[DRBD-user] xen domU failes to boot from drbd device

Jena Baptiste FAVRE drbd at jbfavre.org
Tue Aug 10 13:43:49 CEST 2010

Note: "permalinks" may not be as permanent as we would like,
direct links of old sources may well be a few messages off.

Are you running HVM DomU ? If Yes, using drbd:resource in your xen 
config file won't work. See: 

In order to use live migration, you must setup DRBD resource to allow 
both side as primary: 

I use it with Debian without any problem ;-)


Le 09/08/2010 17:19, Simon Billis a écrit :
> Hi All,
> I'm running drbd83 Centos 5.5 Xen3.4.3
> I've run into some issues with attempting to use drbd to hold the DomU block
> device. If I use in the xen config drbd:resource instead of phy:resource
> then I am unable to boot the domU. Any ideas why?
> I have found that if I manually set the drbd resource to primary and  use
> the phy:resource syntax in the xen config then all works as one would expect
> (i.e. flawlessly :-) ) except that I am unable to use the live migration
> capabilities without manual intervention. i.e. on the secondary promoting it
> to primary, then issuing a live migration command from the primary, waiting
> for it to complete then demoting the primary to secondary. My understanding
> was that there is a helper script that is in /etc/xen/scripts called
> block-drbd* that should handle this and should also handle the booting of a
> domU. Have I missed something?
> Thanks
> Simon.
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