In detailing the various standards, transfers
modes and feature sets associated with the SCSI interface, I have introduced several
important concepts that define the attributes of various types of SCSI buses. New
technologies are often introduced specifically to change these traits, to improve the
interface. It's important to understand how the various aspects of SCSI combine to create
different specific SCSI varieties.
In this section I describe the most important characteristics of the SCSI interface.
This includes a discussion of the three most important defining characteristics of any
SCSI bus: signaling, bus speed and bus width. I then discuss several important SCSI bus
features, many of which have been introduced to improve performance or reliability on the
newest, highest-performance SCSI implementations. This includes a discussion of bus
integrity protection, and advanced features such as command queuing and reordering, domain
validation, quick arbitration and selection, and packetization.
Next: Single-Ended (SE) and Differential (High Voltage Differential, HVD) Signaling
