T10 Working Drafts

The T10 working draft documents are available here in Portable Data Format (.PDF) format. You will need an Adobe Acrobat(tm) Reader to view these files:

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This page includes the T10 working draft documents. There are no approved (official) standards here. Once a standard is approved, you should buy it from ANSI (+1-212-642-4900). Your payment insures that you receive the actual standard with all the final changes and it supports the standards process. In most cases, the final T10 committee working draft revision for a project is retained here. The drafts are used by T10 Committee members for reference. In case of any conflict, the published ANSI standard prevails.

Disclaimer: While it is intended that the documents listed here are at the latest committee revision level, there may be some delays in posting drafts here. Also, draft documents are not completed standards. The T10 Technical Committee may modify these documents as a result of its development activities. Any use of information contained in these documents is at your own risk.

This page is organized as follows:

• Small Computer System Interface (SCSI-3)
  • SCSI Architecure
  • Command Sets
  • Protocols and Physical Layers
    • Parallel SCSI
    • Serial Attached SCSI (SAS)
    • Fibre Channel
    • High Performance Serial Bus (IEEE 1394)
    • SCSI RDMA Protocol (SRP)
    • Serial Storage Architecture (SSA)
    • Automation/Drive Interface (ADI)
    • USB Attached SCSI (UAS)
• SCSI / ATA Translation (SAT)
• Small Computer System Interface - 2 (SCSI-2) Family
  • SSA SCSI-2 Standards
• Withdrawn Standards and Technical Reports

Small Computer System Interface

Note that the original third-generation SCSI standards used the name SCSI-3 to distinguish them from SCSI-2. Subsequent SCSI standards have dropped the '-3' from their names because it was cumbersome. So, when the SCSI-3 Architecture Model (SAM) was revised, it became the SCSI Architecture Model - 2 (SAM-2). While the individual components of the SCSI family continue to evolve, there is no SCSI-4 project envisioned.

SCSI Architecture

SCSI-3 Architecture Model (SAM)
{Date: 1995/11/27, Rev: 18, Status: Withdrawn, Project: 0994-M}
PDF File: sam-r18.pdf (417462 bytes)

SAM contains a formal model which describes the requirements to comply with the SCSI architecture.

The above link retrieves the final T10 committee draft. Please contact ANSI (+1-212-642-4900) and ask for ANSI INCITS 270-1996 [R2001] to purchase the official standard or technical report. You can also search for this document on the INCITS Standards Store. All T10 standards are available there for a nominal fee in PDF format.

SCSI Architecture Model - 2 (SAM-2)
{Date: 2002/09/11, Rev: 24, Status: Published, Project: 1157-D}
PDF File: sam2r24.pdf (913781 bytes)

SAM-2 describes the second generation of the SCSI Architecture Model.

The above link retrieves the final T10 committee draft. Please contact ANSI (+1-212-642-4900) and ask for ANSI INCITS 366-2003 to purchase the official standard or technical report. You can also search for this document on the INCITS Standards Store. All T10 standards are available there for a nominal fee in PDF format.

SCSI Architecture Model - 3 (SAM-3)
{Date: 2004/09/21, Rev: 14, Status: Published, Project: 1561-D}
PDF File: sam3r14.pdf (962304 bytes)

SAM-3 describes the third generation of the SCSI Architecture Model.

The above link retrieves the final T10 committee draft. Please contact ANSI (+1-212-642-4900) and ask for ANSI INCITS 402-2005 to purchase the official standard or technical report. You can also search for this document on the INCITS Standards Store. All T10 standards are available there for a nominal fee in PDF format.

SCSI Architecture Model - 4 (SAM-4)
{Date: 2008/05/08, Rev: 14, Status: Publication, Project: 1683-D}
PDF File: sam4r14.pdf (1261479 bytes)

SAM-4 describes the fourth generation of the SCSI Architecture Model.

SCSI Architecture Model - 5 (SAM-5)
{Date: 2008/09/23, Rev: 00, Status: Development, Project: 2104-D}
PDF File: sam5r00.pdf (1226919 bytes)

SAM-5 describes the fifth generation of the SCSI Architecture Model.

Command Sets

SCSI Primary Commands - 2 (SPC-2)
{Date: 2001/07/18, Rev: 20, Status: Published, Project: 1236-D}
PDF File: spc2r20.pdf (5572469 bytes)

SPC-2 contains the second-generation definition of the basic commands for all SCSI devices. SPC-2 is used in conjuction with one of the below standards for the specific device type. In 2006, the ANSI SPC-2 standard was replaced with ISO/IEC 14776-452:2005, which is available through ANSI.

The above link retrieves the final T10 committee draft. Please contact ANSI (+1-212-642-4900) and ask for ANSI INCITS 351-2001 to purchase the official standard or technical report. You can also search for this document on the INCITS Standards Store. All T10 standards are available there for a nominal fee in PDF format.

SCSI Primary Commands - 3 (SPC-3)
{Date: 2005/05/04, Rev: 23, Status: Published, Project: 1416-D}
PDF File: spc3r23.pdf (3044469 bytes)

SPC-3 contains the third-generation definition of the basic commands for all SCSI devices. SPC-3 is used in conjunction with one of the below standards for the specific device type.

The above link retrieves the final T10 committee draft. Please contact ANSI (+1-212-642-4900) and ask for ANSI INCITS 408-2005 to purchase the official standard or technical report. You can also search for this document on the INCITS Standards Store. All T10 standards are available there for a nominal fee in PDF format.

SCSI Primary Commands - 4 (SPC-4)
{Date: 2008/11/13, Rev: 17, Status: Development, Project: 1731-D}
PDF File: spc4r17.pdf (4732333 bytes)

SPC-4 contains the fourth-generation definition of the basic commands for all SCSI devices. SPC-4 is used in conjuction with a standard for the specific device type.

