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the Fastest Solid State Disks (SSDs)

the fastest SSDs
When Cheaperbyte's boss said - "Accelerate your storage!"
he knew just the right way to do it.
1.0" SSDs 1.8" SSDs notebook SSDs 2.5" SSDs 3.5" SSDs InfiniBand PCIe SSDs
flash SSDs hybrids RAM SSDs FC SSDs rackmount SSDs SAS SSDs SATA SSDs
the SSD Buyers Guide
the Top 10 SSD Companies
Can you trust flash SSD specs?
Debunking Tier 0 Storage Babble
3 Easy Ways to Enter the SSD Market
SSD Myths and Legends - "write endurance"
Understanding Flash SSD Performance (pdf)
RAM SSDs versus Flash SSDs - which is Best?
Z's Laws - Predicting Future Flash SSD Performance
Calling for an End to Unrealistic SSD vs HDD IOPS Comparisons
click for  SSD white papers from TMS
Editor's intro:- You'll often see news stories that say such and such a manufacturer has launched the "fastest SSD". But how can they all be true?

Sad to relate - but often they are not. Other storage publications - which only have a superficial grasp of this market - publish many claims which are completely wrong because they aren't aware of the hundreds of other SSD products already available in the market.

Another problem is that many magazine and vendor published SSD benchmarks are unreliable due to halo effects.

If SSD speed is your thing - you've come to the right place. We've published SSD listings in our directories for over a decade, and there has been a dedicated online SSD Directory here on STORAGEsearch.com since 1998. And way back in prehistory I was designing systems which worked with neanderthal SSDs nearly 3 decades ago.
Violin 1010 - world's densest  DRAM  array -  for  HPC and data center server acceleration
world's fastest 2U flash / RAM based SSDs
from Violin Memory
Speed isn't everything* and it comes at a price. But if you need the speediest SSD then wading through the web sites of over 130 current SSD oems to find a suitable candidate slows you down. And the SSD search problem will get worse. I've done the research for you to save you time. And this page is updated daily from storage news and direct inputs from oems.

* Speed isn't everything - but it is important. According to the world's first SSD Buyer Preference Survey - in answer to the question "Why Do People Use Solid State Disks?" - the #1 reason given was - "Application speedup" - cited by 76% SSD buyers.

That emphasis on speed is still true today - because this "Fastest SSDs" article was one of the top 5 most popular articles read by readers in the previous month (out of many thousands).
Easyco enterprise flash SSD 1U, 2U or 3U silver or black
high IOPS NAS enterprise flash SSDs
from EasyCo
the Fastest in-production shipping SSDs - July 2, 2009 - © STORAGEsearch.com
form factor manufacturer model technology interface performance metrics and notes
rackmount
4U
Texas Memory Systems RamSan-440 RAM SSD Fibre Channel 4,000MB/s random sustained external throughput, 600,000 random IOPS
rackmount
3U
Texas Memory Systems RamSan-400 RAM SSD Fibre Channel
InfiniBand
3,000MB/s random sustained external throughput, 400,000 random IOPS
rackmount
2U
Violin Memory Violin 1010 RAM SSD PCIe 1 million random IOPS on a single port. 1,400MB/s read, 1,00MB/s write with ×4 PCIe, 3 microseconds latency
Solid Access Technologies USSD 320 RAM SSD Fibre Channel
SAS
SCSI
100,000 random IOPS on a single FC port. Upto 320,000 IOPS in a single 2U chassis. 4,000MB/s aggregated bandwidth via 6 FC links.
rackmount
1U
Solid Access Technologies USSD 310 RAM SSD Fibre Channel
SAS
SCSI
Up to 130,000 IOPS in a single 1U chassis. 1,500MB/s aggregated bandwidth via 2 full duplex FC links. 10 microseconds latency.
Superior Data Solutions SpeedStor Flash SSD Fibre Channel Upto 200,000 read IOPS, and 72,000 write IOPS. Aggregate throughput is 800MB/s read 400MB/s writes. (This is the fastest factory configured 1U flash SSD - but there is no RAID protection for the SSD modules inside this box.)
EasyCo 1U 8 drive MFT Appliance Flash SSD NAS Upto 50,000 read IOPS, and 40,000 write IOPS. (Includes internal RAID-5 protection.)
3.5" SandForce SF-1000 (in adapter) Flash SSD SATA 250MB/s sustained R/W. 30,000 R/W IOPS (symmetric R/W performance)
Density Dynamics DDR2 jet.io RAM SSD Fibre Channel 400MB/s R/W, 10µS latency
2.5" SandForce SF-1000 Flash SSD SATA 250MB/s sustained R/W. 30,000 R/W IOPS (symmetric R/W performance)
DTS Platinum SSD Flash SSD SATA 250MB/s sustained R/W. 40,000 random IOPS.
Foremay SC199 Cheetah V Flash SSD SATA 260MB/sec read, 250MB/sec write, 42,000 IOPS
1.8" SandForce SF-1200 Flash SSD SATA 250MB/s sustained read, 200MB/s sustained write, 5,000 R/W IOPS
PhotoFast G-Monster Flash SSD SATA R/W speeds upto 230MB/s and 160MB/s respectively. (notebook SSD)
1" Viking Modular Solutions SATA Cube Flash SSD SATA Sustained R/W speeds are 110MB/s and 79MB/s respectively
PCIe card Fusion-io ioDRIVE-Duo Flash SSD single bus slot 1.5GB/s read, 1.4GB/s write, 129K IOPS (75% R, 25% W mix)
PCI card Micro Memory MM-5435CN RAM SSD bus 521MB/s sustained read / write
compactPCI card Vanguard Rugged Storage cPCI Flash Drive Flash SSD bus 40MB/s sustained read/ write
PMC / XMC card Curtiss-Wright XMC-550 Flash SSD bus 50MB/s R/ W
CompactFlash card STEC MACH4 CompactFlash Flash SSD bus 90MB/s read, 55MB/s write
ExpressCard PhotoFast G-Monster Express card 54 Flash SSD bus 180MB/s read, 100MB/s write
Notes:- all rackmount SSDs listed above include internal data protection (such as RAID or similar) unless otherwise stated.
Footnote:- the Higher Cost of Higher Performance

