Upgrade , fix, or replace readynas nv?

Glad to hear about nfsv4 making it to the sparc boxes. Sounds like most of my concerns about NV have been addressed in future models and that the pro6 might be worth a purchase (even if I just move existing 750GB drives to begin with and later upgrade to newer gen seagate constellation es 3/4GB drives).

That really just leaves a few items to work through. How long to keep the existing NV box going before switching (with there be newer versions of the pro6 released soon?). If I wait up to 1 year, should I bother with trying to reduce fan noise - I actually have a spare noctua fan that has never been used.

Also, I'd feel a lot better with buying whole new readynas if I could get one with at least a single 10Gbps nic, preferably dual. I'm not sure what the plans are for this.

And then, there are just two points about backup tech -- the existing NV is nice for rsync but the cpu on the NV limits it substantially...I assume newer models will be able to sustain much higher throughput, but this might be something worth testing. Not having any kind of dedup is frustrating though...even if it was a software addon...might have to do the dedup on workstation and then rsync data files to NAS, but that would get complicated. Most of the newer linux backup tech use combinations of dedup and snapshots. I can understand though that netgear will be conservative in deploying that though...so I might have to settle for NAS running a few years behind newer linux tech (I see the x86 nas units just started deploying ext4, while fedora is starting to push btrfs, and LWN is reporting on backup software like obnam http://liw.fi/obnam/ ).