When shutting down PC, all mechanical hard-disks run down hard

On my side the Odroid shutdown script fixed the issue: odroid-xu4:troubleshooting:shutdown_script [ODROID Wiki]

It disables each device one by one on shutdown, and it does a normal proper shutdown without the noise of HDD destruction.

The SMART “Head Retract Cycle Count” attribute does not increase anymore on shutdown now.

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