We measured the power consumption of the drives both when idle and when under load. We used a random write test with average block sizes of 4 kB and 1 MB as our load test. van 4 kB en 1 MB. The Seagate IronWolf Pro 10 TB is by far the best performing drive in idle. Under load it is anything but economic when it comes to power consumption at a total of 10 watt.