13.2 SCSI ARCHITECTURE

The Small Computer System Interface, or SCSI (pronounced “scuzzy”), was invented in 1981 by a then-premiere disk drive manufacturer, Shugart Associates, and NCR Corporation, formerly also a strong player in the small computer market. This interface was originally called SASI for Shugart Associates Standard Interface. It was so well designed that it became an ANSI standard in 1986. The ANSI committees called the new interface SCSI, thinking it better to refer to the interface in more general terms.

The original standard SCSI interface (which we now call SCSI-1) defined a set of commands, a transport protocol, and the physical connections required to link an unprecedented number of drives (seven) to a CPU at an unprecedented ...

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