Linux disable power management for disk spin off

In Fedora at least, but in many linux-es the HDD spins down to save power. I consider this stupid when the laptop is plugged in so I always disable this. Add this in your ~/.bashrc file
sudo /sbin/hdparm -B 255 /dev/sda > /dev/null
This will make it permanent, but you may try it first from the command line.

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