Do More Unified Storage Architecture: The Path to reducing Long-Term Storage Infrastructure Costs

Convergence to an all-SAS, SFF, self-encrypting drive infrastructure is the ideal solution. Seagate’s compatible enterprise drives provide the benefits of converged storage.



For many IT professionals, the term "enterprise storage" immediately brings to mind the never-ending quest for IT efficiency based on the following criteria: performance, reliability, data integrity.

Enterprise IT managers have traditionally met these requirements with a variety of discrete hard drive technologies in 3.5 inch form factors, with 10K or 15K RPM spindle speeds, over Fibre Channel (FC) or parallel SCSI interfaces. Recently, several new technologies and standards in 2.5 inch form factors over Serial Attached SCSI (SAS), with encryption, have been added to the list. As a result, this disparate mix of technologies has led to over-complex and isolated islands in data centres with uncertain upgrade or maintenance roadmaps, often resulting in a complete "rip out and replace" every few years.

Compounding this problem is today’s enterprise landscape, which is being reshaped by market forces and environmental concerns such as shrinking floor space and energy responsibility, all of which demand better storage systems with broader capabilities and greater efficiencies to enable systems that can scale easily and sustain business growth.

Storage Challenges

Arduous economic conditions, a plethora of regulatory requirements and greater emphasis on environmental and energy-related concerns are some of the key issues that create unprecedented challenges for IT professionals. For example:

Data Growth

Enterprise data is growing exponentially. Adding capacity without long-term integration or expandability can lead to costly "rip out and replace" disruptions later.

­ Data Integrity

Enterprises have moved virtually all their operations and assets into the digital realm, which makes ensuring the reliability and integrity of that data more critical than ever. In addition, the ability to respond promptly to commands is needed to prevent any degradation in system performance.

Data Security

Data breaches, regulations with encryption Safe Harbour1provisions and lawsuits from lost data all underscore why companies must safeguard their data

Green IT

Experts predict that enterprise data centres will soon spend as much on energy (power and cooling) as they will spend on hardware infrastructure.

Cost Containment

Today’s difficult economic climate makes reducing costs an urgent priority; virtualisation, storage auto-tiering and cloud infrastructures have raised expectations for in-house IT infrastructures.

These examples clearly illustrate the complicated storage issues that IT professionals wrestle with each day. It is obvious that a simpler and more sustainable approach to storage is needed.

The New Requirement for Enterprise Storage: Convergence

With the introduction of solid state drives in the highest performing storage tier and in combination with traditional enterprise hard drives servicing the tier-1 and tier-2/3 storage requirements, the foundation for enterprise storage will continue to underpin the migration towards more modern, efficient storage solutions.

The same enterprise demands for performance, reliability and data integrity must still be satisfied — more so now than ever.

Convergence towards a simpler, more interdependent infrastructure is vital to addressing the challenges of the new world of enterprise storage. By lowering total cost of ownership (TCO) and helping to improve return on investment (ROI), this convergence can enable enterprises of all sizes to ensure business sustainability and scalability.

Fewer, Better Enterprise Drives

Convergence is facilitated by a simplified, but far more capable, enterprise drive portfolio that combines three best-of-breed technologies: Serial Attached SCSI (SAS), Small Form Factor (SFF) 2.5 inch storage devices and drives with Self-Encrypting Drive (SED) security capabilities.

SAS Delivers Performance and Data Integrity

The field-proven enterprise SAS interface combines lightning-fast high transfer rates, improved scalability, and the next generation of signal and data integrity features. The net result is greater performance and data protection than with parallel SCSI solutions, all at a lower cost and complexity than Fibre Channel.

SAS also supports SATA drives, which still have a place in some high-capacity/cost-efficient enterprise applications. While lacking some advantages of an all-SAS infrastructure, SAS/SATA deployments retain some of the benefits of convergence.

While nascent interface options exist, such as PCI Express, SAS has stood the test of time and has been well vetted throughout the enterprise ecosystem.

