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Yes, there are about 100 atoms of air between the read/write head and the platter. That's a 15nm gap and you can buy them at your local supermarket!!! How do Hard Disk Drives Work Also, I have found a solution: I turn my NAS off whenever I'm not home and sleeping.

Electricity prices are crazy. I calculated that leaving 2 HDD's off for 16 hours per day will save me enough for either one 2kg chicken or 1kg of cheese. I really need to know how to turn on HDD power down.

I'm using TrueNAS 24.10.1. Can't seem to find the setting for SMART APM. Ideally I want to set Level 64.