T10 Working Drafts

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This page is organized as follows:

Small Computer System Interface (SCSI-3)
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Withdrawn Standards and Technical Reports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{Date: 1995/11/27, Rev: 18, Status: Withdrawn, Project: 0994-M}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 is to a final T10 committee working draft. Only T10 members are permitted to access this document. Other people must purchase the ANSI standard, ANSI INCITS 270-1996 [R2001], either through the INCITS Standards Store or by calling ANSI (+1-212-642-4900).

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 is to a final T10 committee working draft. Only T10 members are permitted to access this document. Other people must purchase the ANSI standard, ANSI INCITS 366-2003, either through the INCITS Standards Store or by calling ANSI (+1-212-642-4900).

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 is to a final T10 committee working draft. Only T10 members are permitted to access this document. Other people must purchase the ANSI standard, ANSI INCITS 402-2005, either through the INCITS Standards Store or by calling ANSI (+1-212-642-4900).

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

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

The above link is to a final T10 committee working draft. Only T10 members are permitted to access this document. Other people must purchase the ANSI standard, INCITS 447-2008, either through the INCITS Standards Store or by calling ANSI (+1-212-642-4900).

SCSI Architecture Model - 5 (SAM-5)
{Date: 2009/01/27, Rev: 01, Status: Development, Project: 2104-D}
PDF File: sam5r01.pdf (1120727 bytes)

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

Command Standards

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 is to a final T10 committee working draft. Only T10 members are permitted to access this document. Other people must purchase the ANSI standard, ANSI INCITS 351-2001, either through the INCITS Standards Store or by calling ANSI (+1-212-642-4900).

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 is to a final T10 committee working draft. Only T10 members are permitted to access this document. Other people must purchase the ANSI standard, ANSI INCITS 408-2005, either through the INCITS Standards Store or by calling ANSI (+1-212-642-4900).

SCSI Primary Commands - 4 (SPC-4)
{Date: 2009/05/25, Rev: 20a, Status: Development, Project: 1731-D}
PDF File: spc4r20a.pdf (4771664 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 is to a final T10 committee working draft. Only T10 members are permitted to access this document. Other people must purchase the ANSI standard, ANSI INCITS 306-1998 [R2003], either through the INCITS Standards Store or by calling ANSI (+1-212-642-4900).

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 is to a final T10 committee working draft. Only T10 members are permitted to access this document. Other people must purchase the ANSI standard, ANSI INCITS 405-2005, either through the INCITS Standards Store or by calling ANSI (+1-212-642-4900).

SCSI Block Commands - 3 (SBC-3)
{Date: 2009/05/29, Rev: 19, Status: Development, Project: 1799-D}
PDF File: sbc3r19.pdf (1200967 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 is to a final T10 committee working draft. Only T10 members are permitted to access this document. Other people must purchase the ANSI standard, ANSI INCITS 330-2000 [R2006], either through the INCITS Standards Store or by calling ANSI (+1-212-642-4900).

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 is to a final T10 committee working draft. Only T10 members are permitted to access this document. Other people must purchase the ANSI standard, ANSI INCITS 330-2000/AM1-2003, either through the INCITS Standards Store or by calling ANSI (+1-212-642-4900).

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 is to a final T10 committee working draft. Only T10 members are permitted to access this document. Other people must purchase the ANSI standard, ANSI INCITS 335-2000 [R2006], either through the INCITS Standards Store or by calling ANSI (+1-212-642-4900).

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 is to a final T10 committee working draft. Only T10 members are permitted to access this document. Other people must purchase the ANSI standard, ANSI INCITS 380-2003, either through the INCITS Standards Store or by calling ANSI (+1-212-642-4900).

SCSI Stream Commands - 3 (SSC-3)
{Date: 2009/06/25, Rev: 04c, Status: T10 Approval, Project: 1611-D}
PDF File: ssc3r04c.pdf (3136101 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 is to a final T10 committee working draft. Only T10 members are permitted to access this document. Other people must purchase the ANSI standard, ANSI INCITS 314-1998 [R2003], either through the INCITS Standards Store or by calling ANSI (+1-212-642-4900).

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 is to a final T10 committee working draft. Only T10 members are permitted to access this document. Other people must purchase the ANSI standard, ANSI INCITS 382-2004, either through the INCITS Standards Store or by calling ANSI (+1-212-642-4900).

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 is to a final T10 committee working draft. Only T10 members are permitted to access this document. Other people must purchase the ANSI standard, ANSI INCITS 304-1997 [R2002], either through the INCITS Standards Store or by calling ANSI (+1-212-642-4900).

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 is to a final T10 committee working draft. Only T10 members are permitted to access this document. Other people must purchase the ANSI standard, ANSI INCITS 333-2000, either through the INCITS Standards Store or by calling ANSI (+1-212-642-4900).

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 is to a final T10 committee working draft. Only T10 members are permitted to access this document. Other people must purchase the ANSI standard, ANSI INCITS 360-2002, either through the INCITS Standards Store or by calling ANSI (+1-212-642-4900).

