NETGEAR READYNAS ULTRA 4 with WD30EZRX

Wondering about the same.

My guess is it is supported;
They are somewhere sold together;
http://www.pclan.com.au/ctg-servers/ctg-nas-server/netgear-readynas-ultra-4-12tb-4x-wd-3tb-green-wd30ezrx-nas-network-storage-4-bay-rndu4000-p-n-rndu4000-4x-wd30ezrx.html

Since these drives are not on the supported list, Netgear will not provide support for them. This doesn't mean they wont work. It just means Netgear may ask you to remove them from your ReadyNAS if they think they are the cause of a problem. From the link j0ker provided it looks like there is at least one company confident that they do work. I would be very cautious anytime you are looking at getting drives not on the supported list especially green drives which don't tend to handle the stress of a raid well.

We have this model in-house. So far it has only been qualified on the NV+/Duo v2 models. The Ultra/Pro series is next for testing, but I can't give an ETA.

Good to know! Here is hoping the testing goes well.

I use one EZRX in my Ultra4, works like a charm, but it gets Load Cycle Count like crazy (got 180000 LCC in 6 months, around 1 per minute). Since then, i have tweaked the WD idle head parking (default at 8s inactivity) at 254s, so far so good (but tweaking isn't really business friendly).