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Alan Turing
n00b
Joined: 10 Sep 2003
Posts: 53
Location: Freiburg, Baden (Germany)
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 Posted: Sat Nov 12, 2011 11:37 pm Post subject: SATA Link Power Management |
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powertop (tool that helps you find what software is using the most power) has the following suggestion:
| Quote: | Enable SATA ALPM link power management via:
echo min_power > /sys/class/scsi_host/host0/link_power_management_policy |
If I do so my home server consumes around 0.5W less power. For me this is really a big deal, since my home server consumes only around 15W in idle.
Now I want to enable SATA Link Power Management by default.
- I could type the command echo min_power > /sys/class/scsi_host/host0/link_power_management_policy after each boot.
Obviously not a convenient way. 
- Put a script executing this command to /etc/local.d/.
Is this a good choice?
E.g., if you want that your hard drive goes to standby after 15(?) minutes, you don't put a script to /etc/local.d/, the "gentoo way" is to put the line sata_all_args="-S 120" to /etc/conf.d/hdparm and add /etc/init.d/hdparm to the default runlevel.
Is there already some init script that I should use to enable this SATA Link Power Management? |
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gorkypl
Guru
Joined: 04 Oct 2010
Posts: 444
Location: Kraków, PL
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| Posted: Mon Nov 14, 2011 12:59 am Post subject: Re: SATA Link Power Management |
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| Alan Turing wrote: |
[*] Put a script executing this command to /etc/local.d/.
Is this a good choice? |
Yes, the best one.
Just read /etc/local.d/README before (you have to end file with .start and so on). |
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Kernel & Hardware
