Upgrade , fix, or replace readynas nv?

To exapand a bit on mdgm's description of the "button" on newer trays. On your trays, the round button pressed a lever that pressed down on the release for the latch. On the new trays there is a rectangular recess you put your finger tip in and then press down directly on the release. I have yet to hear of one sticking. (I have two older NVX units (32bit x86 vs the current 64bit x86 models) which was the first for this type of release).

I was also concerned (as I'm sure a lot of people were) when Netgear bought out Infrant in 2007 (shortly after I bought an NV+) but in this case it was a blessing for the consumer. They vastly expanded the offerings and now have 11 different desktop ReadyNAS models available vs the 1 when you bought your NV. There are 4 different 2 bay models, 4 different 4 bay models and 3 different 6 bay models. The Pro 6 that mdgm recommended is one of if not the most powerful desktop NAS at this time. But as in anything, the power comes with a price tag. Roughly $1000 for a diskless model delivered. Considering the features and power compared to your NV and it's price its a reasonable price. Then there is the 5 year warranty as well. You can save about $80 by going to the Ultra 6 plus, but it only has a 3 year warranty and lacks the business features but still has iSCSI.