> I'm guessing KVM hypervisor? Yes, KVM hypervisor. Sorry for the omission.
> If so, I had this problem and was related to > some libvirt cache, I had to reboot the VM in order to be able to use the > disk. Well not reboot, stop and start actually. I tried starting and stopping the machines several times and no dice. Also, adding disks on the fly and with the machines stopped. Thanks for the tip though.
