DANSK DS/ISO/IEC 14776-333 PDF

This part of ISO/IEC 14776 defines the command set extensions to facilitate operation of the sequential-access device type. This part of ISO/IEC 14776, implemented in conjunction with the requirements of the SCSI Architecture Model - 4 (SAM-4) standard and the applicable clauses of the SCSI Primary Commands - 4 (SPC-4) standard, fully specify the standard command set for the sequential-access device type. This standard provides the following: a) it permits an application client to communicate over a SCSI service delivery subsystem, with a logical unit that declares itself to be a sequential-access device in the PERIPHERAL DEVICE TYPE field of the standard INQUIRY data (see SPC-4); b) it defines commands unique to the sequential-access device type; and c) it defines commands in order to manage the operation of the sequential-access device type. Figure 1 shows the relationship of this standard to the other standards and related projects in the SCSI family standards as of the publication of this standard. Figure 1 - SCSI document relationships The roadmap in figure 1 is intended to show the general applicability of the documents to one another. The figure is not intended to imply a relationship such as a hierarchy, protocol stack, or system architecture. It specifies the applicability of a standard to the implementation of a given SCSI protocol. This standard makes obsolete the following concepts from previous versions of this standard: a) the GAP SIZE field; b) RSMK and setmarks; and c) Attached Media Changer model. The term SCSI is used to refer to the family of standards describes in this clause.