CSC 110 - Computer Memory Memory Memory is measured in terms of bytes. However, please realize that different components in the computer system may have some memory of there own. Video cards and disk controllers are examples of such components.
Hard disks come in all different logical sizes.
IDE has and is still very popular in the PC market. The is a cheap low end solution for disk drive interfaces. SCSI is a high end solution for disk interfacing. It is faster and more fault tolerant. This format has traditionally been found in high end workstations and file servers.