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Rockbox mail archiveSubject: Re: Power optionsRe: Power options
From: Jens Arnold <arnold-j_at_t-online.de>
Date: Sun, 18 Apr 2004 11:15:47 +0200 Hello [IDC]Dragon >> I wonder if there's a way to have the disk spinup at a slower >> rate than usual ? >> I guess that energy consumption is related to the >> acceleration rate during the spinup phase, so spinning up at >> a slower rate might help save a few watts (just a guess, >> don't beat me if that's plain dumb). > Physically speaking, it doesn't matter how fast or slow you > speed up the disk. It takes the same energy. Faster spinup > means higher power for a shorter time. > The energy depends on the disk RPM (this is why 4200 RPM It would be even worse to have a slower spinup. As Jörg explained, the amount of energy needed to accelerate the disk platters itself does not depend on how fast it is done. But in real-world physics there is always friction, and if you would have a slower spinup the disk would spin longer, rising the enrgy loss generated by friction. Just my $0.02 Regards, Jens _______________________________________________ http://cool.haxx.se/mailman/listinfo/rockbox Received on 2004-04-18 Page template was last modified "Tue Sep 7 00:00:02 2021" The Rockbox Crew -- Privacy Policy |