How to power-down an USB port?
I have 2 Fit-PC2s, one with Debian 5.0 and the other with Win XP Pro, so the below question applies to either of that OSes.
And the problem is: I bought an external hard disk, Seagate FreeAgent Xtreme 2TB, which heats up during active usage up to 59 Celsius degrees, and maybe even more.
So I just bought "laptop cooler pad" with 3 fans, powered from USB - however it is loud, so I don't want to use it all the time - instead I figured out a simple heat protection scheme:
- enable disk, disable Seagate autosuspend (using sdparm)
- enable cooler pad (the below question is just about it)
- use it
- enable Seagate autosuspend
- wait 15 minutes
- disable cooler pad
I know, how to do it using e.g. custom /etc/init.d script, except I don't know, how to power down USB port to disable the cooler pad.
The important thing is that this cooler pad doesn't register itself as any device - it's just using generic 100mA power from port.
I tried tricks like that:http://www.linuxquestions.org/questions ... me-514863/
But it didn't help.
Maybe someone has some other ideas about powering down USB ports on Fit-PC2?