USB to Sata Adapter - SSD Power Management

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Happy New Year to Everyone,


Am I right to assume there is no power management at all when using a SSD on a usb to sata adapter in Linux?


I have this crazy plan to salvage a broken laptop and replace the dead motherboard with a sbc and other components to make the laptop useful again and one with better battery life, than 3 hours while building websites it used to give me.


When the usb to sata adapter is plugged in alone, it consumes 50ma more which is ok. Add my 120gb ssd and adds another 150ma which I think is normal for the drive when idle but no sata link power management.


I tried using powertop, --calibrate then --auto-tune and the usb suspend tunables went to "good" status but it made no difference.




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