SFF Drives Cut Costs and Boost Efficiency

The market’s rapid acceptance of 2.5 inch enterprise drives for servers has made their strengths well known, including a compelling array of benefits when compared to 3.5 inch drives:

  • Lower power consumption (up to 75 per cent) reduces energy costs
  • Efficient design boosts system-level performance (IOPS/U, IOPS/W)
  • Smaller chassis, low heat output enhances system airflow, cooling

The SFF drive, with its industry-standard 15mm z-height, delivers a best-of-breed solution that is ideal for multi-drive servers in the data centre, while reducing costs and design complexity for OEMs and other system builders. And with SFF drives now delivering capacities of 600GB, they will become the accepted standard for DAS, SAN and NAS storage systems as well.

SED Secures Data and Eases Hard Drive Disposal

Self-Encrypting Drive (SED) technology adds data security where it did not exist before: on the hard drives themselves. Now enterprise storage managers can safeguard corporate data quickly and easily where it lives.

Providing US-government-grade, data-at-rest protection throughout a drive’s entire lifecycle, SED technology also enables enterprises to greatly reduce drive retirement expenses — a significant issue because the quantity of data (and number of associated drives reaching the end of their useful life) is rising.

A Better Enterprise Drive Ecosystem

While the benefits of SAS, SFF and SED technology combine to produce a far better drive, the challenges of enterprise storage cannot be met with a drive-by-drive, or even rack-by-rack, approach. After all, one storage array being secure does not secure the data of an entire enterprise, and a lone storage rack that cuts power use does not effectively reduce the overall energy needs of a data centre.

Standardised storage devices form the foundation for best-of-breed, multi-drive servers and storage solutions that are simpler and less expensive to deploy and manage over time:

  • A comprehensive family of SAS/SFF/SED drives satisfies all enterprise storage challenges with a single, converged set of devices, reducing spare parts and IT personnel training costs.
  • The ability to mix and match drives to cater for the changing needs of the enterprise ensures greater growth capability and reduces costly disruptions and unplanned obsolescence.
  • Standardising on a converged SAS/SFF/SED platform ensures that every storage environment in an enterprise maintains a consistent level of data integrity (via SAS) and data security (via SED), which is a simple, prudent way to protect all the data, all the time.

Solution: Seagate® Unified Storage Architecture

Seagate is meeting the new challenges and requirements of today’s enterprise with a complete, integrated portfolio of true enterprise storage devices: Unified Storage architecture — a convergence to simpler, more reliable and secure storage.

Seagate Unified Storage architecture enables IT customers to:

  • Decrease the number and type of technologies used, simplifying IT support tasks and enabling fewer personnel to support larger storage deployments
  • Optimise data centres by maximising scalability and improving performance
  • Reduce TCO and help improve ROI by lowering power and cooling costs, as well as meet goals for a greener IT environment
  • Incorporate government-grade security on every drive The building blocks of the Seagate Unified Storage architecture strategy are fully compatible 2.5 inch SAS hard drives, each optionally available with SED. These drives are true enterprise-class devices — purpose-built to meet the wide-ranging demands of enterprise storage environments.


By standardising on a uniform and compatible platform throughout these drive families, Seagate enables enterprises to significantly increase their storage efficiency and cost-effectiveness in the data centre:

All SAS Any drive can plug into any SAS backplane or HBA (Host Bus Adapter) anywhere in the storage infrastructure, enabling seamless drive relocation.

All SFF All drives can occupy the same drive slot configurations in servers or external storage enclosures, further boosting deployment freedom and efficiency in less data centre floor space.

All SED When every drive is equipped with available SED2 technology, data can be secured regardless of the type of drive on which it currently resides.

