Tech content trusted by users in North America and around the world
7,297 Reviews & Articles | 53,241 News Posts

SanDisk ULLtraDIMM DDR3 400GB SSD Enterprise Review

By: Paul Alcorn | SSDs in IT/Datacenter | Posted: Nov 10, 2014 2:05 pm
TweakTown Rating: 97%Manufacturer: SanDisk

Guardian Technology Platform

 

sandisk_ulltradimm_ddr3_400gb_ssd_enterprise_review_125

 

SanDisk's award-winning Guardian Technology Platform is a proprietary approach that manages the physics of the NAND, and not just the errors. It consists of three integral components.

 

- FlashGuard

 

sandisk_ulltradimm_ddr3_400gb_ssd_enterprise_review_126

 

SanDisk subjects all NAND to an extensive characterization process before assembly. Aggregated flash management ensures there is an even distribution of different classes of NAND to benefit the whole. Once assembled, the Guardian Technology Platform takes over, and NAND settings are monitored and adjusted constantly. Retention and wear metrics are typically programmed during NAND processing, and never altered. With Guardian, adaptive programming tailors the NAND settings at the base level by dynamically adjusting flash parameters over the course of the SSDs life. This creates an exponential increase in NAND endurance.

 

As NAND geometries shrink, endurance also shrinks, and data errors multiply. SMART utilizes adaptive ASP (Advanced Signal Processing) in concert with advanced two-level BCH ECC algorithms to combat data errors. Typical SSDs can only achieve wear leveling on each NAND package, but Aggregated Flash Processing treats all of the flash elements as a whole, and provides global cross-die wear leveling. The wear leveling algorithms also monitor the health of individual flash cells, and dynamically focuses the heaviest workloads on the healthiest flash. The result is impressive endurance metrics. The ULLtraDIMM provides ten DWPD of random write endurance, and 25 DWPD for sequential write workloads.

 

 

- DataGuard

 

DataGuard provides full data path protection, and the F.R.A.M.E. (Flexible Redundant Array of Memory Elements) functionality. F.R.A.M.E. is a cross-die data redundancy feature, similar to parity, which allows for data reconstruction in the event of a catastrophic event, such as a flash page or block failure (some incarnations can even recover from an entire die failure). This internal XOR provides embedded fault tolerance, and a BER rating of one unrecoverable error per 10^17.

 

 

- EverGuard

 

EverGuard is a third generation host power-loss protection design that protects against unexpected power interruptions. An array of discrete PolyTantalum capacitors provides power to flush all data in transit to the NAND during power loss. These Tantalum capacitors are rated for high temperature environments, and do not experience degradation over time. There are additional architectural features, such as advanced controller power management and lower pages reserved for power-down writes, that reduce the power hold up time requirements. The entire MCS chipset falls under the EverGuard umbrella, providing power backup for early-commit operations.

    PRICING: You can find products similar to this one for sale below.


    United States: Find other tech and computer products like this over at Amazon's website.

    United Kingdom: Find other tech and computer products like this over at Amazon UK's website.

    Canada: Find other tech and computer products like this over at Amazon Canada's website.

    We at TweakTown openly invite the companies who provide us with review samples / who are mentioned or discussed to express their opinion of our content. If any company representative wishes to respond, we will publish the response here.

Related Tags

Got an opinion on this content? Post a comment below!
Subscribe to our Newsletter

Latest News Posts

View More News Posts
View Our Latest Videos

Forum Activity

View More Forum Posts

Press Releases

View More Press Releases
loading