Re: kvm-85: virtio-blk not working

["Daniel P. Berrange" <berrange@redhat.com>]

On Thu, Apr 23, 2009 at 11:13:50AM -0500, Anthony Liguori wrote:
> Brian Jackson wrote:
> >Your problem is that index's are per interface type, so both of your 
> >drives should be index=0 since they are different interface types.
> >  
> 
> More specifically, with virtio-blk, you cannot have discontinuous 
> indexes.   In other words, having index=0, index=1, index=2 is valid, 
> but having index=1, index=2, index=4 is not.

Is that restriction going to work with migration ?

eg, you have a VM with 3 disks.  vda, vdb, vdc (index=0, index=1 and index=2).
You then hot-unplug the 2nd disk, vdb (index=1).  Now migrate the guest to 
another machine. I believe you now need to be able to start qemu on the target
host with -incoming and index=0 and index=2, but no index=1 because that 
disk was unplugged. So the indexes would be discontinuous now

Regards,
Daniel
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