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Written by Olin Coles   
Tuesday, 09 March 2010
Table of Contents: Page Index
WD SiliconEdge-Blue SSD SSC-D0256SC-2100
Features and Specifications
First Look: WD SiliconEdge-Blue
JMicron JMF612 SSD Controller
SSD Testing Methodology
ATTO Disk Benchmark
HD Tune Pro Benchmarks
Iometer IOPS Performance
EVEREST Disk Benchmark
CrystalDiskMark Tests
SSD vs Hard Disk Drive
WD SiliconEdge-Blue SSD Conclusion

HD Tune Pro Benchmarks

The latest edition of HD Tune Pro allows random access read and write testing, a feature not available to other similar software benchmark tools. HD-Tune is a low-level test that will not operate on a drive which contains a partition, so Benchmark Reviews uses DISKPART to prepare hardware and remove any partitions before conducting these tests.

Random Access tests are divided into 512b, 4KB, 64KB, 1MB and random size test files sizes. The Random Access test measures the performance of random read or write operations. The amount of data which will be read varies from 512 bytes to 1 MB. Performance is reported in operations per second (IOPS), average access time, and average speed. Because it is our intent to compare one product against another, Benchmark Reviews has focused on 4KB and random transfer size IOPS performance.


Benchmark Reviews tested the 256GB WD SiliconEdge-Blue SSD against a collection of top-performing desktop storage drives for our IOPS benchmarks. The HD-Tune 4KB random operational performance measured 4820 (18.83 MBps) read IOPS, and 2788 (10.9 MBps) for write. In comparison, the SATA 6Gb/s Marvell-based Crucial C300 offered 7941-IOPS (31 MBps) read and 2451 (9.6 MBps) write performance, while the Indilinx-based Corsair X256 scored 7444-IOPS (29.1 MBps) read and 16244 (63.5 MBps) write, whereas the Toshiba-based Kingston SSDNowV+ SNVP325 produced 4855-IOPS (19 MBps) read and 2583 (10.1 MBps) write.


The tight range of IO is an indicator of operational bottlenecks. For example, the WD VelociRaptor WD3000HLFS SATA Hard Disk Drive indicates a total top-to-bottom read-IOPS range of 10-150 whereas the average SSD might offer 200-10,000. As a direct result, in most cases SSDs will offer a much higher IO over their hard disk counterparts. The random read/write operations per second is charted below:


Our test results were obtained after each SSD had been prepared using the DISKPART program with the "clean all" command. In our tests we discovered that the maximum performance results (charted) would decay as subsequent tests were performed on the Windows 7 Operating System, even with TRIM available. As a word of caution, alignment and garbage collection applications offer immediate but temporary restoration of original 'pristine' performance levels.

Drive Hardware

Benchmark Reviews measures I/O Response Time and IOPS performance using the Iometer tool in our next section...



# WD SSC-D0256SC-2100Kruis 2010-03-13 03:06
Amazing! No MLC or SLC mentioned, neither by WD.
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# MLC - It's in the review.Olin Coles 2010-03-13 08:02
This SSD uses MLC technology... it's mentioned in the review on two different pages.
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# In the end, they all come to OCZ support forumJenya 2010-06-14 11:04
IMHO every brand owned by ssd pioneers is mentioned there and supported by OCZ team and fans.
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# Nice Review!Zsolt 2010-07-23 00:54
Nice Review!

I buy into a WD 128 SSD, in spite I don´t like the MLC memory technology that much. This is why I choose WD, because I assume it will be still reliable in 2015. For this I am ready to overlook some performance drops (-10-40% to top performers), because I don´t want to spend 1-2 days on reinstalling all my stuff.
I hope I can put the drive into my Dell Studio 17 without any additonal parts needed.
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# Good driveAndre 2010-11-10 02:35
I replaced my 7200 rpm hdd with one of these bad boys from WD in 128 GB capacity. The computer is much much faster, with peak transfer of 350 MB/s and common numbers over 120 MB/s. I plan on getting more when prices drop.
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