For the vendor-proprietary "WD IDLE3 timeout", I would do as I have done here, and set it to perhaps 30 seconds. That way, during long idle periods, the drive will save power/heat, and not be unloading the heads too often during busy periods. The default of 8 seconds is just insanity, though.

The wdidle3.exe (1.05) utility works well for that.

There's another utility out there to convert a "regular" drive into a "Raid Edition", and vice-versa. Dunno if it still works on the latest firmwares, though.

Cheers