https://stackoverflow.com/questions/19470314
italiano
english
français
española
中国
日本の
العربية
Deutsch
한국어
Português
RussianChanging the actual RPM is not possible
http://www.pcguide.com/ref/hdd/op/heads/op_Height.htm
In this article it says
"Modern drive heads float over the surface of the disk and do all of their work without ever physically touching the platters they are magnetizing. The amount of space between the heads and the platters is called the floating height or flying height. It is also sometimes called the head gap, and some hard disk manufacturers refer to the heads as riding on an "air bearing". The read/write head assemblies are spring-loaded--using the spring steel of the head arms--which causes the sliders to press against the platters when the disk is stationary. (This is done to ensure that the heads don't drift away from the platters; maintaining an exact floating height is essential for correct operation.) When the disk spins up to operating speed, the high speed causes air to flow under the sliders and lift them off the surface of the disk--the same principle of lift that operates on aircraft wings and enables them to fly."
And then another excerpt from this article
"The distance from the platters to the heads is a specific design parameter that is tightly controlled by the engineers that create the drive. By adjusting the strength of the springs to match the other drive parameters (such as the speed the disks are spinning and the size and shape of the heads) the float height can be precisely maintained."
I think it would be safe to assume that changing the speed of rotation of the platter, would also affect the amount of lift created and would either cause the heads to float to high, to the point where it could not read from the disk, or too low and could cause a head crash
Here's a link to the description of a head crash
