How to Turn Off Hard Disk After Idle in Windows 10
The "Turn off hard disk after" power option lets users set to have hard disks (HDD) power down after a specified time of HDD inactivity is detected. This will not affect a SSD (Solid State Drive).
Having your HDDs automatically turned off after being idle can help save energy and extend a PC's battery life.
When you or anything tries to access a HDD that has been turned off, there will be a delay of a few seconds as the HDD automatically spins back up and is turned back on before being able to access it.
This tutorial will show you how to turn off hard disks after being idle for specified minutes or to never in your power plan in Windows 10.
If you have set to turn off hard disk after idle, then you will experience a delay if you restart explorer since you will have to wait for all disks turned off to spin back up and turn on before explorer is restarted.
What I found here was I could go into the advanced settings for each power plan option including creating your own custom plan and change the hard drive setting from the default 20 minutes in Balanced for example to never as well as having the display set to never in each plan and click on the save changes option when exiting. I found that out in previous versions before 7 even where the defaults would end up being reset if I saw any unexpected hard boots when a program locked and the display would turn off after being set to remain on all the time.
The only thing involving the system registry as far as power plans go was backing the registry settings for the plan selected. You don't want to be going into the registry otherwise when not necessary to make changes there. The power plan scheme was what was backed up on previous versions. That had been the "power.cfg -export C:" command to make a back up copy of the present power plan that was applied.
It would interesting to find out if the same type of command will work for 10. That had been the "default.pow" file. The reverse could also be seen by importing the default plan if you found the settings had returned to their defaults for some reason. That of course would include the setting for the hard drive never or turn off after so many minutes option it was set for. As far as each individual plan you can still make the changes in setting by going into the Advanced settings as the guide here shows.
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