Most spinning disk drives (HDDs) have built-in power management features that will automatically spin down after a period of inactivity, but you can also configure this behavior on your Raspberry Pi for more control.

Default behavior: Many drives will automatically enter a low-power state after 10-20 minutes of inactivity, but this varies by manufacturer and model.

Manual control options:

1. Using hdparm (most common approach):

# Check current power state
sudo hdparm -C /dev/sda

# Set spindown time (example: 60 = 5 minutes of inactivity)
sudo hdparm -S 60 /dev/sda

# Make it permanent by adding to /etc/hdparm.conf

Using hd-idle (alternative tool):

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