand


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I get this same error on boot (link to config is in /etc/xen/auto). How could
the backend device work before I rebooted (starting the domain by hand), and
then not be available after I reboot (either auto or by hand)?


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