SCSI-3 Block Commands (SBC)
{Date: 1997/11/13, Rev: 08c, Status: Published, Project: 0996-M}
PDF File: sbc-r08c.pdf (796576 bytes)

SBC describes the command sets for block-oriented direct-access devices such as magnetic disk drives.

The above link retrieves the final T10 committee draft. Please contact ANSI (+1-212-642-4900) and ask for ANSI INCITS 306-1998 [R2003] to purchase the official standard or technical report. You can also search for this document on the INCITS Standards Store. All T10 standards are available there for a nominal fee in PDF format.

SCSI Block Commands - 2 (SBC-2)
{Date: 2004/11/13, Rev: 16, Status: Published, Project: 1417-D}
PDF File: sbc2r16.pdf (1170146 bytes)

SBC-2 describes the second-generation command sets for block-oriented direct-access devices such as magnetic disk drives.

The above link retrieves the final T10 committee draft. Please contact ANSI (+1-212-642-4900) and ask for ANSI INCITS 405-2005 to purchase the official standard or technical report. You can also search for this document on the INCITS Standards Store. All T10 standards are available there for a nominal fee in PDF format.

SCSI Block Commands - 3 (SBC-3)
{Date: 2008/11/17, Rev: 17, Status: Development, Project: 1799-D}
PDF File: sbc3r17.pdf (1075494 bytes)

SBC-3 describes the third-generation command sets for block-oriented direct-access devices such as magnetic disk drives.

Reduced Block Command Set (RBC)
{Date: 1999/08/18, Rev: 10a, Status: Published, Project: 1240-M}
PDF File: rbc-r10a.pdf (247065 bytes)

The Reduced Block Commands (RBC) will provided a simplified command set for block devices.

The above link retrieves the final T10 committee draft. Please contact ANSI (+1-212-642-4900) and ask for ANSI INCITS 330-2000 [R2006] to purchase the official standard or technical report. You can also search for this document on the INCITS Standards Store. All T10 standards are available there for a nominal fee in PDF format.

Reduced Block Commands (RBC) Amendment 1
{Date: 2003/05/05, Rev: 01, Status: Published, Project: 1240-M}
PDF File: rbc-a101.pdf (14772 bytes)

RBC Amendment 1 corrects a few defects in the RBC Standard (INCITS.330:2000).

The above link retrieves the final T10 committee draft. Please contact ANSI (+1-212-642-4900) and ask for ANSI INCITS 330-2000/AM1-2003 to purchase the official standard or technical report. You can also search for this document on the INCITS Standards Store. All T10 standards are available there for a nominal fee in PDF format.

SCSI-3 Stream Commands (SSC)
{Date: 2000/01/01, Rev: 22, Status: Published, Project: 0997-M}
PDF File: ssc-r22.pdf (483320 bytes)

SSC describes the command sets for stream-oriented sequential-access devices such as magnetic tape drives.

The above link retrieves the final T10 committee draft. Please contact ANSI (+1-212-642-4900) and ask for ANSI INCITS 335-2000 [R2006] to purchase the official standard or technical report. You can also search for this document on the INCITS Standards Store. All T10 standards are available there for a nominal fee in PDF format.

SCSI Stream Commands - 2 (SSC-2)
{Date: 2003/07/09, Rev: 09, Status: Published, Project: 1434-D}
PDF File: ssc2r09.pdf (787156 bytes)

SSC-2 describes the second-generation command sets for stream-oriented sequential-access devices such as magnetic tape drives.

The above link retrieves the final T10 committee draft. Please contact ANSI (+1-212-642-4900) and ask for ANSI INCITS 380-2003 to purchase the official standard or technical report. You can also search for this document on the INCITS Standards Store. All T10 standards are available there for a nominal fee in PDF format.

SCSI Stream Commands - 3 (SSC-3)
{Date: 2008/01/29, Rev: 04a, Status: T10 Approval, Project: 1611-D}
PDF File: ssc3r04a.pdf (2899939 bytes)

SSC-3 describes the third-generation command sets for stream-oriented sequential-access devices such as magnetic tape drives.

SCSI Stream Commands - 4
{Date: not available yet, Status: Development, Project: 2123-D}

SSC-4 describes the fourth-generation command sets for stream-oriented sequential-access devices such as magnetic tape drives.

SCSI-3 Medium Changer Commands (SMC)
{Date: 1998/03/04, Rev: 10a, Status: Published, Project: 0999-M}
PDF File: smc-r10a.pdf (245827 bytes)

SMC describes the SCSI-3 command set for medium Changers (a.k.a., jukeboxes).

The above link retrieves the final T10 committee draft. Please contact ANSI (+1-212-642-4900) and ask for ANSI INCITS 314-1998 [R2003] to purchase the official standard or technical report. You can also search for this document on the INCITS Standards Store. All T10 standards are available there for a nominal fee in PDF format.

SCSI Media Changer Commands - 2 (SMC-2)
{Date: 2003/11/18, Rev: 07, Status: Published, Project: 1383-D}
PDF File: smc2r07.pdf (281185 bytes)

SMC-2 is the second-generation command set for Media Changers (a.k.a., jukeboxes).

The above link retrieves the final T10 committee draft. Please contact ANSI (+1-212-642-4900) and ask for ANSI INCITS 382-2004 to purchase the official standard or technical report. You can also search for this document on the INCITS Standards Store. All T10 standards are available there for a nominal fee in PDF format.

