On Thu, Jul 19, 2012 at 8:26 AM, Sébastien Han <han.sebastien@xxxxxxxxx> wrote: > Ok I got your point seems logic, but why is this possible with LVM for example? > > You can easily do this with LVM without un-mounting the device. Do your LVM volumes have partition tables inside them? That might be the difference. Of course, you can put your filesystem straight on the RBD; that would be a good experiment to run. -- To unsubscribe from this list: send the line "unsubscribe ceph-devel" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html