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SCSI Express Defined

Accelerate your enterprise with SCSI Express, the robust and proven SCSI protocol combined with PCIe that creates an industry-standard path to PCIe-based storage. SCSI Express combined with SAS-based solutions provides unprecedented performance and low latency that enterprises demand.. SCSI-based solutions continue to stand the test of time, evolving to meet the needs of the storage and computing world. Advance your storage solutions to the next interconnect with SCSI Express!

  • Brings enterprise-class SCSI storage to low-latency PCIe
  • Enables tiered/caching environments
  • Preserves SCSI management, feature set ,and tools
  • Extends storage investments, leveraged to PCIe
  • Provides co-existence with SAS


SCSI Express DataSheet (pdf).


Video Presentation from SNW-Europe 2013

This video presentation is hosted on Juku Italy, however Czekalski's remarks are in English. November 9, 2013

Czekalski discusses SCSI Express and the roadmap for 12Gb/s product deployments. Link to the presentation.

In this "Ask-the-Expert" short presentation at SNW Europe in Frankfurt, Germany on October 30, 2013, STA President Marty Czekalski gave a high level overview of Express Bay storage options.

Slide titles:

  • Express Bay: PCIe, SAS, SATA, SATAe
  • Express Bay Components
  • Refresher: SAS/SATA Compatibility
  • SFF-8639 Dual-port SAS PCIe x4 Connectors
  • SAS Connector Compatibility
  • Power Limit Control
  • Dual Port With PCIe for Higher Availability
  • Wide Port SAS for Increased Throughput

STA Express Bay Expert Session V2-web.pdf

SCSI Express: PCIe Storage for the Enterprise

In this "Ask-the-Expert" short presentation at SNW Europe in Frankfurt, Germany on October 29, 2013, STA President Marty Czekalski gave a high level overview of PCIe storage and its role in the enterprise.

Slide titles:

  • SCSI Express
  • SCSI Express Components
  • Express Bay
  • SCSI Express Devices
  • SCIS Express Roadmap

STA SCSI Express Expert Session V2-web.pdf

This panel session was chaired by SCSI Trade Association board member, David Allen, Director Storage Business Development. Panelists included:

  • Marty Czekalski, Seagate Technology
    Interface and Emerging Architecture Program Manager
    President, SCSI Trade Association
  • Joe Foster, HP
    Industry Standard Server (ISS) Storage Distinguished Technologist
  • Mike James, SanDisk
    Director Engineering
    Director, SCSI Trade Association
  • Steve Johnson, LSI
    Distinguished Engineer

The panel and accompanying presentation addressed the SCSI Express value proposition:

  • Performance and innovation
    • Increased performance through lower latency for emerging advanced technologies
    • Enables new storage architectures
  • Reliability
    • Proven enterprise SCSI ecosystem
    • Architected for nonstop availability
  • Investment Protection
    • Coexistence with SAS via Express Bay and common command set
    • Leveraging robust middleware ecosystem

Ron Noblett: HP Vice President, Infrastructure & Storage, Industry Standard Servers & Software, Hyperscale
Barry Luck: IBM Director, Next Generation Platforms, Ecosystems

Ron Noblett from HP and Barry Luck from IBM discuss how the industry is working together through the SCSI Trade Association to deliver SCSI Express to meet the business needs for faster access to data in a cloud-enabled world.


SCSI Express_Noblett_Luck.pdf

SCSI Express Overview

Provides an in depth overview of SCSI Express including benefits, use cases and solution implementations using Express Bay. Come learn how the industry standard SCSI Express interface delivers unprecedented performance and low latency to enterprise-class storage by combining the proven SCSI protocol with PCIe.



Press Releases

Milestone signals SCSI Express products are in development and moving forward

SAN FRANCISCO - February 4, 2014 -- In a move that punctuates the importance of technical standards including interoperability, investment protection and improved quality for end users, the SCSI Trade Association (STA) today announced the T10 Technical Committee completed and forwarded the first version of the SCSI Express specifications to the InterNational Committee on Information Technology Standards (INCITS) in November 2013. The SCSI Express specifications include the SCSI over PCI (SOP) and PCI Express (PCIe) Queuing Interface (PQI) technical standards.

12Gb/s SAS products expected in production volumes in 2013 along with advancement of SCSI Express technology

SAN FRANCISCO - February 5, 2013 — The SCSI Trade Association (STA) (, a member-run industry association established to support and promote SCSI technology, today announced its newly elected Board of Directors for 2013. After appointments to the board were made in July 2012 due to job changes and a retirement, the entire board roster was reelected.

Based on proven SCSI protocol, SCSI Express meets lower latency needs of PCIe yet suitable for SSDs and other advanced storage technologies

SAN FRANCISCO - October 9, 2012 — The SCSI Trade Association (STA) today announced the advancement of the SCSI Express initiative, targeted at databases, virtual servers and online transactional applications that require lower latency from critical data storage. Combining the proven SCSI (Small Computer System Interface) storage interface protocol with the PCIe (Peripheral Component Interconnect Express) computer expansion bus standard, SCSI Express provides a foundation for innovation of enterprise data storage and increased performance while extending investments in existing SCSI-based storage technology.

SAN JOSE -- May 9, 2012 -- Today at the STA ( Technology Showcase event co-located with the May T10 Standards meeting, a newly innovated Windows offloaded data transfer (ODX) technology was exhibited by Microsoft, Dell, HP, IBM and NetApp. Windows ODX enables the host system to interact with the storage arrays to perform data movement without consuming computer network bandwidth or host CPU cycles. By putting the storage array in charge of the data transfer, the server is left to perform other tasks. Microsoft and storage array partners have cooperated to develop a new T10 standard that specifies the range of blocks to be moved at the file level. This is a completely new way of doing data block movement within and between storage arrays. This capability is now available in Windows Server 2012 Beta and ODX capable storage arrays.

Decoding for PQI Now Available in PCI Express Protocol Analyzer

STA Technology Showcase, Santa Clara, CA, May 9, 2012 - LeCroy Corporation, the worldwide leader in protocol test solutions, today demonstrated new features added to its PCI Express protocol analyzer line of products that will support testing and debugging of all recently announced PCIe® Solid State Drive (SSD) host interfaces. Previously, LeCroy had been the first to introduce NVM Express decode functionality to all of their Summit protocol analyzer line of products, helping reduce decoding time for complex PCIe host/device transactions. Now LeCroy is broadening its support of SSD host interfaces to include support for SCSI Express's PQI (PCIe architecture Queuing Interface).

Initiative guarantees investment protection and generational accessibility with SAS platforms

San Francisco — April 3, 2012 — The SCSI Trade Association (STA) (, a member-run industry association established to support and promote SCSI technology, today announced that it has accepted SCSI Express as a formal project and has taken ownership of refining, defining and marketing this data storage industry standard initiative.

SCSI Express is an industry initiative designed to adapt storage to Peripheral Component Interconnect Express (PCIe). It utilizes the SCSI over PCIe (SOP) and PCIe architecture queuing interface (PQI) model being defined within the T10 Technical Committee.