Table: Seagate® Unified Storage Architecture-Enabled Portfolio

Seagate Product Features Benefits
All SFF (2.5 inch)
SAS interface
SED technology available
Enormous energy savings, space efficiency, performance edge over 3.5 inch drives
Lightning-fast throughput, enhanced data integrity and vast scalability
Easy-to-use, cost-effective security for enterprise data at rest
Seagate Savvio® 15K Fastest enterprise drive on the market
Industry-leading 15K RPM enterprise drive with field-proven reliability
Superior performance in transaction-intensive enterprise environments
Rock-solid dependability under the most punishing multi-user loads
Seagate Savvio 10K Lowest-power, high-performance SFF enterprise drive
High capacities
PowerChoice™ on-demand power optimisation
Delivers optimal blend of energy savings and system throughput for mainstream storage
Exceptional capacity, while meeting mainstream performance requirements
Low idling power consumption
Seagate Constellation® Fastest nearline enterprise drive on the market
High-capacity SFF enterprise drive
PowerChoice on-demand power optimisation
System-level (more drives per rack U) performance is more than double that of 3.5 inch drives
Handles growing bulk storage seamlessly
Lowest idling power consumption of any enterprise drive

Converged Storage Solutions on the Rise

The fundamental advantages of the SFF/SAS/SED solutions have not escaped the notice of major enterprise powers such as IBM, HP and Dell.

For example, IBM employs SFF/SAS/SED storage throughout its BladeCenter offerings and SED in its DS5000/8000 storage arrays. Dell has introduced its storage expansion enclosures designed with SFF/SAS drives. Similarly, HP is including SFF/SAS drives in its servers and storage arrays. Today, all these enterprise OEMs are leading with enterprise storage solutions built on the Seagate Unified Storage architecture platform. Currently, over 50 per cent of enterprise drive shipments are SFF/SAS-based solutions.

This widespread industry adoption underscores the compelling benefits of SFF/SAS/SED solutions and offers further evidence that such systems represent the future of enterprise storage.

The industry press has been equally enthusiastic in its predictions of a growing migration to SAS/SFF/SED storage solutions:

“With both internal and external storage systems eventually exploiting SAS architectures, it should lead to better economies of scale and lower costs for SAS storage system components. Given that external storage system OEMs are changing system designs to implement SAS, the time is also right to design for 2.5 inch performance-optimised HDDs.” IDC3

“IDC expects that migration to 2.5 inch HDDs for internal storage will accelerate in the near term and reach nearly 84 per cent of performance-optimised HDD shipments for internal storage by 2010.” IDC4

“...within two to three years, every device that is shipped with a hard drive or solid state disc will offer self-encrypting drives. Chief information security officers, purchasing managers, management software vendors and government agencies should plan for this inevitability.” Jon Oltsik, Senior Analyst at the Enterprise Strategy Group5


In addition to the traditional storage goals of performance, reliability and data integrity, today’s enterprises must address growing demands for greater energy efficiency and data security. Compounding this challenge is the urgent need to significantly reduce the complexity — and the associated costs imposed by that complexity — of their storage infrastructures.

Convergence to an all-SAS, SFF, self-encrypting drive infrastructure is the ideal solution, creating one best-of-breed foundation for powerful, yet simple storage systems. With an unprecedented combination of performance, efficiency and security, such converged systems also reduce deployment, maintenance and upgrade costs. With a simple yet complete portfolio of compatible enterprise drives, Seagate now brings the benefits of converged storage to every IT manager.


1 Allows companies to avoid the obligation of notifying customers of a data breach if they can prove that the data was encrypted

2 Requires TCG-compliant host or controller support

3 Transitioning from 3.5 inch to 2.5 inch Enterprise-Class HDDs: HDD Makers are Making it Happen, March 2010, IDC Doc No. 222289, Volume: 1 Storage Mechanisms: Disc: Insight

4 IDC Worldwide Hard Disk Drive 2010–2014 Forecast: Sowing the Seeds of Change for Enterprise Applications, April 2010, IDC Doc No. 222797

5 Self-encrypting drive standard gains momentum, 4 March 2009, 10:06 AM PST


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