This is working for me. Could you try umounting the raid volume, so that /mnt/store is just on your / partition, and see if it succeeds then?
Otherwise, to give us more information, please (with the raid volume again mounted) re-try creating the vm, and then do apport-collect 915429 ** Changed in: libvirt (Ubuntu) Status: New => Incomplete -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/915429 Title: directory based pool not working across mount points To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/libvirt/+bug/915429/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs