Why does the hard drive sometimes turn off?

Question

Iron

I will not speculate, I will describe what I noticed.
Periodically, the system slows down for a few seconds, freezes.
At this time, a sound is heard from the system unit, similar to the spinup of a hard disk (small whistle) b lasts 1-1.5 seconds. After that everything hangs.
What is it and why?)

Answer 1

If you have Windows, then in the power options there is an item (in the advanced settings) where it is indicated after what time to turn off the hard drive.

Answer 2

the drive stops the engine and parks the heads when idle for a long time to reduce noise and power consumption. this behavior can be disabled in the same crystaldiskinfo (as far as I remember)

Answer 3

Keep valuable data. Replace disk.