ISO IEC 14776-222-2005 PDF

Full title and description

Information technology — Small Computer System Interface (SCSI) — Part 222: Fibre Channel Protocol for SCSI, Second Version (FCP-2). This International Standard defines the FC-4 mapping layer and the Fibre Channel protocol elements required to carry SCSI commands, data and status between SCSI initiators and targets over Fibre Channel fabrics and arbitrated loops.

Abstract

The standard specifies the Fibre Channel mapping (FC-4) that uses Fibre Channel framing and signaling services to transport standard SCSI command formats, data, parameter strings, and SCSI status/sense information. It defines FCP link services, information unit (IU) formats, FC-4 name server objects, timers and error-recovery procedures, and describes operation across Fibre Channel Classes of Service 1, 2 and 3.

General information

• Status: Published / Valid.
• Publication date: Edition 1 — February 2005 (2005-02).
• Publisher: ISO in cooperation with IEC (ISO/IEC JTC 1/SC 25).
• ICS / categories: 35.200 (Interface and interconnection equipment).
• Edition / version: Edition 1 (first edition, 2005).
• Number of pages: 146 pages.

Key bibliographic facts above are recorded in the ISO bibliographic entry and confirmed by national standards bodies' catalogues.

Scope

This part of ISO/IEC 14776 defines the Fibre Channel protocol mapping for SCSI (FCP-2), enabling the transmission of SCSI commands, data and status across Fibre Channel transports. It covers FC-4 mapping rules, FCP link- and transport-level definitions, IU formats, name-server objects relevant to SCSI over FC, mode parameter usage, timers for operation and recovery, and link error recovery procedures. The standard is intended to operate over Fibre Channel fabrics and arbitrated loops and to work with FC Classes of Service 1, 2 and 3.

Key topics and requirements

• Definition of the FC-4 mapping layer for SCSI (mapping SCSI to Fibre Channel frames and sequences).
• FCP link-service and extended link-service definitions required to carry SCSI operations.
• Information Unit (IU) formats for command, data, status and sense information.
• FC-4 specific name-server objects and registration rules for SCSI devices on FC networks.
• SCSI mode parameters and timers tailored for Fibre Channel transport and recovery.
• Procedures for link error recovery, sequencing and interaction with Fibre Channel classes of service (Class 1, 2, 3).

These requirements establish interoperability rules for SCSI over Fibre Channel implementations.

Typical use and users

Users include SAN designers and architects, storage-array and HBA (host bus adapter) vendors, firmware and OS storage-stack implementers, Fibre Channel switch and director vendors, systems integrators and test labs responsible for validating SCSI-over-FC interoperability. The standard is applied when implementing or verifying FCP-2 behavior in storage networks and devices.

Related standards

Part of the ISO/IEC 14776 SCSI family. Closely related parts and successor topics include ISO/IEC 14776-223 (Fibre Channel Protocol for SCSI, Third Version — FCP-3) and other 14776-series parts that define Serial Bus Protocol, USB-attached SCSI, SAS protocol layers and SCSI command sets. See the 14776 series for block/command and transport-layer companion standards.

Keywords

FCP-2; Fibre Channel; SCSI; FC-4 mapping layer; FCP; information unit (IU); link service; SCSI initiator; SCSI target; SAN; FC Classes of Service; error recovery.

FAQ

Q: What is this standard?

A: ISO/IEC 14776-222:2005 is the International Standard that specifies the Fibre Channel Protocol for SCSI, Second Version (FCP-2), defining how SCSI commands, data and status are mapped onto Fibre Channel transport services.

Q: What does it cover?

A: It covers the FC-4 mapping for SCSI, FCP link and extended link services, IU formats for command/data/status, FC-4 name-server objects, SCSI mode parameters for FC, timers and link error recovery procedures, and operation across Fibre Channel Classes of Service 1–3.

Q: Who typically uses it?

A: SAN architects, storage-array and HBA manufacturers, firmware and operating system storage-stack developers, Fibre Channel switch vendors, and interoperability test labs use this standard when implementing or validating SCSI over Fibre Channel.

Q: Is it current or superseded?

A: The document is the 2005 first edition of ISO/IEC 14776-222 and is recorded as published/valid by ISO and national bodies. Later related work in the 14776 series includes a third-version FCP (Part 223, published subsequently). Users should verify with their national standards body or ISO for any national adoptions, corrigenda or later revisions before implementation.

Q: Is it part of a series?

A: Yes — it is part of the ISO/IEC 14776 family of SCSI standards (multiple parts cover transport mappings, command sets and device-class interfaces). The series includes parts for later FCP versions, SBP-2, UAS, SAS protocol layers and various SCSI command set specifications.

Q: What are the key keywords?

A: FCP-2, Fibre Channel, SCSI, FC-4, information unit (IU), link service, initiator/target, SAN, FC Classes of Service.