Library » Presentations

  • Welcome Introduction (Harry Mason, LSI & STA)
  • SAS Market Update (Mike Karp, EMA)
  • Delivering on the Promise of SAS (Todd Mottershead, HP)
  • SAS To The Rescue (Arlin Sorenson, Heartland Technology Solutions)
  • SAS: Improving Performance, Lowering Cost (Bob Griswold, Microsoft)
  • SAS Powers Ahead! (Marty Czekalski, Seagate & STA)

SAS_OH_2008_v8 1.pdf

  • Welcome & Introduction to SAS (Marty Czekalski, Maxtor)
  • Impact of SAS on Storage (Phil Brace, LSI Logic)
  • Transitioning the Market to SAS (Bob Moore, HP)
  • Database Server Bricks: Case Study (Rich Johnson, Microsoft)
  • Demo Preview & Questions (Harry Mason, LSI Logic)

SAS_OH_presentation_060509 1.pdf

SAS in the Enterprise Data Center

March 2005 IDF Storage Community Presentation, by Marty Czekalski

  • SAS Products Entering the Market
  • SAS Advantages
  • SAS System Features
  • SAS Protocol is the Key to System Communication
  • Typical SAS High Availability System

Mar05StorageCommunity 1.pdf

SAS 1Q04 Industry Briefing

Steve Denegri, RBC — Predicts

"Serial Attached SCSI (SAS) is poised for adoption as a data transport in addition to its usage as a disk interface. In fact, with direct-attach storage (DAS) remaining a popular choice for incremental disk capacity needs, a tremendous opportunity exists for SAS in connecting these storage resources to servers. Just as SAS will likely displace Parallel SCSI as the interface of choice for enterprise disk drives, a similar upgrade to SAS may also take place at the host-attach level."

Jan04IndustryUpdate 1.pdf

SAS Overview

Overview of SAS architecture and position in the market; by: Marty Czekalski, Technical Marketing Manager, Maxtor — Member of the Board and Vice President of SCSI Trade Association.

  • Serial Attached SCSI is the next evolution of SCSI beyond U320
  • SAS has been designed to be a device and near cabinet interface only, not a network interface
  • Leverages an enhanced Serial ATA PHY while adding support for a second port
  • Serial SCSI utilizes features of Fibre Channel AND compatibility with SATA drives in a point-to-point, switched architecture


What is Serial Technology?

Data travels in time and space between system components--the server and PC, the PC and connected devices, and within the software. Data that is transferred serially moves one bit at a time in linear succession through a fast single path. In contrast, data transferred in parallel mode consists of many data bits moving together simultaneously on a shared pathway.

The primary differentiator between serial and parallel architectures is the clock. In serial technology the clock is embedded in the data. This results in data constantly moving through the system from one point to another using the bandwidth to the fullest extent. A parallel architecture clock moves data at a measured pace, resulting in intermittent periods of inactivity. Data using parallel paths is akin to a vast army marching under the command of one general--it simply can't move as fast. The benefits of serial technology are well understood and are now being used for the most advanced desktop and enterprise applications including USB, 1394, Ethernet and Fibre Channel.

SAS_Brochure2003 1.pdf

Serial Attached SCSI Architecture

  • Key Serial Attached SCSI Features
  • Serial Attached SCSI Topology
  • Multiple Pathways Allow Concurrent Operation
  • Maximum Expander Device Topology
  • Two Edge Expanders
  • Typical Serial Attached SCSI Configuration
  • Out of Band Signaling (OOB)
  • Serial Attached SCSI Expander Operation (with SAS drives)
  • Serial Attached SCSI Expander Operation (with SATA drives)
  • Serial ATA Command Queuing and Serial Attached SCSI
  • Enabling Future Compatibility