Mike McCarty wrote: > This is an interesting article. AIUI, it's useless to spin down > the disc anyway. The graph given is an expanded scale. The very best > it shows is 9.6% increase in lifetime. To put it another way, > only 18 minutes. 9.6% sounds like a lot to me given the CPU, backlight, RAM and so on are all sucking down power the same. Certainly in my experience engineers would be highly pleased with a 10% battery life increase without much performance loss. > BTW, what is the answer to the OP's question? Joel's answer sysstat / iostat seems like a good answer to me. iostat is pretty cool I discover. But if the OP wanted to write an app to do it, the stuff in the laptop mode HDD access reporting is worth examining, or perhaps would have been enough for him as it was. Have a nice day ;-) -Andy
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