09-16-2004, 02:30 AM

Originally Posted by WilliamC

You don't need to change any laws of physics to achieve that goal all you need is a simple thing called optimization. These drives are designed to consume as much power as a 5400rpm. Apple themselves achieved this with the 5400rpm they have some adaptive power implementations that result in about as much of a power consumption as their 4200 rpm. Research it.

You are confusing two issues. Power management is independent of what kind of drive you have. With everything else being equal, 7200RPM drive will consume more power than 5400RPM drive. PERIOD.

09-16-2004, 05:47 PM

Agreed MoltenLava. Think about it, WilliamC. A 7600RPM drive spins more than a 4200RPM drive. PERIOD. So the 7600RPM drive needs more power (just under 2x the amount of power the 4200RPM drive needs) because it spins faster (just under 2x faster than the 4200RPM drive).

Think about it, it makes sense.

09-17-2004, 12:11 AM

7200rpm and batt. life if you look at these test then you see what has been said before. if i use a 7200rpm my batt life won't be shortened by 5,10,15 or more minutes. is it different on the mac, i doubt it. But i am no mac expert.

Obviously, Hitachi succeeded in getting the energy use of the Travelstar 7K60, which turns at a speed of 7200 rpm, lower than the typical demand of a fast and economical 5200-rpm drive like the Momentus from Seagate. For one, the Travelstar 7K60 has a femtoslider. The femtoslider is not only considerably smaller, it is also significantly lighter than a "normal" picoslider. However, less volume means that less power is needed to move the slider back and forth across the disks. This, in turn, results in lower energy use by the hard drive. For another thing, Hitachi uses a very effective, adaptive power-saving mechanism - the A.B.L.E. (=adaptive battery life extender).

Belive what you want, but facts are facts.