HDD keeps restarting, why?

Question

Hard disks

After installing the SSD, the HDD ceased to be a system one, and from time to time it turns off and starts again, is it normal?

Answer 1

This is a power saving shutdown.
It can be turned off in the power plan settings in Windows settings.

Answer 2

sleep mode on the disk, in general, a good thing when you rarely use the disk, it does not make noise at this moment.
if the clicks are constant, then either turn it off or find someone who climbs the disk and turn it off.