[SOLVED]ReadyNas Duo v1 on-disk raid format vs. linux mdraid

Thanks once again for exhaustive answers. So, yes, accordingly to the info in the "guide on topic", this box is really Duo v1 and not Duo v2. As for warranty matters - hadn't had a chance to investigate if the box itself is really bricked yet. The only things I had been provided with so far are HDDs as the info recovery was the main thing that my relative had been interested in. I wonder why hadn't he been using mirrored raid for "such a valued stuff" he had been storing on the NAS, but that's an offtopic question really which can lead to a lengthy discussion about people carelessness.

As for RMA - the box had been bought brand-new, but chances are good that I wouldn't be able to RMA it due to the specifics we have here in Russia when dealing with warranties. As far as I have heard, NETGEAR haven't got dedicated office in Moscow, so the only place we would be able to query about the warranty is a retail computer store where this box had been bought - and RMA success rate for such cases is far less than 100%, as long as my experience tells.

Anyways, thanks once again for quick answers and help, would try to proceed with data recovery on this weekend.