ReadyNAS 314 - a year of hell and now lost 10years of data!

I believe that sct erc just lets you adjust the timeouts for error recovery. As long as the default behavior for the drive is within the timing that RAID needs to recover from a sector error then the drive can still be fine. I really think your problem is crappy product out of seagate, it's hard to conclude anything but that. If you found that the drives were getting kicked out but they were still very usable then this SCT ERC thing might be an issue and netgear to blame, but your drives have been toast. No amount of retries and recovery can overcome that. The camera is another story though. If they said compatible and it's not you should get your money back. FWIW Hitachi includes ERC even in their desktop drives, seagate only includes it on their enterprise class as far as I know.