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Written by Olin Coles   
Monday, 08 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

EVEREST Disk Benchmark

Many enthusiasts are familiar with the EVEREST benchmark suite by Lavalys, but very few are aware of the Disk Benchmark tool available inside the program. The EVEREST Disk Benchmark performs linear read and write bandwidth tests on each drive, and can be configured to use file chunk sizes up to 1MB (which speeds up testing and minimizes jitter in the waveform). Because of the full sector-by-sector nature of linear testing, Benchmark Reviews endorses this method for testing SSD products, as detailed in our Solid State Drive Benchmark Performance Testing article. However, Hard Disk Drive products suffer a lower average bandwidth as the capacity draws linear read/write speed down into the inner-portion of the disk platter. EVEREST Disk Benchmark does not require a partition to be present for testing, so all of our benchmarks are completed prior to drive formatting.

The high-performance storage products tested with EVEREST Disk Benchmark are connected to the Marvell SE9128 3rd-Generation SATA-6.0Gbps adapter integrated on the Gigabyte GA-X58A-UD7 motherboard. Using the 1MB block size, read performance of the WD SiliconEdge-Blue 256GB Solid State Drive measured an average 238.1 MBps with a similar maximum peak of 240.3 MBps. Linear write-to tests were next...

EVEREST-Read_Western-Digial-SilionEdge-Blue-256GB-SATA-3G-SSD.png

Linear disk benchmarks are superior tools in my opinion, because they scan from the first physical sector to the last. A side affect of many linear write-performance test tools is that the data is erased as it writes to every sector on the drive. Normally this isn't an issue, but it has been shown that partition table alignment will occasionally play a role in overall SSD performance (HDDs don't suffer this problem). The large buffer and fast NAND flash memory on the 256GB WD SiliconEdge-Blue Solid State Drive helped improve results in our linear write testing, as shown in the waveform chart below.

The waveform chart below illustrates how the buffer fails to keep-up with transfers, and makes linear write performance appear unsteady. The results seen here are still relatively consistent compared to most other SSD products we've tested in the past. The WD SiliconEdge-Blue recorded an average linear write-to speed of 181.4 MBps, with a maximum performance of 183.9 MBps. The buffer appears to falter every 8MB or so; although performance is only momentarily impacted and the average is still better than WD's stated write-to performance.

EVEREST-Write_Western-Digial-SilionEdge-Blue-256GB-SATA-3G-SSD.png

The chart below shows the average linear read and write bandwidth speeds for a cross-section of SATA storage drives attached to the 3rd-generation SATA-6.0Gbps HBA:

EVEREST-Disk-Benchmark_Marvell-SE9128.png

Linear bandwidth certainly benefits the Solid State Drive, since there's very little fluctuation in transfer speed. Hard Disk Drive products decline in performance as the spindle reaches the inner-most sectors on the magnetic platter. I personally consider linear tests to be the single most important comparison of storage drive products, although hard disk drive products decrease performance as they reach the edge of the spindle, SSD products operate at a relatively smooth speed from start to finish.

Drive Hardware

In the next section, Benchmark Reviews tests sequential performance using the CrystalDiskMark software tool...



 

Comments 

 
# 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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