Alcance
The set of Small Computer System Interface (SCSI) standards consists of this document and the SCSIimplementation standards described in 4.2. This document defines a reference model that specifies commonbehaviors for SCSI devices, and an abstract structure that is generic to all SCSI I/O system implementations.The set of SCSI standards specifies the interfaces, functions, and operations necessary to ensureinteroperability between conforming SCSI implementations. This document is a functional description.Conforming implementations employ any design technique that does not violate interoperability.The following concepts from previous versions of the SAM standard are made obsolete by this version:a) support for the SPI-5 SCSI transport protocol;b) Contingent Allegiance;c) the TARGET RESET task management function;d) basic task management model;e) untagged tasks; andf) linked command function