On 09/03/2018 04:52 PM, Zdenek Kabelac wrote: > > I assume there is already some RFE to provide such support - in terms of > existing limitation that you need to always prepend whole 'extent' (so i.e. > with 4MiB extent size - you need to prepend at least 4MiB) Here it goes: https://bugzilla.redhat.com/show_bug.cgi?id=1609189 Regards O.