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Making the Move from FC to SAS

If you're a regular reader of STA's Serial Storage Wire, you know that there's a transition taking place in the storage industry from FC-AL to Serial-Attached SCSI (SAS) storage architectures and disk drives... NetApp is well into this technology transition, where SAS-connected disk shelves now account for a majority of storage shipped with new NetApp® systems.

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Contributed article that appeared in January 2007 issue of Storage Solutions Resource Catalog
by: Susan Bobholz, Intel

The first generation of SAS (Serial Attached SCSI) products represents a major leap forward in storage technology. SAS drives have a full-duplex throughput of 3.0 Gb/s and are capable of providing a competitive advantage to enterprises that require fast access to data. While today's servers also have 3.0 Gb/s bandwidth, servers soon will be capable of communicating with storage at 6.0 Gb/s. The availability of 6.0 Gb/s SAS devices is expected to lag behind that of 6.0 Gb/s servers.

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Contributed article that appeared in January 2007 issue of SNS-Europe
by: Sam Barnett, Vitesse

Serial Attached SCSI (SAS) offers a wealth of benefits to the enterprise server and enclosure customer (high reliability and performance, mixed enterprise/desktop drive support, improved economies of scale) and key to scalability and performance is the expander. This article offers a technical exploration of SAS expander technology and its usage in building tiered-storage systems for midrange and enterprise users of tomorrow.

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Solving Command Time-out Issues

Contributed article that appeared in January 2007 issue of Storage Solutions Resource Catalog
by: Mike Micheletti, LeCroy

Serial Attached SCSI (SAS) is a storage interface developed to meet the needs of enterprise-class storage applications. Central to the SAS value proposition is the ability to scale storage systems beyond the limits of today's parallel SCSI, using a switching technology called Expanders. Designed to provide fan-out architecture for SAS, expanders allow SAS initiators to connect up to 16,000 physical devices in a single domain.

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Contributed article that appeared in October 2006 issue of SNS-Europe
by: Paul Vogt, Adaptec

In the past year, Serial Attached SCSI (SAS) has evolved from the conceptual next generation of SCSI to products that offer increased performance and flexibility in the real world. The ubiquitous availability of SAS offers new freedom to use a single storage platform to meets a wide range of performance, capability, capacity, and price requirements.

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Silent Revolution in the Storage Market

Contributed article that appeared in September 2006 issue of SNS-Europe
by: LSI Logic

Flexibility with SAS, SATA and Fibre Channel The storage market is currently undergoing a fundamental change: Two technologies, parallel SCSI and ATA, are being replaced by serial successors. But there's no need to rush; compatibility and market factors will ensure a peaceful coexistence is maintained for a long time yet.

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Contributed article that appeared in December 2002 issue of Computer Technology Review
by: Harry Mason, LSI Logic

The move to serially connected storage devices, primarily disk drives, is irrefutable. While today's installed base is relatively small and consists of a few million Fibre Channel drives, new interfaces that service a greater percentage of the storage market promises to change all of that. The number of serially connected storage devices deployed over the next four years could be well in excess of 100million drives!

VLSI integration and the advances of high-speed serial transceiver technology are rapidly driving the industry toward these versatile connection schemes. The advantages of these serial connections are many: smaller form factors, more flexible and thinner cabling, less weight, more predictable/reliable signaling mechanisms, and topologies that promise to scale with the needs of the end-users.

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Serial Schemes Eyed for Disk Storage

Contributed article written for the October 28, 2002 issue of Electronic Engineering Times
by: Marty Czekalski, Maxtor

The current state of the industry for device-level storage attachment requires system designers to develop multiple solutions for a full range of storage price/performance options. With the advent of Serial Attached SCSI, designers can use a common infrastructure to attach Serial Attached SCSI disks for performance-oriented, enterprise-class applications, or Serial ATA (SATA) disks for cost-optimized applications, or both.

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