I have done it myself with my harddisk. I do not own a powerbook, but my harddrive supported that APM (advanced power mode). apparently i've set it to 0 so that my harddrive was more quiet.
on topic; if you set it to maximum value your PB will be faster and more responsive and you battery life will decrease a little bit.
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hint: More INFO is appreciated !
<a href="http://www01.u-page.so-net.ne.jp/gb3/eijim/index-E.html" target="_blank">http://www01.u-page.so-net.ne.jp/gb3/eijim/index-E.html</a>
I have done it myself with my harddisk. I do not own a powerbook, but my harddrive supported that APM (advanced power mode). apparently i've set it to 0 so that my harddrive was more quiet.
on topic; if you set it to maximum value your PB will be faster and more responsive and you battery life will decrease a little bit.
go on and try.