Hi, Luis! It's really interesting question... I'm not familiar ..., but I know one (maybe stupid) way to evaluate hdd's power consumption. You may insert amperemeter between hard drive and battery. I think that is quite safety. But I think also that culprit of hdd's power consumption is spindle with constant speed. > Hi Guys, > > I am currently developing a project which tries to minimize the > consumption of battery in laptops avoiding as much as possible the use of > the hard drive. To evaluate if our implementation is doing well, we need > to know how is the consumption of energy in the laptop or even better how > much power consumes the hard drive in a period of time. > > Thanks in advance, > -- Nikolay N. Ivanov -- Kernelnewbies: Help each other learn about the Linux kernel. Archive: http://mail.nl.linux.org/kernelnewbies/ FAQ: http://kernelnewbies.org/faq/