I have two WD10EZRX in two separate pc’s. I know the operating range is 0 - 60 degrees C, but what is the optimal operating temperature?
Maybe you should try contacting WD’s Technical Support about this. You can do so either by phone or email.
To Contact WD for Technical Support
All manufacturers test and design drives for a specific temperature range and the drives should work fine as long as they are in that range.