Everspin ST-MRAM used in Buffalo memory SSD
Buffalo Memory's innovative SATA III SSD is the first to implement Spin Torque MRAM as cache memory
Everspin Technologies has announced that Buffalo Memory is introducing a new industrial SATA III SSD that incorporates Everspin's Spin-Torque MRAM (ST-MRAM) as cache memory.
In addition to breaking new ground as a SATA III SSD, this product is also the first to specify ST-MRAM for its cache. Buffalo Memory will showcase the new product at its booth (B-05) at the Embedded Technology 2013 conference held in Yokohama, Japan from November 20th to 22nd.
Everspin's next-generation ST-MRAM is a new category of MRAM that will accelerate data storage.
ST-MRAM uses an alternate method for programming an MTJ (magnetic tunnel junction) element that has the potential to further simplify the MRAM cell and reduce write power. Programming is accomplished by driving current directly through the MTJ to change the direction of polarisation. The read operation is accomplished by sensing the MTJ resistance.
Using a spin-polarised current for switching, ST-MRAM can overcome scaling limitations to address persistent DRAM applications in densities from megabits to gigabits.
Buffalo's SS6 series SATA III SSD with Everspin ST-MRAM cache improves tolerance for sudden power loss and reduces power consumption. SATA III runs up to 6.0 Gigabits per second, twice the rate of SATA II, which improves quality of service in high data rate applications.
SS6 series SATA III SSD with Everspin ST-MRAM cache improves tolerance for sudden power off and access time, saving some process steps which volatile memories need. Power consumption is also optimised as MRAM doesn't require cell refresh like DRAM.
"In the area of Embedded flash storage, we Buffalo Memory, have an advantage in firmware development that provides additional value for customers like tolerance for sudden power off using backup battery and DRAM as a cache memory," says Shuichiro Azuma, General Manager, R&D Division of Buffalo Memory. "Today we introduce our brand new platform of SATA III SSD, and we have started to develop the SSD with MRAM cache using this platform. We believe that it realises the best Industrial SSD for customers and we have pursued this innovation aggressively."
The new Buffalo SSD is designed with Everspin Technologies' 64Mb DDR3 ST-MRAM that performs as a persistent cache, with full DDR3 speed and non-volatility. Using ST-MRAM instead of traditional DRAM has eliminated the need for a backup battery or super capacitor to power the DRAM in the event of a power failure. An ST-MRAM cache is inherently non-volatile, so it retains cached data during a power failure, and it does not require the drive to flush the cached contents to NAND flash during a power loss.
"As an early adopter of ST-MRAM, Buffalo Memory is taking a bold step to continue as an innovator in the SSD market," explains Phill LoPresti, president and CEO of Everspin. "Spin-Torque MRAM technology will give Buffalo Memory a strong differentiator in the market for high-performance industrial SSDs."
The Everspin EMD3D064M 64Mb ST-MRAM is functionally compatible with the industry standard JEDEC specification for the DDR3 interface, providing designers the ability to quickly adopt ST-MRAM in storage and embedded systems.
Everspin Technologies is a developer and manufacturer of magnetic RAM (MRAM), offering stand-alone and embedded Toggle and Spin-Torque MRAM products. Everspin says it was the world's first volume MRAM supplier, with an intellectual property portfolio of more than 600 active patents and applications, many of which are fundamental and essential for MRAM technologies. Today Everspin delivers MRAM products to broad applications in the data centre and storage, energy and infrastructure, and automotive and transportation markets.