SCSI Media Changer Command Set - 3 (SMC-3)
{Date: 2008/09/04, Rev: 12, Status: Development, Project: 1730-D}
PDF File: smc3r12.pdf (1647014 bytes)

SMC-3 is the third-generation command set for Media Changers (a.k.a., jukeboxes).

SCSI-3 Multimedia Commands (MMC)
{Date: 1997/05/06, Rev: 10a, Status: Withdrawn, Project: 1048-M}
PDF File: mmc-r10a.pdf (942631 bytes)

MMC describes the command set for multi-media devices such as CD-ROMs based upon (but not necessarily compatible with) SCSI-2. It includes initial support for CD-R and CD-RW writing.

The above link retrieves the final T10 committee draft. Please contact ANSI (+1-212-642-4900) and ask for ANSI INCITS 304-1997 [R2002] to purchase the official standard or technical report. You can also search for this document on the INCITS Standards Store. All T10 standards are available there for a nominal fee in PDF format.

Multi-Media Commands - 2 (MMC-2)
{Date: 1999/08/30, Rev: 11a, Status: Published, Project: 1228-M}
PDF File: mmc2r11a.pdf (1622536 bytes)

MMC-2 describes the second-generation command set for multi-media devices. It includes initial support for DVD...primarily DVD-ROM. It also has updated support for CD-R/-RW. The recording information for DVD is minimal.

The above link retrieves the final T10 committee draft. Please contact ANSI (+1-212-642-4900) and ask for ANSI INCITS 333-2000 to purchase the official standard or technical report. You can also search for this document on the INCITS Standards Store. All T10 standards are available there for a nominal fee in PDF format.

MultiMedia Command Set - 3 (MMC-3)
{Date: 2001/11/09, Rev: 10g, Status: Published, Project: 1363-D}
PDF File: mmc3r10g.pdf (2351214 bytes)

MMC-3 describes the third-generation command set for multi-media devices. It includes more support for DVD. It also includes -RAM, -R, -RW, and +RW and it introduced CD-MRW and DDCD.

The above link retrieves the final T10 committee draft. Please contact ANSI (+1-212-642-4900) and ask for ANSI INCITS 360-2002 to purchase the official standard or technical report. You can also search for this document on the INCITS Standards Store. All T10 standards are available there for a nominal fee in PDF format.

MultiMedia Command Set - 4 (MMC-4)
{Date: 2005/05/04, Rev: 05a, Status: Published, Project: 1545-D}
PDF File: mmc4r05a.pdf (3502318 bytes)

MMC-4 describes the fourth-generation command set for multi-media devices. It has the next major inclusion of support for DVD: +R, +MRW and was rewritten to update the standard according to field behaviour.

The above link retrieves the final T10 committee draft. Please contact ANSI (+1-212-642-4900) and ask for ANSI INCITS 401-2005 to purchase the official standard or technical report. You can also search for this document on the INCITS Standards Store. All T10 standards are available there for a nominal fee in PDF format.

MultiMedia Command Set - 5 (MMC-5)
{Date: 2006/10/24, Rev: 04, Status: Published, Project: 1675-D}
PDF File: mmc5r04.pdf (4262533 bytes)

MMC-5 describes the fifth-generation command set for multi-media devices. It includes the final additions to DVD ...particularly +R double layer. It has initial descriptions and support for all BD media types: ROM, R, and RE.

The above link retrieves the final T10 committee draft. Please contact ANSI (+1-212-642-4900) and ask for INCITS 430-2007 to purchase the official standard or technical report. You can also search for this document on the INCITS Standards Store. All T10 standards are available there for a nominal fee in PDF format.

MultiMedia Command Set - 6 (MMC-6)
{Date: 2008/11/06, Rev: 02a, Status: Development, Project: 1836-D}
PDF File: mmc6r02a.pdf (4590881 bytes)

MMC-6 describes the sixth-generation command set for multi-media devices.

SCSI Controller Commands-2 (SCC-2)
{Date: 1997/09/12, Rev: 04, Status: Published, Project: 1225-M}
PDF File: scc2r04.pdf (936283 bytes)

SCC-2 describes the second generation command set for RAID devices.

The above link retrieves the final T10 committee draft. Please contact ANSI (+1-212-642-4900) and ask for ANSI INCITS 318-1998 [R2003] to purchase the official standard or technical report. You can also search for this document on the INCITS Standards Store. All T10 standards are available there for a nominal fee in PDF format.

SCSI Enclosure Services (SES)
{Date: 1998/01/30, Rev: 08b, Status: Published, Project: 1212-M}
PDF File: ses-r08b.pdf (1081607 bytes)

SES describes the SCSI-3 command set for device enclosures.

The above link retrieves the final T10 committee draft. Please contact ANSI (+1-212-642-4900) and ask for ANSI INCITS 305-1998 [R2003] to purchase the official standard or technical report. You can also search for this document on the INCITS Standards Store. All T10 standards are available there for a nominal fee in PDF format.

SCSI Enclosure Services (SES) - Amendment 1
{Date: 2000/07/12, Rev: 01, Status: Published, Project: 1212-M}
PDF File: ses-a101.pdf (10885 bytes)

SES Amendment 1 corrects a few defects in the SES Standard (NCITS.305:1998).

The above link retrieves the final T10 committee draft. Please contact ANSI (+1-212-642-4900) and ask for ANSI INCITS 305-1998/AM1-2000 [R2003] to purchase the official standard or technical report. You can also search for this document on the INCITS Standards Store. All T10 standards are available there for a nominal fee in PDF format.

SCSI Enclosure Services - 2 (SES-2)
{Date: 2008/05/12, Rev: 20, Status: INCITS Approval, Project: 1559-D}
PDF File: ses2r20.pdf (820008 bytes)

SES-2 describes the second-generation command set for device enclosures.

