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On 7/18/07, Hendrik Boom <hendrik@××××××××××.com> wrote: |
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> On Sun, 03 Jun 2007 12:49:21 -0500, Dan Farrell wrote: |
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> |
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> > it takes just as much power to |
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> > spin up the drive as to keep it spinning for a few extra minutes. |
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> |
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> So ... spin it down after a few more minutes? |
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> |
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> -- hendrik |
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No, only spin it down when the savings from the down cycle outweigh |
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the power cost of spinup+spindown (I don't know whether spindown uses |
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extra power, to "brake" the drive or anything). |
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|
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Say you have a drive that uses 1W/m (huge, but I'm being merciful to |
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my math skills) while in usage, and requires 5W to spinup. If you're |
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going to shut it down for 1m, you're looking at saving 1W and using |
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5, net use of 4, when leaving it spinning would only use 1. However, |
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if it's going to be inactive for 30 min, you're using 5 and saving 30, |
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net savings of 25. |
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|
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-- |
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Ryan W Sims |
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-- |
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gentoo-user@g.o mailing list |
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