ReadyNAS primary disk replication hanging

Thanks StephenB. Great advice on the direct connect - I decided the simplest way would be to reconnect through my router. As soon as I did I could ping the duo. Then I clicked setup, got a complaint from Firefox that the certifcate wasn't trusted, ignored all that and got through to where a dialog appeared: "A username and password are being requested by https://10.0.0.17. The site says: "Control Panel". So I clicked cancel so I could google what the default username/password is. I can't remember changing the pswd, but I could have just as easily. Found out that it's 'admin' and 'netgear1', so I tried the setup button from RAIDar again, but this time it just gave me a blank browser window and didn't prompt for a username/password at all. Tried the URL https://10.0.0.17/admin/ in Safari, Chrome - same issue. So I rebooted my iMac, tried again - same issue. So I tried a graceful shutdown of the duo (using the Duo v1 hardware manual) wouldn't shutdown, so I pulled the plug in frustration. And then restarted it. After a while it came up, and now it is reporting the following:

Volume: Yellow indicator, "RIAD level X, Not redundant: A disk failure will render this volume dead"
Slot 1 disk: Yellow indicator, "Channel 1, Seagate ...dead"
Slot 2 disk: Green indicator, "Channel 2, Seagate... 188 ATA errors."

I tried the 'Setup' button again in RAIDar, this time I again got the 'untructed connection' thing, worked my way thorugh the add exception screens and got to the username/password prompt. I tried the default - admin, netgear1 - no good. Then I tried the 46 passwords that I have to use to get by in 2013 and none of them worked. So I feel I'm at the firmware reset stage...?

Btw, to get the duo version, I read the sticker underneath the unit which said v2 (picture here: http://apwfc.com.au/netgear-readynas-issue/). But after your comment I searched for more information and found this thread - http://apwfc.com.au/netgear-readynas-issue/ - where mdgm posted:

mdgm wrote:
No. The RND2000-200 is the v2. The v2 will show it has RAIDiator 5.3.x under the Info (far right) column in RAIDar. The v1 shows that it has RAIDiator 4.1.x under the Info (far right) column in RAIDar.

Thanks mdgm for updating my signature. Not sure why the sticker would say v2 though...