Object-Based Storage Device Commands (OSD)
{Date: 2004/07/30, Rev: 10, Status: Published, Project: 1355-D}
PDF File: osd-r10.pdf (1296556 bytes)

The Object-Based Storage Device Commands (OSD) defines a command set that stores data objects instead of blocks of data. The purpose of this abstraction is to assign to the storage device more responsibility for managing the location of the data.

The above link retrieves the final T10 committee draft. Please contact ANSI (+1-212-642-4900) and ask for ANSI INCITS 400-2004 to purchase the official standard or technical report. You can also search for this document on the INCITS Standards Store. All T10 standards are available there for a nominal fee in PDF format.

Object-Based Storage Devices - 2 (OSD-2)
{Date: 2008/11/08, Rev: 04c, Status: T10 Approval, Project: 1729-D}
PDF File: osd2r04c.pdf (2481988 bytes)

The Object-Based Storage Device Commands - 2 (OSD-2) defines the second-generation command set for devices that store data as objects instead of blocks of data. The purpose of this abstraction is to assign to the storage device more responsibility for managing the location of the data.

Object-Based Storage Devices - 3 (OSD-3)
{Date: not available yet, Status: Development, Project: 2128-D}

The Object-Based Storage Device Commands - 3 (OSD-3) defines the third-generation command set for devices that store data as objects instead of blocks of data. The purpose of this abstraction is to assign to the storage device more responsibility for managing the location of the data.

Automation/Drive Interface - Commands (ADC)
{Date: 2004/09/14, Rev: 07, Status: Published, Project: 1558-D}
PDF File: adc-r07.pdf (451191 bytes)

Media changer (automation) devices use a private communication link for monitoring and controlling the removable medium devices (drives) installed in them. The proposed Automation/Drive Interface - Commands (ADC) standard specifies commands issued by automation devices to the drives.

The above link retrieves the final T10 committee draft. Please contact ANSI (+1-212-642-4900) and ask for ANSI INCITS 403-2005 to purchase the official standard or technical report. You can also search for this document on the INCITS Standards Store. All T10 standards are available there for a nominal fee in PDF format.

Automation/Drive Interface - Commands - 2 (ADC-2)
{Date: 2007/07/10, Rev: 08, Status: Published, Project: 1741-D}
PDF File: adc2r08.pdf (763443 bytes)

Media changer (automation) devices use a private communication link for monitoring and controlling the removable medium devices (drives) installed in them. The proposed Automation/Drive Interface - Commands - 2 (ADC-2) standard specifies commands issued by automation devices to the drives.

Automation/Drive Interface Commands - 3 (ADC-3)
{Date: 2008/08/27, Rev: 00d, Status: Development, Project: 1895-D}
PDF File: adc3r00d.pdf (1068659 bytes)

Media changer (automation) devices use a private communication link for monitoring and controlling the removable medium devices (drives) installed in them. The proposed Automation/Drive Interface - Commands - 3 (ADC-3) standard specifies commands issued by automation devices to the drives.

Protocols and Physical Layers

Parallel SCSI

SCSI Parallel Interface - 2 (SPI-2)
{Date: 1998/04/13, Rev: 20b, Status: Published, Project: 1142-M}
PDF File: spi2r20b.pdf (3336930 bytes)

(a.k.a., Ultra2 SCSI)
The SPI-2 draft standard is the second generation definition of the SCSI-3 Physical Layer. SPI-2 is a superset of SPI. It contains all pertinent features from SCSI-2, SPI, and Fast-20 plus the new features of Fast-40 and Low Voltage Differential (LVD). The technical content of SIP is also included. Thus SPI-2 is a complete definition of the parallel SCSI physical and protocol layers.

The above link retrieves the final T10 committee draft. Please contact ANSI (+1-212-642-4900) and ask for ANSI INCITS 302-1998 [R2003] to purchase the official standard or technical report. You can also search for this document on the INCITS Standards Store. All T10 standards are available there for a nominal fee in PDF format.

SCSI Parallel Interface - 5 (SPI-5)
{Date: 2003/01/16, Rev: 06, Status: Published, Project: 1525-D}
PDF File: spi5r06.pdf (3997875 bytes)

(a.k.a., Ultra640 SCSI)
The SPI-5 draft standard is the fifth-generation definition of the SCSI-3 Physical Layer.

The above link retrieves the final T10 committee draft. Please contact ANSI (+1-212-642-4900) and ask for ANSI INCITS 367-2003 to purchase the official standard or technical report. You can also search for this document on the INCITS Standards Store. All T10 standards are available there for a nominal fee in PDF format.

SCSI Passive Interconnect Performance (PIP)
{Date: 2002/12/20, Rev: 04, Status: Published, Project: 1439-D}
PDF File: pip-r04.pdf (1013415 bytes)

The SCSI Passive Interconnect Performance Standard (PIP) is a collection of requirements on methodologies to be used to measure the performance of passive SCSI interconnect components such as cable assemblies and backplanes.

The above link retrieves the final T10 committee draft. Please contact ANSI (+1-212-642-4900) and ask for ANSI INCITS 368-2003 to purchase the official standard or technical report. You can also search for this document on the INCITS Standards Store. All T10 standards are available there for a nominal fee in PDF format.

SCSI Signal Modeling - 2 (SSM-2)
{Date: 2003/01/09, Rev: 05a, Status: Published, Project: 1514-D}
PDF File: ssm2r05a.pdf (1222698 bytes)

SSM-2 is a collection of requirements and methodologies to be used to simulate SCSI signals.

The above link retrieves the final T10 committee draft. Please contact ANSI (+1-212-642-4900) and ask for ANSI INCITS 369-2003 to purchase the official standard or technical report. You can also search for this document on the INCITS Standards Store. All T10 standards are available there for a nominal fee in PDF format.

