[Xen-users] change file: to tap:aio

[Sebastian Biedermann <biedermann@xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx>]

Dear List,

I try to start a guest instance on hardware node-2 and the image is 
located on hardware node-1.
The plan is to do live migration between the two nodes in later steps.
For this, I configured a NFS server on node-1 dom0 which provides the 
image and I mount the filesytem on dom0 node-2.
I found out, that booting the instance remotley on node-2 using

disk = ['file:/xen/XenGuest1.img,xvda1,w', 'file:/xen/XenGuest1.swap,xvda2,w']

in the cfg file is not working, because I have to use 'tap:aio:' instead 
of 'file:'
I can boot the instance locally on node-1 using the 'file:' 
configuration, but not remotely on node-2.
If I do, I get the error during the boot process on node-2: 'Device 
51714 (vbd) could not be connected losetup /dev/loop  failed'
I was not able to find out what is going on there or to fix this (there 
are enough free loop devices).
Accordingly, I changed the cfg file to:

disk = ['tap:aio:/xen/XenGuest1.img,xvda1,w', 
'tap:aio:/xen/XenGuest1.swap,xvda2,w']

But now, I cannot boot it locally and also not remotley. The boot 
process hangs with the Error:
XENBUS: Waiting for devices to initialise: 295s...

Can anyone please give me advice?
Thank you!!!

--
Se


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