ISO IEC 14776-331-2002 PDF

Full title and description

St ISO IEC 14776-331-2002 — Information technology — Small Computer System Interface (SCSI) — Part 331: Stream Commands (SSC). This part of ISO/IEC 14776 specifies the SCSI command set extensions used to operate SCSI stream devices (sequential-access and printer devices) and, when used together with the applicable SCSI Primary Commands documents, fully describes the standard command set for the SCSI stream device class.

Abstract

This standard (SSC) defines command-set extensions to support streaming devices attached via SCSI. It enables communication with logical units that report themselves as sequential-access or printer devices, defines commands unique to each stream device type, provides commands to manage stream-device operation, and specifies differences between stream-device types. The SSC is intended to be used in conjunction with related SCSI/SPA documents (for example SCSI Primary Commands) to produce a complete device command specification.

General information

• Status: Published (International Standard; confirmed stage for the 2002 edition).
• Publication date: 2002 (edition 1, published September/October 2002).
• Publisher: ISO/IEC (published as an international standard through ISO and IEC channels).
• ICS / categories: 35.200 — Interface and interconnection equipment.
• Edition / version: Edition 1.0 (2002).
• Number of pages: 95 (printed/pdf edition; page counts reported vary slightly by distributor/format).

Scope

ISO/IEC 14776-331:2002 (SSC) specifies the external behavior and command set extensions required to allow application clients to communicate with SCSI stream devices over a SCSI service delivery subsystem. The scope covers sequential-access (e.g., tape) and printer device types, the commands unique to those device classes, management and control commands for stream operation, and the definition of differences between stream-device types. The SSC is intended to conform with the SCSI-3 architectural model and to be used alongside SCSI Primary Commands and related SCSI family standards.

Key topics and requirements

• Definition of SCSI Stream Commands (SSC) — command set extensions for stream devices (sequential-access and printer devices).
• Command descriptors and expected device responses for streaming operations (read/write, positioning, media management, status reporting).
• Management and control commands specific to tape/printer type stream devices (load/unload, spacing/positioning, format and status queries).
• Conformance requirements and interaction with SCSI Primary Commands and the SCSI-3 Architectural Model (references to related SCSI standards and INCITS specifications).
• Behavioral definitions for logical units that declare the sequential-access or printer device type in INQUIRY responses, and error/status handling semantics for stream operations.

Typical use and users

Implementers of SCSI device firmware and hardware (tape drives, streaming devices, printers), operating system and driver developers, system integrators working with SCSI subsystems, and test/laboratory teams validating SCSI stream-device behavior. The document is used to ensure interoperability of stream devices with host SCSI stacks and to define correct command/response handling for sequential-access and printer devices.

Related standards

Part of the ISO/IEC 14776 SCSI family (SCSI-3 and related parts). Key related documents include SCSI Primary Commands (ANSI/INCITS 351-2001 and related SPC/SPC-2 documents), the SCSI Architectural Model (ISO/IEC 14776-411), and other parts of the 14776 series covering parallel interfaces, controller commands, multimedia, and Fibre Channel mappings. Implementers typically consult these documents together when specifying or testing SCSI stream devices.

Keywords

SCSI, SSC, Stream Commands, sequential-access device, printer device, SCSI-3, INQUIRY, command set, device firmware, tape, printer, SCSI Primary Commands.

FAQ

Q: What is this standard?

A: ISO/IEC 14776-331:2002 is the SCSI Stream Commands (SSC) specification that defines command-set extensions and behavior for SCSI stream devices (sequential-access and printer devices).

Q: What does it cover?

A: It covers command definitions, management and operational commands for stream devices, expected device responses and status semantics, and how stream devices identify themselves to SCSI hosts (e.g., via INQUIRY device type). The SSC is intended to be used together with SCSI Primary Commands and the SCSI architectural model to provide a full device command specification.

Q: Who typically uses it?

A: Hardware and firmware engineers for tape and printer SCSI devices, OS and driver developers, integrators and test engineers who need to ensure SCSI stream-device interoperability and correct command handling.

Q: Is it current or superseded?

A: The 2002 edition is the published edition (edition 1, 2002). The standard has been maintained in international catalogues and was confirmed/published as the 2002 edition; stability and review cycles for ISO standards mean users should check national or ISO catalogues for any later amendments or revisions before assuming long-term currency.

Q: Is it part of a series?

A: Yes — it is part of the ISO/IEC 14776 series for SCSI (SCSI-3 family), which includes parts covering architecture, interfaces (SPI), controller commands, multimedia, Fibre Channel protocol mappings, and related topics; SSC is the part specifically for stream-device commands.

Q: What are the key keywords?

A: SCSI, SSC, Stream Commands, sequential-access, printer, command set, SCSI-3, device firmware, INQUIRY.