Thanks for clearing that one up.
You should really refrain from posting if you don't know what you are talking about. Misinformation breeds on itself. I refer you to
http://www.pctechguide.com/04disks.htm.
Here's a quote for ya:
"The performance of a hard disk is very important to the overall speed of the system - a slow hard disk having the potential to hinder a fast processor like no other system component - and the effective speed of a hard disk is determined by a number of factors.
Chief among them is the rotational speed of the platters. Disk RPM is a critical component of hard drive performance because it directly impacts the latency and the disk transfer rate. The faster the disk spins, the more data passes under the magnetic heads that read the data; the slower the RPM, the higher the mechanical latencies.
Hard drives only spin at one constant speed, and for some time most fast EIDE hard disks span at 5,400rpm, while a fast SCSI drive was capable of 7,200rpm. In 1997 Seagate pushed spin speed to a staggering 10,033rpm with the launch of its UltraSCSI Cheetah drive and, in mid 1998, was also the first manufacturer to release an EIDE hard disk with a spin rate of 7,200rpm."