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HGST Research Demonstrates World's Fastest SSD At Flash Memory Summit

Technology Demonstration Highlights New HGST Architecture for Future Non-Volatile Memory Components, Enabling PCIe-attached SSD to Deliver Three Million I/Os per second and 1.5us Access Time

SAN JOSE, Calif., Aug. 4, 2014 /PRNewswire/ -- Flash Memory Summit 2014 (HGST Booth #316) - Enterprise storage leader HGST, a Western Digital company (NASDAQ: WDC), today is previewing a new architecture for solid-state drives (SSDs) that enables applications to provide faster insights to the data-intensive questions of tomorrow. The demonstration shows unprecedented SSD performance levels that are achieved by utilizing a combination of HGST's new, latency-optimized interface protocols with next-generation non-volatile memory components.

HGST (formerly Hitachi GST and now a Western Digital company) provides a wide range of products that includes hard disk drives, enterprise-class solid state drives, and innovative external storage solutions and services that store, preserve and manage the world's most valued data.

The SSD demonstration utilizes a PCIe interface and delivers three million random read IOs per second of 512 bytes each when operating in a queued environment and a random read access latency of 1.5 microseconds (us) in non-queued settings, delivering results that cannot be achieved with existing SSD architectures and NAND Flash memories. This performance is orders of magnitude faster than existing Flash based SSDs, resulting in a new class of block storage devices.

"The PCM SSD demonstration is a great example for how HGST sets the pace of the rapidly evolving storage industry," said Steve Campbell, chief technology officer, HGST. "This technology is the result of several years of research and advanced development aimed at delivering new levels of acceleration for enterprise applications. The combination of HGST's low-latency interface protocol and next-generation non-volatile memories delivers unprecedented performance, and creates exciting opportunities for new software and system architectures that HGST is exploring with our customers and industry partners."

Applications for Future Non-Volatile Memory in SSDs
The memory used in this SSD consists of Phase Change Memory (PCM) components with a capacity of 1Gb. PCM is one of several new classes of high-density, non-volatile memories that exhibit dramatically faster read access times when compared to NAND Flash memory.

In order to fully expose the capabilities of these new memory technologies to the server system and its software applications, HGST has also developed a low-latency interface architecture that is fully optimized for performance and is agnostic to the specific underlying memory technology. HGST used its controller expertise to integrate the 45 nm 1Gb PCM chips to build a prototype full height, full length PCIe Gen 2x4 SSD card.  

To achieve latencies close to 1us, HGST devised, in conjunction with researchers at the University of California, San Diego, a new communication protocol. This new interface protocol was introduced earlier this year at the 2014 Usenix conference on File and Storage Technologies (FAST). 

A New Class of Storage
"Three million IOPs is exceptional, but that is not the most exciting part of the demonstration," said Dr. Zvonimir Bandic, manager of Storage Architecture at HGST Research. "What is really exciting is to be able to deliver latencies close to 1us for small block random reads. This is something that just cannot be done with NAND Flash and current controller and interface technologies." 

The most dramatic advantage these emerging NVMs have over NAND Flash is that their read latency is shorter by more than two orders of magnitude. In order to harness this intrinsic advantage, new controller and interface technologies are needed. Current state-of-the-art NVMe protocol is not a problem in the context of NAND Flash but will be inadequate for these emerging NVM technologies that will introduce a new class of storage into the data center ecosystem.

The HGST PCM SSD will be demonstrated in the HGST booth #316 at the 2014 Flash Memory Summit in the Santa Clara Convention Center, Santa Clara, CA on Wednesday, August 6, 2014 and Thursday, August 7, 2014.

For more information about Research & Development at HGST, please visit the Science of Storage section at

Follow HGST on Facebook, Twitter, LinkedIn, Google+, and #HGSTStorage

About HGST
HGST, a Western Digital company (NASDAQ: WDC), develops innovative, advanced hard disk drives, enterprise-class solid state drives, external storage solutions and services used to store, preserve and manage the world's most valued data. HGST addresses customers' rapidly changing storage needs by delivering intelligent storage devices that tightly integrate hardware and software to maximize solution performance. Founded by the pioneers of hard drives, HGST provides high-value storage for a broad range of market segments, including Enterprise, Cloud, Datacenter, Mobile Computing, Consumer Electronics and Personal Storage. HGST was established in 2003 and maintains its U.S. headquarters in San Jose, California. For more information, please visit the company's website at

This press release contains forward-looking statements, including statements relating to expected demand for certain categories of SSDs and our ability to deliver and availability dates for SSD products. These forward-looking statements are subject to risks and uncertainties that could cause actual results to differ materially from those expressed in the forward-looking statements, including changes in markets, demand, technology challenges and limitations, global economic conditions and other risks and uncertainties listed in Western Digital's recent SEC filings, to which your attention is directed. Readers are cautioned not to place undue reliance on these forward-looking statements, which speak on as of the date hereof, and HGST/WD undertakes no obligation to update these forward-looking statements to reflect subsequent events or circumstances.

One GB is equal to one billion bytes, and one TB equals 1,000 GB (one trillion bytes). Actual capacity will vary depending on operating environment and formatting.

All trademarks are properties of their respective owners.


Erin Hartin


Office: 303-284-7790

[email protected]

Katie Watson

Voce Communications

Mobile: 408-439-2002

[email protected]

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SOURCE HGST, A Western Digital Company

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