I have an SSD as primary drive where Antergos is installed on. I have a second drive, an HDD, which contains some bigger data which is only accessed when needed. The thing is that this secondary disk doesn’t go to sleep after some time of inactivity in Antergos. In Windows it does go to sleep after X minutes.
I found something about hdparm on the Arch wiki. To enable the sleep/spin down feature after 20 minutes, I’d have to install hdparm and use this command:
sudo hdparm -S 240 /dev/sdc
Is this the correct and safe way to do this? Will this setting also be remembered by the OS?