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 is to a final T10 committee working draft. Only T10 members are permitted to access this document. Other people must purchase the ANSI standard, ANSI INCITS 401-2005, either through the INCITS Standards Store or by calling ANSI (+1-212-642-4900).

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 is to a final T10 committee working draft. Only T10 members are permitted to access this document. Other people must purchase the ANSI standard, INCITS 430-2007, either through the INCITS Standards Store or by calling ANSI (+1-212-642-4900).

MultiMedia Command Set - 6 (MMC-6)
{Date: 2009/04/15, Rev: 02c, Status: T10 Approval, Project: 1836-D}
PDF File: mmc6r02c.pdf (4189445 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 is to a final T10 committee working draft. Only T10 members are permitted to access this document. Other people must purchase the ANSI standard, ANSI INCITS 318-1998 [R2003], either through the INCITS Standards Store or by calling ANSI (+1-212-642-4900).

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 is to a final T10 committee working draft. Only T10 members are permitted to access this document. Other people must purchase the ANSI standard, ANSI INCITS 305-1998 [R2003], either through the INCITS Standards Store or by calling ANSI (+1-212-642-4900).

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 is to a final T10 committee working draft. Only T10 members are permitted to access this document. Other people must purchase the ANSI standard, ANSI INCITS 305-1998/AM1-2000 [R2003], either through the INCITS Standards Store or by calling ANSI (+1-212-642-4900).

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

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

The above link is to a final T10 committee working draft. Only T10 members are permitted to access this document. Other people must purchase the ANSI standard, INCITS 448-2008, either through the INCITS Standards Store or by calling ANSI (+1-212-642-4900).

SCSI Enclosure Services - 3 (SES-3)
{Date: not available yet, Status: Development, Project: 2149-D}

SES-3 describes the third-generation command set for SCSI 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 is to a final T10 committee working draft. Only T10 members are permitted to access this document. Other people must purchase the ANSI standard, ANSI INCITS 400-2004, either through the INCITS Standards Store or by calling ANSI (+1-212-642-4900).

Object-Based Storage Devices - 2 (OSD-2)
{Date: 2009/01/16, Rev: 05a, Status: INCITS Approval, Project: 1729-D}
PDF File: osd2r05a.pdf (2455111 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: 2009/03/24, Rev: 00, Status: Development, Project: 2128-D}
PDF File: osd3r00.pdf (2460878 bytes)

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 is to a final T10 committee working draft. Only T10 members are permitted to access this document. Other people must purchase the ANSI standard, ANSI INCITS 403-2005, either through the INCITS Standards Store or by calling ANSI (+1-212-642-4900).

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.

The above link is to a final T10 committee working draft. Only T10 members are permitted to access this document. Other people must purchase the ANSI standard, ANSI INCITS 441-2008, either through the INCITS Standards Store or by calling ANSI (+1-212-642-4900).

Automation/Drive Interface Commands - 3 (ADC-3)
{Date: 2009/05/29, Rev: 01a, Status: Development, Project: 1895-D}
PDF File: adc3r01a.pdf (1067808 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 is to a final T10 committee working draft. Only T10 members are permitted to access this document. Other people must purchase the ANSI standard, ANSI INCITS 302-1998 [R2003], either through the INCITS Standards Store or by calling ANSI (+1-212-642-4900).

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 is to a final T10 committee working draft. Only T10 members are permitted to access this document. Other people must purchase the ANSI standard, ANSI INCITS 367-2003, either through the INCITS Standards Store or by calling ANSI (+1-212-642-4900).

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 is to a final T10 committee working draft. Only T10 members are permitted to access this document. Other people must purchase the ANSI standard, ANSI INCITS 368-2003, either through the INCITS Standards Store or by calling ANSI (+1-212-642-4900).

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 is to a final T10 committee working draft. Only T10 members are permitted to access this document. Other people must purchase the ANSI standard, ANSI INCITS 369-2003, either through the INCITS Standards Store or by calling ANSI (+1-212-642-4900).

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 is to a final T10 committee working draft. Only T10 members are permitted to access this document. Other people must purchase the ANSI standard, ANSI INCITS TR-23-1998, either through the INCITS Standards Store or by calling ANSI (+1-212-642-4900).

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 is to a final T10 committee working draft. Only T10 members are permitted to access this document. Other people must purchase the ANSI standard, ANSI INCITS TR-28-2002, either through the INCITS Standards Store or by calling ANSI (+1-212-642-4900).

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 is to a final T10 committee working draft. Only T10 members are permitted to access this document. Other people must purchase the ANSI standard, ANSI INCITS 376-2003, either through the INCITS Standards Store or by calling ANSI (+1-212-642-4900).

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 is to a final T10 committee working draft. Only T10 members are permitted to access this document. Other people must purchase the ANSI standard, ANSI INCITS 417-2006, either through the INCITS Standards Store or by calling ANSI (+1-212-642-4900).

