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IOPS Scaling (SSD)
In these tests, we tested the drive's ability to tackle multiple input/output operations. Again, we compared the SSD component of the WD Black² (WD1001X06XDTL) to the industry standards - the Intel 520 Series SSD and the Intel X25-M G2. If you wish to see how the WD Black² compares to other solid state drives, take a look at our Solid State Drive Performance Comparison Guide, which we will be updating shortly.
The Western Digital Black² really took a beating in these tests. The JMicron JMF667H SSD controller is obviously out of the league when it comes to handling multiple input/output operations. Of course, the Black² dual drive is designed for use in laptops and are unlikely to see such rigorous usage patterns. Overall though, it pegs the Black²'s performance as between that of the Intel 520 Series SSD and the Intel X25-M G2.
4 KB Random Read
Outstanding I/Os |
WD Black² |
Intel 520 Series |
Intel X25-M G2 |
Difference |
1 |
6,079 IOPS |
13,456 IOPS |
5,214 IOPS |
- 54.8% |
8 |
29,080 IOPS |
43,535 IOPS |
28,944 IOPS |
- 33.2% |
32 |
53,726 IOPS |
63,251 IOPS |
48,085 IOPS |
- 15.1% |
4 KB Random Write
Outstanding I/Os |
WD Black² |
Intel 520 Series |
Intel X25-M G2 |
Difference |
1 |
12,436 IOPS |
17,839 IOPS |
13,171 IOPS |
- 30.3% |
8 |
35,696 IOPS |
42,580 IOPS |
13,637 IOPS |
- 16.2% |
32 |
35,537 IOPS |
48,458 IOPS |
19,098 IOPS |
- 16.8% |
512 KB Random Read
Outstanding I/Os |
WD Black² |
Intel 520 Series |
Intel X25-M G2 |
Difference |
1 |
615 IOPS |
704 IOPS |
373 IOPS |
- 12.6% |
8 |
686 IOPS |
759 IOPS |
395 IOPS |
- 9.7% |
32 |
664 IOPS |
759 IOPS |
396 IOPS |
- 12.4% |
512 KB Random Write
Outstanding I/Os |
WD Black² |
Intel 520 Series |
Intel X25-M G2 |
Difference |
1 |
280 IOPS |
448 IOPS |
196 IOPS |
- 37.4% |
8 |
282 IOPS |
460 IOPS |
198 IOPS |
- 38.7% |
32 |
280 IOPS |
466 IOPS |
198 IOPS |
- 39.9% |
4 KB Sequential Read
Outstanding I/Os |
WD Black² |
Intel 520 Series |
Intel X25-M G2 |
Difference |
1 |
9,207 IOPS |
15,900 IOPS |
17,401 IOPS |
- 42.1% |
8 |
34,151 IOPS |
48,823 IOPS |
49,557 IOPS |
- 30.1% |
32 |
53,995 IOPS |
63,846 IOPS |
49,038 IOPS |
- 15.4% |
4 KB Sequential Write
Outstanding I/Os |
WD Black² |
Intel 520 Series |
Intel X25-M G2 |
Difference |
1 |
12,627 IOPS |
17,604 IOPS |
14,058 IOPS |
- 28.3% |
8 |
36,079 IOPS |
42,444 IOPS |
22,101 IOPS |
- 15.0% |
32 |
35,753 IOPS |
42,467 IOPS |
22,276 IOPS |
- 15.8% |
512 KB Sequential Read
Outstanding I/Os |
WD Black² |
Intel 520 Series |
Intel X25-M G2 |
Difference |
1 |
621 IOPS |
708 IOPS |
501 IOPS |
- 12.4% |
8 |
712 IOPS |
759 IOPS |
509 IOPS |
- 6.2% |
32 |
701 IOPS |
759 IOPS |
487 IOPS |
- 7.7% |
512 KB Sequential Write
Outstanding I/Os |
WD Black² |
Intel 520 Series |
Intel X25-M G2 |
Difference |
1 |
280 IOPS |
447 IOPS |
197 IOPS |
- 37.3% |
8 |
282 IOPS |
459 IOPS |
199 IOPS |
- 38.6% |
32 |
281 IOPS |
461 IOPS |
199 IOPS |
- 39.1% |
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• The Western Digital Black² Dual Drive |
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• Peeking Under The PCB, SSD Controller |
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• Testing The Black², Usable Capacities |
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