The "RED" drives you see on the market are no different from standard hard drives, except their firmware will give up trying to recover such a read error after just a few seconds, before low end RAID systems have a chance to kick the drive out due to unresponsiveness.
It's called TLER. And fuck WD for segmenting this market. On some of their older drives (raptors), there used to be firmware setting to enable/disable TLER. I'm pretty sure Hiatchi (IBM) drives still makes this user selectable. Yes, WD is on my personal shit-list of drives not to buy.