The WD Black2 Review: World's First 2.5" Dual-Drive
by Kristian Vättö on January 30, 2014 7:00 AM ESTRandom Read/Write Speed
The four corners of SSD performance are as follows: random read, random write, sequential read and sequential write speed. Random accesses are generally small in size, while sequential accesses tend to be larger and thus we have the four Iometer tests we use in all of our reviews.
Our first test writes 4KB in a completely random pattern over an 8GB space of the drive to simulate the sort of random access that you'd see on an OS drive (even this is more stressful than a normal desktop user would see). I perform three concurrent IOs and run the test for 3 minutes. The results reported are in average MB/s over the entire time. We use both standard pseudo randomly generated data for each write as well as fully random data to show you both the maximum and minimum performance offered by SandForce based drives in these tests. The average performance of SF drives will likely be somewhere in between the two values for each drive you see in the graphs. For an understanding of why this matters, read our original SandForce article.
Random IO performance is relatively low per today's standards but not truly horrible. I was expecting something worse but the JMF667H turns out to be rather competitive with popular big brand drives like the Samsung 840 EVO and Crucial M500.
Sequential Read/Write Speed
To measure sequential performance I ran a 1 minute long 128KB sequential test over the entire span of the drive at a queue depth of 1. The results reported are in average MB/s over the entire test length.
The same goes for sequential performance. It's not bad but there are far better options at 120/128GB.
AS-SSD Incompressible Sequential Read/Write Performance
The AS-SSD sequential benchmark uses incompressible data for all of its transfers. The result is a pretty big reduction in sequential write speed on SandForce based controllers.
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MrSpadge - Thursday, January 30, 2014 - link
Yeah, with the current product choices and price point they're effectively betting "People, please don't buy this!" and will probably wonder about low sales at some point. Seagate introduced a 2 TB 2.5" drive with standard 9.5 mm height a few months ago - that's pretty impressive, but might not have enough space left for an mSATA SSD due to it using 3 platters.ImSpartacus - Thursday, January 30, 2014 - link
For $300, you could easily get a ~500GB SSD.I feel like the black2 @ $300 is only useful for people that absolutely need that extra 620GB of storage in a single 2.5" drive.
hucklongfin - Saturday, February 1, 2014 - link
I guess I'm old (and I am), but I remember paying $700 for a 70mb drive (Micropolis?) back in the late 80's and not asking too many questions because I assumed it "fell" off the back of a truck.. I put it in my ALR 386 with a 1006 1:1 controller. It was the bomb back in the day. I have a long memory so lot of stuff doesn't seem that expensive to me!Frangelina - Saturday, February 1, 2014 - link
That's what I did to my 8470p. An M4 256 and a momentus XT500 I bought a year ago at NE for $79 in a caddy for the DVD slot.Tuvok86 - Thursday, February 6, 2014 - link
This is exactly what I did years ago, upgraded to 128GB ssd and switched the cd drive with the stock 500GB hd.This thing would have been great at that time but nowadays, seriously, you can get a 500GB ssd, even preinstalled, even cheaper. Too little, too late.
philipma1957 - Thursday, February 6, 2014 - link
price is way too high . 290 for 1.12 tb storage a crucial 960gb ssd is 400 on sale a samsung 1tb ssd is 500 on sale. why pay 290 for a clearly inferior product. Now if it was 250 gb plus 1.5tb for 290 it would make some sense.twtech - Saturday, February 15, 2014 - link
Even in the case where you need a lot of storage with just one bay, I'd argue that a 1TB SSD would still be a significantly superior option from a performance and power consumption standpoint, and you can buy a Samsung 840 series on Newegg right now for only a couple hundred dollars more. So that even further narrows the target market for this drive.danwat1234 - Wednesday, January 21, 2015 - link
Now it's only $130 on Newegg!!Aseries - Friday, February 20, 2015 - link
The real world price of this device is down to $128 at Amazon.tipoo - Thursday, January 30, 2014 - link
So being a manually managed dual disk, could someone configure this as a Fusion Drive or similar?