Serial Attached SCSI - 2 (SAS-2)
{Date: 2009/04/18, Rev: 16, Status: INCITS Approval, Project: 1760-D}
PDF File: sas2r16.pdf (7404699 bytes)
Included File: sas2r16.zip (3467363 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: 2009/05/19, Rev: 02, Status: Development, Project: 2124-D}
PDF File: spl-r02.pdf (7810892 bytes)

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: 2009/05/19, Rev: 02, Status: Development, Project: 2125-D}
PDF File: sas21-r02.pdf (4495800 bytes)
Included File: sas21-r02.zip (3269566 bytes)

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 is to a final T10 committee working draft. Only T10 members are permitted to access this document. Other people must purchase the ANSI standard, ANSI INCITS 269-1996 [R2006], either through the INCITS Standards Store or by calling ANSI (+1-212-642-4900).

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 is to a final T10 committee working draft. Only T10 members are permitted to access this document. Other people must purchase the ANSI standard, ANSI INCITS 350-2003, either through the INCITS Standards Store or by calling ANSI (+1-212-642-4900).

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 is to a final T10 committee working draft. Only T10 members are permitted to access this document. Other people must purchase the ANSI standard, ANSI INCITS 416-2006, either through the INCITS Standards Store or by calling ANSI (+1-212-642-4900).

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 is to a final T10 committee working draft. Only T10 members are permitted to access this document. Other people must purchase the ANSI standard, ANSI INCITS 325-1998 [R2003], either through the INCITS Standards Store or by calling ANSI (+1-212-642-4900).

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 is to a final T10 committee working draft. Only T10 members are permitted to access this document. Other people must purchase the ANSI standard, ANSI INCITS 375-2004, either through the INCITS Standards Store or by calling ANSI (+1-212-642-4900).

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 is to a final T10 committee working draft. Only T10 members are permitted to access this document. Other people must purchase the ANSI standard, ANSI INCITS 365-2002, either through the INCITS Standards Store or by calling ANSI (+1-212-642-4900).

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 is to a final T10 committee working draft. Only T10 members are permitted to access this document. Other people must purchase the ANSI standard, ANSI INCITS 309-1997 [R2002], either through the INCITS Standards Store or by calling ANSI (+1-212-642-4900).

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 is to a final T10 committee working draft. Only T10 members are permitted to access this document. Other people must purchase the ANSI standard, ANSI INCITS 308-1997 [R2002], either through the INCITS Standards Store or by calling ANSI (+1-212-642-4900).

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 is to a final T10 committee working draft. Only T10 members are permitted to access this document. Other people must purchase the ANSI standard, ANSI INCITS 307-1997 [R2002], either through the INCITS Standards Store or by calling ANSI (+1-212-642-4900).

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 is to a final T10 committee working draft. Only T10 members are permitted to access this document. Other people must purchase the ANSI standard, ANSI INCITS 406-2005, either through the INCITS Standards Store or by calling ANSI (+1-212-642-4900).

Automation/Drive Interface - Transport Protocol - 2 ADT-2)
{Date: 2009/04/15, Rev: 06, Status: T10 Approval, Project: 1742-D}
PDF File: adt2r06.pdf (1463423 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: 2009/03/21, Rev: 02, Status: T10 Approval, Project: 2095-D}
PDF File: uas-r02.pdf (316828 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.

The above link is to a final T10 committee working draft. Only T10 members are permitted to access this document. Other people must purchase the ANSI standard, ANSI INCITS 431-2007, either through the INCITS Standards Store or by calling ANSI (+1-212-642-4900).

SCSI / ATA Translation - 2 (SAT-2)
{Date: 2009/05/14, Rev: 07b, Status: T10 Approval, Project: 1826-D}
PDF File: sat2r07b.pdf (1251279 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 is to a final T10 committee working draft. Only T10 members are permitted to access this document. Other people must purchase the ANSI standard, ANSI INCITS 131-1994[R2004], either through the INCITS Standards Store or by calling ANSI (+1-212-642-4900).

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 is to a final T10 committee working draft. Only T10 members are permitted to access this document. Other people must purchase the document through Global Engineering Documents (800-854-7179 or +1-303-792-2181). 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 is to a final T10 committee working draft. Only T10 members are permitted to access this document. Other people must purchase the document through Global Engineering Documents (800-854-7179 or +1-303-792-2181). 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 is to a final T10 committee working draft. Only T10 members are permitted to access this document. Other people must purchase the ANSI standard, ANSI INCITS 232-1996 [R2006], either through the INCITS Standards Store or by calling ANSI (+1-212-642-4900).

SSA SCSI-2 Standards

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

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 is to a final T10 committee working draft. Only T10 members are permitted to access this document. Other people must purchase the ANSI standard, ANSI INCITS 294-1996 [R2006], either through the INCITS Standards Store or by calling ANSI (+1-212-642-4900).

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 is to a final T10 committee working draft. Only T10 members are permitted to access this document. Other people must purchase the ANSI standard, ANSI INCITS 295-1996 [R2006], either through the INCITS Standards Store or by calling ANSI (+1-212-642-4900).

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 is to a final T10 committee working draft. Only T10 members are permitted to access this document. Other people must purchase the ANSI standard, ANSI INCITS 293-1996 [R2006], either through the INCITS Standards Store or by calling ANSI (+1-212-642-4900).

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 commands 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 commands 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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