ReadyNas NV+ v2 Booting & 'fault disk' problem - PLEASE HELP (8+ yrs of data/work at risk)

If you're concerned about risk (which is always present in anything you do), then you should consider cloning your drives before letting anyone review it.

If you're unable to clone and make copies of your hard drives, then you have very limited options for recovery as it is. 

Regardless of any action taken by you, the community, or NETGEAR Support experts, you still need to get your data for which you failed to make a backup. I suggest that you see the amount of people responding as an olive branch and do make a good faith effort on your part to accomodate the need for basic information to understand your situation. 

As long as your unit is in tech support mode, there's no reason why the ReadyNAS will take action on your drives; however, since I have no idea what the state of your drives are in, if you do approach a professional recovery service, they would likely charge your an averaged $500 per drive clone before they even attempt to try anything. 

I suggest you review NETGEAR's scope of support for Data Recovery (http://kb.netgear.com/app/answers/detail/a_id/69) to understand what is covered for you and the cost is very reasonable compared to any other vendor.