Western Digital Black2 Dual Drive Review (1TB HDD/120GB SSD) – Combining SSD Performance with HDD Capacity

WD BLACK2 DUAL DRIVE BENCHMARKS

Our final set of benchmarks represent testing of the WD Black2 Dual Drive after the partition software has been downloaded and installed.  Again, the system designates it as drive letter C: in the applicable screenshots.

CRYSTAL DISK INFO VER. 5.6.2

WD Black2 after migration and partition software install CrystalDiskInfo

Crystal Disk Info is looking at the entire disk of 1120.2 GB; note that in the upper left corner of the window it shows both “C: and D:”.  S.M.A.R.T. and TRIM are both in bold in the features area, indicating that both are enabled.  Health status shows as “Good.”

ATTO DISK BENCHMARK VER. 2.46

WD Black2 after migration and partition software install ATTO

The ATTO read speeds are the high point of our benchmarks. The SSD only attained 423-427 MB/s reads at the larger transfer sizes, with a single spike to 461 MB/s at the 4096KB transfer size.  The HDD/SSD dual drive setup attains 439 MB/s or faster at all transfer sizes of 256KB and larger. We see over 460 MB/s speeds at the four largest transfer sizes, peaking at 465-467 MB/s.  We are definitely seeing more speed and consistency at the larger transfer sizes of compressible data.

No matter the benchmark, whether compressible or incompressible data,  we are seeing that both the SSD and the dual drive setup with the partition software installed seem to have writes “capped” at about 145-147 MB/s.

CRYSTAL DISK BENCHMARK VER. 3.0 X64

WD Black2 after migration and partition software install CrystalDiskMark zero fillWD Black2 after migration and partition software install CrystalDiskMark random

The results of our Crystal Disk Mark testing are remarkably similar for both the zero fill and random test runs.  The HDD/SSD dual drive comes up just short of the 400 MB/s threshold for reads, and again hits the 145-147 MB/s cap we have seen consistently.

AS SSD BENCHMARK VER. 1.7

WD Black2 after migration and partition software install AS SSD MBsWD Black2 after migration and partition software install AS SSD IOPS

Our AS SSD testing results are a bit of a mixed bag.  Considering that AS SSD generally shows worst case scenario speeds, the sequential read speeds of 431 MB/s is a bit of a pleasant surprise.  We see random 4K reads of over 51,000 IOPS, which is certainly respectable for utilizing a 120GB SSD.

One of the low points of our report is the access time of 16.150 ms, which is even slower than the HDD by itself.  Considering that the SSD alone had an access time of only 0.087 ms, we would think that this would be something that may be able to be “tweaked” with a future firmware update.

WD Black2 after migration and partition software install AS SSD copy benchmark

In our copy benchmark tests, the results of the HDD/SSD dual drive were nearly identical to those of the SSD alone.

ANVIL STORAGE UTILITIES PROFESSIONAL

WD Black2 after migration and partition software install Anvil Storage Utilities

Anvil results for the HDD/SSD dual drive were again nearly identical to those of the SSD alone.  The SSD by itself scored 2603.65, while the Black2 dual drive nipped at its heels with a score of 2600.87.  Results in most of the individual categories showed differences of 3% or less.

PCMARK VANTAGE X64 HDD SUITE

WD Black2 SSD only PCMark Vantage

Our PCMark Vantage HDD suite score was, a bit surprisingly, a good bit higher than the SSD alone.  The SSD by itself scored 44590, whereas the dual drive setup scored 57023, representing a nearly 28% increase!  This was likely fueled by the boost in compressible sequential read speeds at higher queue depths.

6 comments

  1. I’m no much of a laptop person and i think it wont do me any good since i use mine for work(not on desk) and its constantly moving, and hdds parts are kind a risky, so 100% SSDs for laptops or any mobile device. But i wike to see bigger HDD for work at home ! Very helpful review !

  2. the NAND is known to be 20nm but you don’t know the vendor? how is that? technically Sandisk and Tosh do not have 20nm process.

  3. I bought one of these and have installed it with programs on SSD and data on the 1TB HDD.
    I find the 1TB HDD slow to respond to document opening etc. I would have preferred a 7,200 rpm HDD connected to the SSD

  4. Love this product… Installed it 6 months ago and it made my 3 year old laptop respond faster than my friends 2015 gaming laptops (with sshd in it). Money well spent.

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