One of the major components of a computer today is the Hard Disk. Not so long ago, the Hard Disk as we know it today; didn’t even exist. Though we know Hard Disks to be a necessary part of a computer, many of us do not bother to select one even half as carefully as the processor or even the RAM. Not many of us know that the Hard Disk (HDD) is the slowest part of the computer. Choosing the Hard Disk and Disk technology carefully can probably speed up your computer considerably. Capacity isn't the only thing you need to choose about your hard disk.