ISO IEC 14776-262-2017 PDF
Name in English:
St ISO IEC 14776-262-2017
Name in Russian:
Ст ISO IEC 14776-262-2017
Original standard ISO IEC 14776-262-2017 in PDF full version. Additional info + preview on request
Full title and description
Information technology — Small Computer System Interface (SCSI) — Part 262: SAS Protocol Layer - 2 (SPL-2). This international standard specifies the SAS protocol layer (SPL-2) used with Serial Attached SCSI (SAS) interconnects and describes protocol elements and extensions required for the SAS-2 generation of the interface.
Abstract
ISO/IEC 14776-262:2017 (SPL-2) defines the protocol layer for the Serial Attached SCSI (SAS) interconnect and the three transport protocols that operate over SAS: Serial SCSI Protocol (SSP), Serial ATA Tunneled Protocol (STP), and Serial Management Protocol (SMP). The document covers packet formats, link and port behavior, primitives and control sequences, and the transport mappings needed to support SCSI and SATA devices over a SAS fabric.
General information
- Status: Published / Active (international standard).
- Publication date: February 2017 (publication recorded by IEC as 8 February 2017; multiple national bodies list February 2017 implementation dates).
- Publisher: ISO and IEC (published through ISO/IEC JTC 1 / SC 25 processes; available from IEC/ISO national bodies).
- ICS / categories: 35.200 (Information technology — interfaces and interconnection equipment).
- Edition / version: Edition 1.0 (ISO/IEC 14776-262:2017).
- Number of pages: Approximately 785 pages (published electronic version page count as listed by the IEC webstore).
Scope
The standard specifies the protocol layer of the Serial Attached SCSI (SAS) interconnect and the transport protocols using that interconnect: SSP (Serial SCSI Protocol) for SCSI command transport, STP (Serial ATA Tunneled Protocol) to carry SATA devices through SAS fabrics, and SMP (Serial Management Protocol) for management and control of SAS expanders and topology. It defines packet structures, link-layer primitives and behaviors, port and connection management, and requirements to enable multi-initiator/multi-target operation over SAS fabric.
Key topics and requirements
- Definitions and architecture of the SAS protocol layer (SPL-2) and its relationship to SCSI transport and management layers.
- Specification of transport mappings: SSP (SCSI over SAS), STP (SATA tunneling), and SMP (fabric/expander management).
- Packet and frame formats, primitives, link initialization, speed negotiation and error handling for SAS-2 generation links.
- Port, wide-port and PHY behaviors including connection management, power and reset sequences.
- Requirements for interoperability with SATA devices via tunneling and for multi-initiator/multi-target topologies using expanders.
Typical use and users
Engineers and architects designing storage controllers, host bus adapters (HBAs), RAID controllers, SAS/SATA backplanes and expanders; firmware and low-level driver developers implementing SSP/STP/SMP support; test laboratories and compliance teams verifying interoperability; standards administrators and technical committees referencing SAS protocol behavior. The standard is used to ensure interoperable implementations across server, storage array and enterprise storage subsystem vendors.
Related standards
ISO/IEC 14776 is a multipart SCSI family; related parts include the base SPL (part 261), SCSI command and architecture parts (for example SBC, SPC), and other transport/command parts such as USB-attached SCSI (part 251) and enclosure/management parts. Implementers typically use SPL-2 together with SCSI Primary Commands (SPC), SCSI Block Commands (SBC) and relevant parts of the 14776 series.
Keywords
SAS, SPL-2, Serial Attached SCSI, SCSI, SSP, STP, SMP, protocol layer, SAS-2, expanders, storage interconnect, host bus adapter, transport mapping.
FAQ
Q: What is this standard?
A: ISO/IEC 14776-262:2017 is the international standard titled "Information technology — Small Computer System Interface (SCSI) — Part 262: SAS Protocol Layer - 2 (SPL-2)". It defines the protocol-layer rules and transport mappings for Serial Attached SCSI (SAS) corresponding to the SAS-2 generation.
Q: What does it cover?
A: It covers the SAS protocol layer details: packet and frame formats, link and port behavior, primitives, connection management, and three transport protocols that run over SAS — SSP (SCSI), STP (SATA tunneling), and SMP (management). These definitions enable multi-initiator/multi-target operation and interoperable SAS/SATA device communication.
Q: Who typically uses it?
A: Chipset, HBA and storage array designers; firmware and driver developers; interoperability test labs; and systems architects who need to implement or validate SAS/SATA transport behavior and ensure multi-vendor compatibility in enterprise storage systems.
Q: Is it current or superseded?
A: The 2017 edition (ISO/IEC 14776-262:2017, edition 1.0) is the published SPL-2 document. Searches of ISO/IEC and major national adoption records identify the 2017 edition as the active SPL-2 publication; implementers should confirm with ISO/IEC or their national standards body for any corrigenda, amendments or later revisions before final compliance work.
Q: Is it part of a series?
A: Yes — it is one part of the multipart ISO/IEC 14776 SCSI family (multiple parts cover protocol layers, command sets, architecture models and device-class commands). SPL-2 (part 262) is the SAS protocol-layer entry for SAS-2; other parts address related transports and SCSI command/architecture standards.
Q: What are the key keywords?
A: SAS, SPL-2, SCSI, SSP, STP, SMP, Serial Attached SCSI, protocol layer, SAS-2, expanders, transport mapping. These reflect the main technical areas of the standard.