Disable "Hard Disk Turn Off" to Speed Up Windows XP
Today's modern hard drives access information on disks fast by spinning the
disk at an amazing 7,200 rpm (revolutions per minute). By default, Windows xp is
configured to spin down the hard drive after a short period of inactivity.
Unfortunately, the person who designed this feature must have nodded off
during physics class.
Because of modern low-friction bearings and lubricants, once you get the
disk spinning up to speed, it takes very little energy to keep it spinning.
In physics that principle is called "Conservation of Angular Momentum".
However, after you turn the disk off and let it spin down, it requires
quite a bit of energy to rapidly bring it back up to 7,200 rpm. Imagine
a scenario where disk turn off is set to a bit shorter time than what
you take for break several times each day.
If, after you let the disk spin down, you decide to use an application on
that computer, you'll need to wait for the disk to come up to speed again.
Turning off the hard disk not only wastes power (except perhaps if you leave
the system on overnight), but it also gives you a performance hit.
Fortunately it's very easy to disable hard disk turn off. Select Start |
Settings | Control Panel | Power Options. In the Power Options Properties
dialog box that appears, on the Power Schemes tab, in the "Power Schemes"
drop-down list, select the proper scheme. Then in the settings for that
scheme, in the "Turn off hard disks:" drop-down list select "Never". Then
click on the [Apply] and [OK] buttons.
Conserve energy, improve Windows XP performance, and make your physics
professor proud by disabling Hard Disk Turn Off.