WD80EFAX 81.00A81 firmware runs hotter


I have a Synology DS1817+ NAS that currently has 8 WE80EFAX drives.

The drives with firmware version 81.00A81 consistently run 4-6 degrees C hotter than the drives with firmware 83.H0A83.

And related to this - which is the “current” firmware and is it possible to update the other drives to this current firmware? It seems like random chance which firmware the drives have - I bought two of these drives a week ago and one drive has the 81.00A81 firmware and the other has 83.H0A83.


Additional information. The drives with the 81.00A81 firmware all have serial numbers beginning VAG, while the 83.H0A83 firmware is in drives with serial numbers beginning 7H or 7S.

Different manufacturing facilities, one of which has an older firmware load?


And even more additional information. Pulling the drives out and looking at them, the drives with serial numbers beginning VAG look like “traditional” WD drives. The 7S & 7H drives look like HGST drives.

And, in fact, the 7S drives have identical power ratings to 7200 rpm HGST drives - 0.4A @ 5V and 0.55A @12V

The VAG drives have power ratings of 0.7A @ 5V and 0.9A @ 12V - nearly double.

And finally, the model numbers are different.

The VAG drives are WR80EFAX-68KNBN0 while the 7S drives are WR80EFAX-68LNPN0

Given the difference in potential power draw (although that’s hopefully maximum power draw) it would seem that different models of WR80EFAX drives pull more power and have higher idle temperatures.

Too bad it’s not possible to order the “low power” drives explicitly. I have 6 of these drives, ordered in pairs from different retailers and I have ended up with 3 of each model.


I bought a 8TB Red HDD WE80EFAX with serial numbers beginning VAG. I use it to replace my WD My Cloud 4TB NAS. It triggered 6 times over-temp Alarm in 3 days (everytime I want to transfer big files). It’s much hotter than any of my 6TB/4TB/3TB Red HDDs.

Really disappointed.


I am having the same exact issue with my WD80EFAX-68KNBN0 with firmware 81.00A81.

For comparison;
1x Seagate Ironwolf 12TB ST12000VN0007: 29c idle
1x Seagate Ironwolf 8TB ST8000VN0022: 35c idle
2x Western Digital 8TB Red WD80EFAX-68LHPN0: 30c idle
1x Western Digital 8TB Red WD80EFAX-68KNBN0: 46c idle <— Not helium anymore?

I know these are rated for 60-65c, but right know my ambient temperature is very cool, around 58f. During the summer this would idle significantly hotter. I don’t even want to know how hot this would get during a raid rebuild. It’s a great space heater, but a horrible NAS drive. WD has made a mistake releasing this to market.


I have the same issue.
2x WD80EFAX-68KNBN0 SN: VAG* - temperature ~50C.
Is it possible to update the firmware to reduce power consumption and temperature?