Serial Attached SCSI (SAS)

( Duration: 2 Days )

The Serial Attached SCSI (SAS) Training provides a comprehensive understanding of the Serial Attached SCSI interface and explores why industry is defining a new serial point-to-point enterprise device attach interface, leveraging the SCSI protocol set and supporting a wide range of price/performance storage.

By attending Serial Attached SCSI (SAS) workshop, Participants will learn:

  • The basics of the serial interface
  • Basics overview of SCSI, Fibre Channel (FC) and Serial ATA (SATA)
  • Basics of SAS
  • SAS Roadmaps
  • SAS Architectural Layers
  • SAS protocols
  • SAS infrastructure
  • Expander Devices
  • Application Transport, Port, Link, Phy and Physical layer
  • Enclosure Services Management

Design and validation engineers, software engineers, chip-level, system-level or system board-level designers.



Overview of SCSI

  • SCSI future beyond U640
  • Serial ATA new markets
  • Fibre Channel devices
  • SCSI Express
  • Serial Attached SCSI is the logical evolution of SCSI

Serial Attached SCSI

  • Limits of Serial ATA
  • SAS and SATA
  • Why is Serial Attached SCSI?
  • End user benefits of Serial Attached SCSI
  • The Benefits
  • Role of T10 Committee
  • Serial Attached SCSI overview
  • Serial Attached SCSI environment
  • Market Trends
  • Serial Attached SCSI products

SAS Overview

  • Why Serial Attached SCSI?
  • Why is the new standard necessary?
  • Evolution of SAS
  • 3Gb/s SAS: SAS-1 & SAS-1.1
  • 6Gb/s SAS: SAS-2, SAS-2.1 & SPL
  • Protocols Serial Attached SCSI (SAS) interconnect
  • Transport protocols that use the SAS interconnect
  • Serial SCSI Protocol (SSP)
  • Serial ATA Tunneled Protocol (STP)
  • Serial Management Protocol (SMP)
  • Initiators and Targets
  • Expander Device Topologies
  • Links (Physical vs. Logical)
  • Ports (1x and 4x)
  • Physical Layer
  • Link Layer
  • Transport Layer
  • Logical Operation Overview

SAS architecture

  • Architecture
  • Physical links and phys
  • Ports (narrow ports and wide ports)
  • SAS devices
  • Expander devices (edge expander devices and fanout expander devices)
  • Service delivery subsystem
  • Domains
  • Expander device topologies
  • Edge expander device set
  • Maximum expander device set topology
  • Fanout expander device topology
  • Pathways
  • Connections

SAS domains

  • Service delivery subsystem with expander devices
  • SSP initiator port(s)
  • SSP target port (s)
  • STP initiator port(s)
  • STP target port (s)
  • SMP initiator port(s)
  • SMP target port (s)
  • SAS domain bridging to ATA domains

SAS Names and identifiers overview

  • SAS addresses
  • Hashed SAS address
  • Device names
  • Port names
  • Port identifiers
  • Phy identifiers
  • State machines
  • Resets
  • Expander device model

Physical Layer

  • Physical layer overview
  • Physical Layer Functions
  • Passive interconnect
  • Connectors
  • Cables
  • SAS internal cables
  • SAS external cables
  • Backplanes
  • Single and Dual ports
  • 1x and 4x wide
  • Transmitter and receiver electrical characteristics
  • Characteristics at IT, CT, and XT
  • Jitter
  • Receiver jitter tolerance
  • Compliant jitter test pattern (CJTPAT)
  • Impedance
  • Electrical TxRx connections
  • Transmitter characteristics
  • Receiver
  • Spread spectrum clocking
  • Non-tracking clock architecture
  • READY LED signal electrical characteristics

Phy layer

  • Phy layer overview
  • Encoding (8b10b)
  • Character encoding and decoding
  • Bit order
  • Out of band (OOB) signals
  • SP (phy layer) state machine
  • SP_DWS (phy layer dword synchronization) state machine

Link Layer

  • Link Layer functions
  • 8b/10b encoding
  • OOB
  • Primitives
  • Primitives not specific to type of connections
  • Primitives used only inside SSP and SMP connections
  • Primitives used only inside STP connections and on SATA physical links
  • Address frames and usage
  • Link initialization
  • Power management
  • Loopback tests
  • Physical vs. logical links
  • CRC and Scrambling
  • Clock skew management
  • Idle physical links
  • Address frames
  • Identification and hard reset sequence
  • Identification and hard reset sequence overview
  • Power management
  • Closing an SSP connection
  • SSP (link layer for SSP phys) state machines
  • STP Link Layer
  • SMP Link Layer
  • SSP Connections
  • STP Connections
  • Error handling

Port layer

  • Port layer overview
  • PL (port layer) state machines
  • Timers and count
  • Port layer overall control (PL_OC) state machine
  • Port layer phy manager (PL_PM) state machine

Transport Layer

  • Transport Layer Functions
  • SSP transport layer
  • SSP frame format
  • Information units
  • Sequences of SSP frames
  • SSP transport layer handling of link layer errors
  • SSP transport layer error handling
  • STP transport layer
  • SMP transport layer
  • MT (transport layer for SMP ports) state machines

Application layer

  • Application layer overview
  • SCSI application layer
  • Device server error handling
  • SCSI transport protocol event notifications
  • SCSI com 306
  • SCSI mode parameters
  • SCSI log parameters
  • SCSI power conditions
  • SCSI vital product data (VPD)
  • ATA application layer
  • Management application layer

State Machines

  • Descriptions & Operations
  • Transport & Link
  • SMP Transport & Link
  • SAS Link
  • State machines and SAS device, SAS port, and SAS phy objects
  • Messages between state machines
  • Messages between phy layer and other layers
  • Messages between link layer, port layer, and transport layer for SSP
  • Messages between link layer, port layer, and transport layer for SMP
  • Transport layer to application layer for SSP
  • Transport layer to application layer for SMP


  • Overview
  • Expander device model overview
  • Expander ports
  • Expander connection manager (ECM)
  • Expander connection router (ECR)
  • Broadcast primitive processor (BPP)
  • Expander device interfaces
  • Expander device routing
  • Resets
  • Power Management
  • STP Multi-initiator
  • Expander communication
  • Multiple expanders

Testing and verification

  • The design of systems & devices
  • Practical Verification of Embedded Hardware and Software
  • Test and verification of SAS semiconductors, devices
  • Systems design verification systems
  • SAS Analyzers
  • SAS traffic capture, display and analysis
  • Collection of SAS trace data
  • Hardware captures and displays SAS traffic between host and device
  • Capture and decoding of the SAS protocol
  • Sync generation or cable testing
  • Detect errors
  • Real Time Monitor
  • Compatibility Tester
  • Analyze protocol traffic and debug and test devices
  • Test Cases and Scenarios
  • Case Study 1
  • Case Study 2

Standards and Future Trends

  • Current Standards
  • Serial Attached SCSI Working Group
  • Nearline SAS
  • Products
  • Future

Encarta Labs Advantage

  • One Stop Corporate Training Solution Providers for over 3,500 Modules on a variety of subjects
  • All courses are delivered by Industry Veterans
  • Get jumpstarted from newbie to production ready in a matter of few days
  • Trained more than 20,000 corporate candidates across india and abroad
  • All our trainings are conducted in workshop mode with more focus on hands On

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