Technical Reports related to the SCSI Parallel Interface:

SCSI Enhanced Parallel Interface (EPI) Technical Report
{Date: 1998/09/16, Rev: 16, Status: Published, Project: 1143-TR}
PDF File: epi-r16.pdf (824556 bytes)

Defines enhancements such as expanders for use with parallel SCSI.

The above link retrieves the final T10 committee draft. Please contact ANSI (+1-212-642-4900) and ask for ANSI INCITS TR-23-1998 to purchase the official standard or technical report. You can also search for this document on the INCITS Standards Store. All T10 standards are available there for a nominal fee in PDF format.

SCSI Domain Validation (SDV)
{Date: 2001/11/06, Rev: 08b, Status: Published, Project: 1378-DT}
PDF File: sdv-r08b.pdf (83161 bytes)

SDV is an NCITS Technical Report describing testing techniques to validate the communication capability of the SCSI physical layer.

The above link retrieves the final T10 committee draft. Please contact ANSI (+1-212-642-4900) and ask for ANSI INCITS TR-28-2002 to purchase the official standard or technical report. You can also search for this document on the INCITS Standards Store. All T10 standards are available there for a nominal fee in PDF format.

Serial Attached SCSI (SAS)

Serial Attached SCSI (SAS)
{Date: 2003/07/08, Rev: 05, Status: Published, Project: 1562-D}
PDF File: sas-r05.pdf (3678446 bytes)

The Serial Attached SCSI (SAS) draft standard contains both a physical Layer that is compatible with Serial ATA and protocols for transporting SCSI commands to SAS devices and for transporting ATA commands to SATA devices.

The above link retrieves the final T10 committee draft. Please contact ANSI (+1-212-642-4900) and ask for ANSI INCITS 376-2003 to purchase the official standard or technical report. You can also search for this document on the INCITS Standards Store. All T10 standards are available there for a nominal fee in PDF format.

Serial Attached SCSI - 1.1 (SAS-1.1)
{Date: 2005/09/21, Rev: 10, Status: Published, Project: 1601-D}
PDF File: sas1r10.pdf (5637775 bytes)

The Serial Attached SCSI - 1.1 (SAS-1.1) draft standard is a follow-on standard to SAS. It is an incremental enhancement to SAS adding features such as transport layer retries and fixes any bugs discovered after SAS is approved. It does not include a higher link rate.

The above link retrieves the final T10 committee draft. Please contact ANSI (+1-212-642-4900) and ask for ANSI INCITS 417-2006 to purchase the official standard or technical report. You can also search for this document on the INCITS Standards Store. All T10 standards are available there for a nominal fee in PDF format.

Serial Attached SCSI - 2 (SAS-2)
{Date: 2008/11/19, Rev: 15, Status: INCITS Approval, Project: 1760-D}
PDF File: sas2r15.pdf (7405574 bytes)
Included File: sas2r15.zip (3268238 bytes)

The Serial Attached SCSI - 2 (SAS-2) draft standard is the second generation of SAS, which adds an option for a 6 Gb/sec link speed. It is based upon SAS-1.1. It continues to document both a physical Layer that is compatible with Serial ATA and protocols for transporting SCSI commands to SAS devices and for transporting ATA commands to SATA devices.

Beginning with SAS-2.1, the protocol layer is separated into its own standard, called SAS Protocol Layer (SPL). It is anticipated that eventually there will be follow-on standards called: SPL-1, SPL-2, etc.

SAS Protocol Layer (SPL)
{Date: not available yet, Status: Development, Project: 2124-D}

The SAS Protocol Layer (SPL) standard documents the SAS protocol layer corresponding to the Serial Attached SCSI - 2.1 (SAS-2.1) and beyond. Prior to this standard, the protocol layer was included with the physical layer. This standard adds enhancements to reduce congestion in the SAS topology and to support interface power management.

Serial Attached SCSI - 2.1 (SAS-2.1)
{Date: not available yet, Status: Development, Project: 2125-D}

The Serial Attached SCSI - 2.1 (SAS-2.1) draft standard defines a number of incremental enhancements to the SAS-2 standard, including active cables, additional connectors, and power management. Beginning with SAS-2.1, the protocol layer is split out into a separate standard, SAS Protocol Layer, (SPL).

Fibre Channel

Fibre Channel Protocol (FCP)
{Date: 1995/12/04, Rev: 12, Status: Published, Project: 0993-M}
PDF File: fcp-r12.pdf (347937 bytes)

FCP defines the protocol to be used to transport SCSI commands over the T11 Fibre Channel interface.

The above link retrieves the final T10 committee draft. Please contact ANSI (+1-212-642-4900) and ask for ANSI INCITS 269-1996 [R2006] to purchase the official standard or technical report. You can also search for this document on the INCITS Standards Store. All T10 standards are available there for a nominal fee in PDF format.

SCSI Fibre Channel Protocol - 2 (FCP-2)
{Date: 2002/10/23, Rev: 08, Status: Published, Project: 1144-D}
PDF File: fcp2r08.pdf (986832 bytes)

FCP-2 defines the second generation Fibre Channel Protocol to be used to transport SCSI commands over the T11 Fibre Channel interface.

The above link retrieves the final T10 committee draft. Please contact ANSI (+1-212-642-4900) and ask for ANSI INCITS 350-2003 to purchase the official standard or technical report. You can also search for this document on the INCITS Standards Store. All T10 standards are available there for a nominal fee in PDF format.

