What does 100 % disk usage mean in Windows 10? [duplicate]
In the task manager of Windows 10, I see this:
What does 100 % disk usage mean in Windows 10? How is the disk usage percentage calculated?
I am particularily confused by the first graph showing a constant percentage at 100 %, while the second graph shows read and write rates that vary.
The data come from the disk controller (Microsoft explained it in the video at 6m55 seconds). The disk controller tells Windows that the drive is busy and Windows displays it in the taskmanager graph. The Seagate drive is slow, replace it with a SSD.