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SCSI Trade Association White Paper
by: Harry Mason, Director, Industry Marketing, LSI Corp.,
       With Contributions by Jay Neer, Advanced Technical Marketing Manager, Industry Standards, Molex

Serial Attached SCSI (SAS) burst upon the storage scene in 2004 as a serial replacement for the once ubiquitous parallel SCSI interconnect. While much attention is often given to the capabilities of the protocol and to the silicon and software required to implement these systems, it is often the physical interconnections that influence the adoption of I/O in a variety of market segments. Parallel SCSI, for example, supported everything necessary for clustered server deployments; however, the large unwieldy nature of the parallel cables and the restricted cabling distances greatly limited SCSI's applicability in these markets.

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Serial Attached SCSI

Serial Attached SCSI

The industry is gearing up for Serial Attached SCSI (SAS), a new, faster version of SCSI designed to meet the demands of enterprise IT for the coming decade. The SAS interface supports both SAS disk drives for mission critical applications and Serial ATA (SATA) drives for low-cost bulk storage of reference data, giving IT managers greater price and performance flexibility in their storage strategies. As a result, managers can now make storage decisions that better align with business requirements, balancing their storage investment between compatible technologies and assigning storage devices to data based on the information's business value, providing a more cost-effective solution. (By Enterprise Management Associates, November 2004)

SAS Raid-On-A-Motherboard: Affordable, high performance RAID

Full-featured RAID data protection is becoming a standard feature in businesses of almost any size, thanks to the increasing affordability of implementing RAID technology. Cost-effective RAID-on-motherboard (ROMB) solutions, using integrated RAID-on-Chip (RoC) devices, enable system integrators to implement robust hardware RAID solutions while optimizing their server motherboard investments. With the union of high-security, cost-effective ROMB and the built-in reliability and availability features included with SAS, system IT managers can now meet the data security requirements of tomorrow on the restrictive budgets of today. (April 2005)

SOptimizing Storage with SAS: Seize the 15K Advantage

Enterprise storage is entering a new era of cost-effectiveness and efficiency, driven by the growing movement towards specialized storage solutions. The value proposition of this application-focused storage is straightforward: Optimize price/performance by matching the storage device to the specific characteristics (quantity, needed availability, etc.) of the data. Naturally, such an approach requires multiple device types, each cost-effectively performing its respective storage duties. (April 2006)

SAS Steps In

SAS Steps In

Over the past several years, companies have enjoyed a wide selection of technologies within the enterprise disk array market. Serial ATA (SATA), Fibre Channel (FC), and even parallel SCSI are viable options. More recently, Serial Attached SCSI (SAS) has entered the mainstream enterprise-class storage market, and its share is growing rapidly. Gartner Dataquest expects SAS to grow from its current 8 percent market share in multi-user drive shipments to 16 percent in 2007. By 2009, analysts expect SAS to make up 45 percent of that market. (March 2007)

SAS Starter Kit: Mixing SAS and SATA Drives in a Single Enclosure

Serial Attached SCSI (SAS) has begun to play a key role as the enterprise continues to move towards more optimized, cost-effective storage platforms. Overcoming many of the limitations of traditional parallel SCSI implementations, SAS solutions that offer connectivity choices and support both SAS and Serial ATA (SATA) drive technology enable enterprises to easily create tiered storage environments. However, concerns about performance expectations and Rotational Vibration Interference (RVI) in mixed SAS/SATA environments are preventing many organizations from adopting SAS technology. (March 2007)

Optimizie Your Investment with Serial Attached SCSI (SAS)

Since the emergence of Serial Attached SCSI two years ago, many high-end storage solution providers and OEMs have recognized the advantages of SAS over its parallel predecessor. Vertical markets that have since adopted SAS technology are the entertainment industry, medical imaging, financial institutions and research and government institutions, which typically need performance and/or capacity. SAS can offer good value, performance, and scalability. (October 2007)

6Gb/s SAS: An Evolutionary Step for SAS Technology (PDF)

Storage demands have continued to escalate and now require more and more complex capabilities. Thus, making it necessary for the storage industry to look beyond 3Gb/s SAS and determine what steps need to be taken to incorporate additional improvements into the SAS protocol.This paper takes a look at the evolution of the SAS protocol and examines the new capabilities that will be provided with the next step along the evolutionary process for the SAS protocol -- 6Gb/s SAS. (September 2008)

Serial Attached SCSI Establishes Its Position In The Enterprise (PDF)

With the advent of 6Gb/s SAS, the Serial Attached SCSI (SAS) architecture and technology is growing its presence within traditional and non-traditional enterprise environments. This white paper will explore the roots of SAS technology, why the SAS architecture is well suited to enterprise markets and how the evolution of SAS technology expands its role in data centers. After addressing the increasing capabilities of SAS and how enterprise environments are deploying SAS, new growth opportunities will be discussed based on how the SAS architecture is adapting to the growing needs of the enterprise. (September 2008)