Fibre Channel Protocol - 3 (FCP-3)
{Date: 2005/09/13, Rev: 04, Status: Published, Project: 1560-D}
PDF File: fcp3r04.pdf (954304 bytes)

FCP-3 defines the third generation Fibre Channel Protocol to be used to transport SCSI commands over the T11 Fibre Channel interface.

The above link retrieves the final T10 committee draft. Please contact ANSI (+1-212-642-4900) and ask for ANSI INCITS 416-2006 to purchase the official standard or technical report. You can also search for this document on the INCITS Standards Store. All T10 standards are available there for a nominal fee in PDF format.

Fibre Channel Protocol - 4 (FCP-4)
{Date: 2008/09/11, Rev: 01, Status: T10 Approval, Project: 1828-D}
PDF File: fcp4r01.pdf (1469160 bytes)

FCP-4 defines the fouth generation Fibre Channel Protocol to be used to transport SCSI commands over the T11 Fibre Channel interface.

High Performance Serial Bus (IEEE 1394)

NOTE: Serial Bus Protocol (SBP) has been withdrawn as an ANSI Standard. New designs should consider using SBP-2.

Serial Bus Protocol 2 (SBP-2)
{Date: 1998/05/19, Rev: 04, Status: Published, Project: 1155-M}
PDF File: sbp2r04.pdf (405715 bytes)

SBP-2 defines a protocol to transport generic command sets over the IEEE 1394 interface. This project now includes the information that was in the STS project.

The above link retrieves the final T10 committee draft. Please contact ANSI (+1-212-642-4900) and ask for ANSI INCITS 325-1998 [R2003] to purchase the official standard or technical report. You can also search for this document on the INCITS Standards Store. All T10 standards are available there for a nominal fee in PDF format.

Serial Bus Protocol 3 (SBP-3)
{Date: 2003/09/16, Rev: 05, Status: Published, Project: 1467-D}
PDF File: sbp3r05.pdf (578191 bytes)

SBP-3 defines a protocol to transport generic command sets over the IEEE 1394 interface. This is the third-generation of the Serial Bus protocol.

The above link retrieves the final T10 committee draft. Please contact ANSI (+1-212-642-4900) and ask for ANSI INCITS 375-2004 to purchase the official standard or technical report. You can also search for this document on the INCITS Standards Store. All T10 standards are available there for a nominal fee in PDF format.

SCSI RDMA Protocol (SRP)

NOTE: This project was previously called the SCSI VI Protocol (SVP).

SCSI RDMA Protocol (SRP)
{Date: 2002/07/03, Rev: 16a, Status: Published, Project: 1415-D}
PDF File: srp-r16a.pdf (831986 bytes)

SRP defines a SCSI protocol mapping onto the InfiniBand (tm) Architecture and/or functionally similar cluster protocols.

The above link retrieves the final T10 committee draft. Please contact ANSI (+1-212-642-4900) and ask for ANSI INCITS 365-2002 to purchase the official standard or technical report. You can also search for this document on the INCITS Standards Store. All T10 standards are available there for a nominal fee in PDF format.

SCSI RDMA Protocol - 2 (SRP-2)
{Date: 2003/07/07, Rev: 00a, Status: Project Closed, Project: 1524-D}
PDF File: srp2r00a.pdf (765226 bytes)

The SRP-2 project has been closed due to insufficient interest. The last working draft is available for historical interest. Please see SRP for an approved standard.

Serial Storage Architecture (SSA)

SSA SCSI-3 Protocol (SSA-S3P)
{Date: 1997/04/01, Rev: 05b, Status: Published, Project: 1051-M}
PDF File: s3p-r05b.pdf (359851 bytes)

This protocol is used to transport SCSI-3 commands over SSA.

The above link retrieves the final T10 committee draft. Please contact ANSI (+1-212-642-4900) and ask for ANSI INCITS 309-1997 [R2002] to purchase the official standard or technical report. You can also search for this document on the INCITS Standards Store. All T10 standards are available there for a nominal fee in PDF format.

SSA Transport Layer 2 (SSA-TL2)
{Date: 1997/04/01, Rev: 05b, Status: Published, Project: 1147-M}
PDF File: tl2-r05b.pdf (741925 bytes)

This protocol is for use with SSA-PH1 and SSA-PH2. It replaces SSA-TL1, which only dealt with SSA-PH1.

The above link retrieves the final T10 committee draft. Please contact ANSI (+1-212-642-4900) and ask for ANSI INCITS 308-1997 [R2002] to purchase the official standard or technical report. You can also search for this document on the INCITS Standards Store. All T10 standards are available there for a nominal fee in PDF format.

SSA Physical Layer 2 (SSA-PH2)
{Date: 1997/04/01, Rev: 05b, Status: Published, Project: 1146-M}
PDF File: ph2-r05b.pdf (1333805 bytes)

This draft standard defines the SSA 40 MByte/Sec physical interface.

The above link retrieves the final T10 committee draft. Please contact ANSI (+1-212-642-4900) and ask for ANSI INCITS 307-1997 [R2002] to purchase the official standard or technical report. You can also search for this document on the INCITS Standards Store. All T10 standards are available there for a nominal fee in PDF format.

Automation/Drive Interface (ADI)

Automation/Drive Interface - Transport Layer (ADT)
{Date: 2004/11/18, Rev: 14, Status: Published, Project: 1557-D}
PDF File: adt-r14.pdf (1018702 bytes)

Media changer (automation) devices use a private communication link for monitoring and controlling the removable medium devices (drives) installed in them. The proposed Automation/Drive Interface - Transport Protocol (ADT) standard specifies a protocol for transporting commands, data, and status between automation devices and the drives.