Although the starting point for SSD performance is that old flash versus RAM debate the performance of the fastest products (like those listed here) is a business as well as a technical decision.

Make the product too expensive and not enough customers will buy it.

The 1U rackmount form factor is a curious example where a few years ago you could actually buy a much faster product than is available today. But I'm guessing the capacity of those older systems didn't best suit enough customers at that performance level and that price - because that product is no longer available. Customers need a feature set (speed, capacity, interface and price) that suits their application. Getting the speed right is just a small part of the mix (although in the context of this article - it's the most important

Manufacturers can leverage the intrinsic memory performance in 2 main areas
  • the degree of parallelization in the memory array and the bandwidth of the internal memory bus.

    Although everyone has access to similar RAM or flash chips - how you connect up the internal memory array can make a 10 to 1 performance difference in commercially available SSDs - depending on what the designer had in mind as the main market. That pushes some complexity and constraints back onto the SSD controller and makes it more complex / expensive. The complexity caused by virtualizing the SSD due to internal constraints (such as physical memory block sizes) becomes greater - for flash - above about x10 to x50. It is possible to solve that problem with more complexity in the host interface cache - but then other factors start to impose constraints such as avoiding a high volume of spurious block writes which could impact endurance.
  • the implementation of the SSD controller and host bus interface.

    Just as in RAID controllers you get a wide range of performance in the market depending how oems have chosen to implement critical functions (speed versus power, speed versus cost, programmable architecture versus hard wired etc) you get similar tradeoffs in an SSD product. But unlike a host bus adapter designed for use with slow hard disks the impact of the SSD controller is much more visible as an intrinsic limiter or enabler of key performance attributes.
Behind many of the simple to deploy fast products in the SSD market listed here lie many years of hard effort, product development and customer feedback, market trials and futuristic vision.

The race to market the fastest SSDs is getting more competitive.
  • More contestants.
  • Bigger prizes.
Who's going to win?

The market will decide. Stay tuned to the SSD page to see what happens next.


Other related articles:-

...Later:- this article - the Fastest Solid State Disks - has become one of the top 5 articles viewed by readers.

Although most users don't buy or need the absolutely "fastest" products - the table above gives them an idea of the performance limits available in the form factors which suit their applications.

Users understand very well that if they're buying an SSD that's slower than the models listed above - they can reasonably expect it to be cheaper too. There's usually a spread of performance in each form factor - and the figures listed above - should help them recognize when the product they're being offered is an older design and a long way behind the state of the art.

You'd be surprised how many times I get contacted by irate SSD product marketers who say something like "I've got a rackmount SSD which is faster than the 2.5" models listed - so why isn't my product listed too."

In 99% of such cases the rackmount SSD which they are suggesting I add to this list is 2x to 10x slower than some other product which is already listed in that physical size - so the answer is obvious. "If the customer has got a 2.5 inch size slot - then they can't fit your rackmount product in."

I get dialog about this list every week - and the discussion with vendors of the nominated products often goes very deep - resulting in some cases in a request by me to remeasure the performance if I don't believe the specifications.

In some of the highest volume form factors I've started to list 2-3 "fastest" products. That's intended to be helpful in situations where that particular market splits by major interface or some other technical / application factor.
2.5"   flash SSDs  from Memoright
2.5" 128GB flash SSDs
120MB/sec sustained read/write
and 800 write IOPS - from Memoright
.
.
Z's Laws - Predicting Future Flash SSD Performance
A reader asked me a very good question.

"Is there an industry roadmap for future flash SSD performance?"

That prompted other questions like...
  • How fast are flash SSDs going to be in 2009?, 2010? or 2012?
  • What are the technology factors which relate to flash SSD throughput and IOPS?
  • How close will flash SSDs get to RAM SSD performance?
There wasn't a simple answer I could give at the time. Clues lay scattered all across this web site and in my many one on one discussions with readers about the market...
predicting the future article But I agreed there should be a single place on the web where these answers could be found.

Forget Moore's Law. That gives you the wrong answer, and this article explains why. ...read the article

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