* Jon:
The ceph package in Debian has been a mess until very recently
Really? I have no problems with ceph. Until I upgraded to 13.10, I was using the opscode ppa; there are no 13.10 repis I'm the ppa...
The package in Debian/unstable had release-critical bugs (failed to build on several architectures) that nobody bothered to fix before wheezy was released. The package was stuck as 0.47-something forever and was only recently upgraded to a current version.
It's funny you should say that. I can't for the life of me get qemu-img to create firmat 2 rbd images... but I think that may be a ceph config problem, not an issue with qemu/kvm.
Are qemu-system-x86-64 and qemu-img linked against the relevant libraries (librbd or something) on your system? Cheers, -Hilko