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

[Tait Clarridge <tait@xxxxxxxxxx>]

On Tue, 2011-09-13 at 16:42 +0200, Sebastian Biedermann wrote:
> 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!!!
> 

Try adding the following to /etc/modprobe.conf :

options loop max_loop=256
 



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