I see most of the people confused about the RPM of Hard Disk. So what is RPM basically? Its Revolutions per minute. It is a measurement to calculate the rotational speed of the hard disk. It affects the Latency of a hard disk. Latency is the delay for the rotation of the disk to bring the required disk sector under the read-write mechanism. Confused? Lets talk in lame language now. Basically, RPM decides the time that will be taken by the hard disk to access the data. It will affect the data transfer speed of your hard disk as well as the speed of the data to be accessed.