The above link retrieves the final T10 committee draft. Please contact ANSI (+1-212-642-4900) and ask for ANSI INCITS 406-2005 to purchase the official standard or technical report. You can also search for this document on the INCITS Standards Store. All T10 standards are available there for a nominal fee in PDF format.

Automation/Drive Interface - Transport Protocol - 2 ADT-2)
{Date: 2008/09/05, Rev: 05d, Status: Development, Project: 1742-D}
PDF File: adt2r05d.pdf (1090277 bytes)

Media changer (automation) devices use a private communication link for monitoring and controlling the removable medium devices (drives) installed in them. The proposed Automation/Drive Interface - Transport Protocol -2 (ADT-2) standard specifies a protocol for transporting commands, data, and status between automation devices and the drives.

USB Attached SCSI (UAS)

Caution: Revision 00 has not yet been reviewed by the T10 committee.

USB Attached SCSI (UAS)
{Date: 2008/07/14, Rev: 01, Status: Development, Project: 2095-D}
PDF File: uas-r01.pdf (243013 bytes)

The USB Attached SCSI (UAS) draft standard is a USB transport protocol to carry SCSI command sets over USB in a SAM-4 compliant manner, including queuing and autosense. It does not interfere with the USB Mass Storage (MSC) bulk-only transport.

SCSI / ATA Translation (SAT)

SCSI / ATA Translation
{Date: 2006/09/13, Rev: 09, Status: Published, Project: 1711-D}
PDF File: sat-r09.pdf (1721382 bytes)

SCSI / ATA Translation is a software translation layer that maps ATA devices to make them appear to be corresponding SCSI devices.

SCSI / ATA Translation - 2 (SAT-2)
{Date: 2008/08/04, Rev: 06, Status: T10 Approval, Project: 1826-D}
PDF File: sat2r06.pdf (1262583 bytes)

SCSI / ATA Translation - 2 is the second-generation software translation layer that maps ATA devices to make them appear to be corresponding SCSI devices.

SCSI / ATA Translation - 3 (SAT-3)
{Date: not available yet, Status: Development, Project: 2126-D}

SCSI / ATA Translation - 3 is the third-generation software translation layer that maps ATA devices to make them appear to be corresponding SCSI devices.

Small Computer System Interface - 2 (SCSI-2)

SCSI-2 Small Computer System Interface - 2 (SCSI-2)
{Date: 1993/09/07, Rev: 10L, Status: Published, Project: 0375-M}
PDF File: s2-r10l.pdf (6394357 bytes)

SCSI-2 defines the second generation of the Small Computer System Interface.

The above link retrieves the final T10 committee draft. Please contact ANSI (+1-212-642-4900) and ask for ANSI INCITS 131-1994[R2004] to purchase the official standard or technical report. You can also search for this document on the INCITS Standards Store. All T10 standards are available there for a nominal fee in PDF format.

SCSI-2 Technical Information Bulletin #1 (Logging Operations)
{Date: 1995/01/26, Rev: E, Status: Published, Project: 0375-T}
PDF File: s2t1re.pdf (313838 bytes)

SCSI-2 Technical Information Bulletin about Logging Operations.

The above link retrieves the final T10 committee draft. Please contact Global Engineering Documents (800-854-7179 or +1-303-792-2181) and ask for Global SCSI-2 Technical Information Bulletin #1 to purchase the official Technical Information Bulletin.

SCSI-2 Technical Information Bulletin #2 (Partition Management)
{Date: 1995/01/26, Rev: E, Status: Published, Project: 0375-T}
PDF File: s2t2re.pdf (231513 bytes)

SCSI-2 Technical Information Bulletin about Tape Partition Management.

The above link retrieves the final T10 committee draft. Please contact Global Engineering Documents (800-854-7179 or +1-303-792-2181) and ask for Global SCSI-2 Technical Information Bulletin #2 to purchase the official Technical Information Bulletin.

SCSI-2 Common Access Method Transport and SCSI Interface Module (CAM)
{Date: 1995/05/20, Rev: 12b, Status: Published, Project: 0792-M}
PDF File: cam-r12b.pdf (848835 bytes)

Software layering standard for use with SCSI-2.

The above link retrieves the final T10 committee draft. Please contact ANSI (+1-212-642-4900) and ask for ANSI INCITS 232-1996 [R2006] to purchase the official standard or technical report. You can also search for this document on the INCITS Standards Store. All T10 standards are available there for a nominal fee in PDF format.

SSA SCSI-2 Standards

The first generation SSA standards (S2P, TL1, and PH1) were designed to use the SCSI-2 command sets.

SSA SCSI-2 Protocol (SSA-S2P)
{Date: 1996/07/22, Rev: 07b, Status: Published, Project: 1121-M}
PDF File: s2p-r07b.pdf (468478 bytes)

This protocol is used to transport SCSI-2 commands over SSA.

The above link retrieves the final T10 committee draft. Please contact ANSI (+1-212-642-4900) and ask for ANSI INCITS 294-1996 [R2006] to purchase the official standard or technical report. You can also search for this document on the INCITS Standards Store. All T10 standards are available there for a nominal fee in PDF format.

SSA Transport Layer 1 (SSA-TL1)
{Date: 1996/07/22, Rev: 10b, Status: Published, Project: 0989-M}
PDF File: tl1-r10b.pdf (1255593 bytes)

This protocol is for use only with SSA-PH1.

The above link retrieves the final T10 committee draft. Please contact ANSI (+1-212-642-4900) and ask for ANSI INCITS 295-1996 [R2006] to purchase the official standard or technical report. You can also search for this document on the INCITS Standards Store. All T10 standards are available there for a nominal fee in PDF format.

