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Written by Olin Coles   
Thursday, 10 February 2011
Table of Contents: Page Index
Zalman N-Series Sandforce SSD SSD0128N1
Features and Specifications
Closer Look: Zalman N-Series SSD
SandForce SF-1200 SSD Controller
SSD Testing Methodology
AS-SSD Benchmark
ATTO Disk Benchmark
CrystalDiskMark 3.0 Tests
Iometer IOPS Performance
EVEREST Disk Benchmark
HDD vs Hybrid Drive vs SSD
Zalman N-Series SSD Conclusion

Iometer IOPS Performance

Iometer is an I/O subsystem measurement and characterization tool for single and clustered systems. Iometer does for a computer's I/O subsystem what a dynamometer does for an engine: it measures performance under a controlled load. Iometer was originally developed by the Intel Corporation and formerly known as "Galileo". Intel has discontinued work on Iometer, and has gifted it to the Open Source Development Lab (OSDL). There is currently a new version of Iometer in beta form, which adds several new test dimensions for SSDs.

Iometer is both a workload generator (that is, it performs I/O operations in order to stress the system) and a measurement tool (that is, it examines and records the performance of its I/O operations and their impact on the system). It can be configured to emulate the disk or network I/O load of any program or benchmark, or can be used to generate entirely synthetic I/O loads. It can generate and measure loads on single or multiple (networked) systems.

To measure random I/O response time as well as total I/O's per second, Iometer is set to use 4KB file size chunks over a 100% random sequential distribution at a queue depth of 32 outstanding I/O's per target. The tests are given a 50% read and 50% write distribution. While this pattern may not match traditional 'server' or 'workstation' profiles, it illustrates a single point of reference relative to our product field.

The chart below illustrates combined random read and write IOPS over a 120-second Iometer test phase, where highest I/O total is preferred:

Iometer_Random_4K-IOPS_30QD_Results.png

From the onset, SandForce SSDs clearly outperform the competition when tested which a larger queue depth. In our Iometer tests, which use 32 outstanding I/O's per target and a random 50/50 read/write distribution, only the 'unrestricted' SandForce SSDs approach 50,000 IOPS. Zalman's N-Series promises up to 25,000 IOPS each way for a total of 50K, and it managed to deliver an impressive 42,614 in our tests. All of the SandForce-driven SSDs demonstrate the highest IOPS performance we've ever seen on a consumer storage device, and 'unlocked' firmware further extends the performance level to as high as 50,000 IOPS. Benchmark Reviews discusses this topic in more detail in our SandForce SF-1200 SSD Firmware Comparison article.

In our next section, we test linear read and write bandwidth performance and compare its speed against several other top storage products using EVEREST Disk Benchmark. Benchmark Reviews feels that linear tests are excellent for rating SSDs, however HDDs are put at a disadvantage with these tests whenever capacity is high.



 

Comments 

 
# SSD is the way to goCom-Tek Chris 2011-02-10 20:57
Although I do not currently own this drive my current drive has the Sandforce controller and man does it smoke! I have 2x 120gig OCZ's in Raid 0 and the performance is stellar.
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# RE: SSD is the way to goWhyNotV2 2011-02-11 03:42
I agree that SSD is the way to go, but as the reviewer stated, it's the price point that's keeping myself and others away from full adoption. I also don't own the drive reviewed I also don't use one in my desktop as I favor the VelociRaptor 740 (running plenty strong since purchased in 2004) with other WD 7200rpm drives for storage and non-essential programs as a secondary drive(s). I do use a 64GB RunCore SSD in my HP netbook (1030nr) running the full version of Windows 7. I love both products, but while the raptor drives exist and the SSD technology is still young, I can't make the leap. As always, I will keep my eye out for price drops, trim/garbage improvements, etc. (thanks benchmarkreviews!!!) in hopes that in the months/years to come the price, stability, performance and longevity of SSDs nears that of the VelociRaptor drives.
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# RE: Zalman N-Series Sandforce SSD SSD0128N1Robert17 2011-02-12 03:03
Good review. Anything in the included documentation as to this being 34nm technology? I've included an article link below that I found interesting. Maybe the technology is reaching some limits to nand production/performance. Maybe we're about to see rapid (or more rapid) competition of the SSD controller development/deployment. That seems to be amongst the better design improvements anyway.

##nordichardware.com/news/86-storage/42306-25nm-nand-forces-ssd-makers-to-limit-storage.html

It also makes me think that hybrid drive development may get a push when thinking of nand, controllers, price, and real world applications. Any word on the street of upcoming changes in the industry?
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# RE: RE: Zalman N-Series Sandforce SSD SSD0128N1Olin Coles 2011-02-12 06:59
Sorry Robert, but the Zalman documentation is VERY scarce on information. I had to write to the manufacturer just to find out what the rated IOPS for this drive was. It is unlikely that this SSD is using 34nm technology, as it's physically the same drive as other SF-1200 SSDs. All that separates most SandForce-driven SSDs is firmware licensing.
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# Crucial?JAMF 2011-02-12 03:31
It would be nice if the Crucial RealSSD drives were tested, to see how they stack up.
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# OopsJAMF 2011-02-12 03:35
Was looking at the Random 4k/QD32 results as I wrote this. I wouldn't have thought it be that far down the list.
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# RE: OopsOlin Coles 2011-02-12 07:00
Glad you found it. While the Crucial RealSSD C300 is very fast, it's not so great at managing the same operational workload as SandForce SSDs.
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# RE: Zalman N-Series Sandforce SSD SSD0128N1aberkae 2011-02-12 08:17
Anyone know when we will see ssds with sanforce 2500 and 2600 controllers?
The C300 fell in price to $450 for 256 gig, and OCZ vertex 2 is usually on sale for 120 gig for $ 150 after MIR @ newegg. The revo x2 is on sale to as well for $ 564.
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# RE: RE: Zalman N-Series Sandforce SSD SSD0128N1Olin Coles 2011-02-12 08:26
March or later. Even then, the new SandForce SSDs are targeted towards enterprise storage.
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# HeightEmilio 2011-05-24 14:22
Hi, can someone tell me the height of this remarkable ssd? Thanks in advance!
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# RE: HeightOlin Coles 2011-05-24 15:52
Measured with calipers for you: 2.75" wide, 0.40" tall, and 3.95" long.
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# RE: HeightEmilio 2011-05-24 17:56
Thank you very much for your fast response, but 2.40 inch tall? Is this correct? That is about 60 milimmeters, I was hoping something between 9,5 and 12 milimeters. Perhaps 2.4 is the tall of the box?
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# RE: RE: HeightOlin Coles 2011-05-24 18:03
Oops, that's supposed to be 0.40" tall. I'll fix it.
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# Thanks!Emilio 2011-05-26 11:45
Thank you!!! Im going to buy this SSD for my hp mini 311, wich uses a 0.37" drive. That is less than 1 mm of difference. Dont think it will be a problem. Thanks again.
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# RE: Thanks!Olin Coles 2011-05-26 13:32
What is the make and model of your current hard drive?
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