WD Black Dual-Drive 120GB SSD + 1TB HDD Hybrid Review


ATTO & AS-SSD Benchmarks

ATTO v2.47

ATTO is one of the oldest drive benchmarks still being used today and is still very relevant in the SSD world. ATTO measures transfers across a specific volume length. It measures raw transfer rates for both reads and writes and places the data into graphs that can be very easily interpreted. The test was run with the default runs of 0.5KB through 8192KB transfer sizes with the total length being 256MB.

ATTO – Intel Z77 Platform:


Benchmark Results: Because of the way the drive is designed, the reads reap the benefits of the SSD but the writes are hindered by the hybrid nature of the SATA controller which is painfully obvious in the benchmark results. Still, if I was to choose to have either speedy writes or reads, it’d be reads all day.


AS-SSD (1.6.4237.30508) Benchmark – Intel Z77 Platform:

We have been running the AS-SSD Benchmark app for over some time now and found that it gives a broad result set. The programmer has worked very hard on this software and continues to make updates often so if you use it, show him some love and send him a donation. There are now three tests that are found within the tool and we’ll show the results from two of them.


Benchmark Results: Here we see the same dynamic with the writes lagging considerably due to the HDD.

AS-SSD Compression Chart

Benchmark Results: No impact to performance from the level of data compressibility so the graph shows relatively flat slopes.