scope:

This standard defines the command set extensions to facilitate operation of SCSI media changer devices. The clauses of this standard, implemented in conjunction with the requirements of the SCSI Architecture Model - 4 standard and SPC-4, fully specifiy the standard command set for SCSI media changer devices.

The objectives of the SCSI-3 Media Changer Commands - 3 standard are:

a) to permit an application client to communicate with a logical unit that declares itself to be a media changer device in the PERIPHERAL DEVICE TYPE field of the INQUIRY command response data; and

b) to define commands and parameter data to manage the operation of SCSI media changer devices.

This standard makes obsolete the following commands and concepts from previous standards:

a) the READ ELEMENT STATUS ATTACHED command;

b) the MOVE MEDIUM ATTACHED command; and

c) the attached media changer model.

The set of SCSI standards specifies the interfaces, functions, and operations necessary to ensure interoperability between conforming SCSI implementations. This standard is a functional description.

Conforming implementations may employ any design technique that does not violate interoperability.

Figure 1 is intended to show the general structure of SCSI standards. Figure 1 is not intended to imply a relationship such as a hierarchy, protocol stack, or system architecture.