SSA Physical Layer 1 (SSA-PH1)
{Date: 1996/07/22, Rev: 09c, Status: Published, Project: 1145-M}
PDF File: ph1-r09c.pdf (1605673 bytes)

This draft standard defines the SSA 20 MByte/Sec physical interface.

The above link retrieves the final T10 committee draft. Please contact ANSI (+1-212-642-4900) and ask for ANSI INCITS 293-1996 [R2006] to purchase the official standard or technical report. You can also search for this document on the INCITS Standards Store. All T10 standards are available there for a nominal fee in PDF format.

Withdrawn Standards and Technical Reports

T10 is under an obligation to periodically review its standards and technical reports to determine whether on they should be revised, reaffirmed, or withdrawn as ANSI standards or techical reports. Below is a list the T10 standards and technical reports that have been withdrawn.

Please note that these documents are no longer ANSI standards or technical reports. Information about them is being provided for historical interest but these former standards should not be used for new designs. Contact the INCITS Secretariat for availability information.

Interfaces between flexible disk cartridges and their host controllers
{Status: Withdrawn; Project: 0052-M; Designation: ANSI/ISO 9315-1989[1994]}
This ANSI standard was adopted as an International Standard (ANSI/ISO 9315-1989[1994]), which was eventually withdrawn.

Storage Module Interfaces (SMD-E)
{Status: Withdrawn; Project: 0053-M; Designation: ANSI INCITS 91M-1987 [R2002]}
This ANSI standard was originally published in 1987, was reaffirmed until 2002, and was withdrawn in 2007.

Small Computer System Interface (SCSI)
{Status: Superseded, Project: 0375-M; Designation: X3.131-1986}
This was the original SCSI standard (X3.131-1986).

Device Level Interface for Streaming Cartridge and Cassette Tapes Drives
{Status: Withdrawn; Project: 0378-M; Designation: X3.146-1986}
This ANSI standard was originally published in 1986 as X3.146-1986. It was reaffirmed in 1992 and was withdrawn in 1997.

Enhanced Small Device Interface (ESDI)
{Status: Withdrawn; Project: 0587-M; Designation: X3.170-1990[1994]/X3.170a-1991[1994]}
This disk drive interface standard was originally published as X3.170-1990. In 1991, an amendment was approved and the combined documents were identified as X3.170:1990/X3.170a-1991. In 1994, ESDI was reaffirmed as X3.170-1990[1994]/X3.170a-1991[1994]. This standard was withdrawn in April 1999.

SCSI-3 Parallel Interface (SPI)
{Status: Withdrawn; Project: 0855-M; Designation: X3.253-1995}
SPI documented the SCSI-3 physical layer, including cables, connectors, drivers, and receivers. This standard was withdrawn in January 2000 in favor of SPI-2.

SCSI-3 Parallel Interface Amendment (SPI AM1)
{Status: Withdrawn; Project: 0855-A1; Designation: SCSI-3 Parallel Interface Amendment (SPI AM1)}
SPI Amendment 1 fixed several errors and replaced the SCAM Annex. This Amendment was withdrawn along with SPI in January 2000 in favor of SPI-2.

SCSI-3 Interlocked Protocol (SIP)
{Status: Withdrawn; Project: 0856-M; Designation: X3.292-1997}
SIP defined the protocol used to transport SCSI commands over the SCSI-3 Parallel Interface (SPI). This standard was withdrawn in January 2000 in favor of SPI-2.

SCSI-3 Generic Packetized Protocol Technical Report (GPP)
{Status: Withdrawn; Project: 0991-M; Designation: ANSI INCITS TR-16-1997}
GPP defined a protocol for transporting SCSI-3 commands over any packet interface.

Serial Bus Protocol (SBP)
{Status: Withdrawn; Project: 0992-M; Designation: X3.268-1997}
SBP defined a protocol to transport generic command sets over the IEEE 1394 interface. It was almost immediately withdrawn in favor of SBP-2.

SCSI-3 Primary Commands (SPC)
{Status: Withdrawn; Project: 0995-M; Designation: ANSI INCITS 301-1997 [R2002]}
SPC was the first of the SPC-n standards. It documented the the basic commands for all SCSI-3 devices. This standard was withdrawn in 2007 in favor of the later SPC-n standards.

SCSI-3 Fast-20 Parallel Interface (Fast-20)
{Status: Withdrawn; Project: 1071-M; Designation: X3.277-1996}
Fast-20 defined the requirements for Fast-20 data transfers; it was used in conjunction with SPI. This standard was withdrawn in January 2000 in favor of SPI-2.

SCSI Parallel Interface - 3 (SPI-3)
{Status: Withdrawn; Project: 1302-M, Designation: ANSI INCITS 336-2000}
(a.k.a., Ultra3 SCSI)
SPI-3 defined the third generation the SCSI-3 Physical Layer. This standard was withdrawn in January 2006 in favor of SPI-4

SCSI-3 Controller Commands (SCC)
{Status: Withdrawn; Project: 1047-M; Designation: X3.276-1997}
SCC (X3.276-1997) described the first-generation command set for RAID devices. It was withdrawn in favor of SCC-2 in January 2000.

SCSI Parallel Interface - 4 (SPI-4)
{Status: Withdrawn; Project: 1365-M, Designation: ANSI INCITS 362-2002}
(a.k.a., Ultra320 SCSI)
SPI-4 defined the fourth-generation the SCSI-3 Physical Layer. This standard was withdrawn in 2007 in favor of SPI-5.

SCSI Signal Modeling (SSM)
{Status: Withdrawn; Project: 1414-DT, Designation: ANSI INCITS TR-29-2002}
SSM was a Technical Report containing a collection of requirements on methodologies to be used to simulate SCSI signals. This Technical Report was withdrawn in 2007 in favor of SSM-2.

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