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IOPS Scaling
In these tests, we tested the drive's ability to tackle multiple input/output operations. Again, we compared the 3 TB Western Digital Red (WD30EFRX) to the 3 TB Western Digital Caviar Green (WD30EZRX), because it was the closest match and would have been used instead of the WD Red in a NAS system. For more performance comparisons, please take a look at The Hard Disk Drive Performance Comparison Guide.
4 KB Random Read
Outstanding I/Os |
WD Red (3 TB) |
WD Green (3 TB) |
Difference |
1 |
45 IOPS |
67 IOPS |
- 32.6% |
8 |
73 IOPS |
95 IOPS |
- 23.3% |
32 |
94 IOPS |
115 IOPS |
- 18.3% |
Although the WD Red's dual-core processor was hampered by the significantly slower random access time, it appeared to help close the gap as the number of sequential transactions increased.
4 KB Random Write
Outstanding I/Os |
WD Red (3 TB) |
WD Green (3 TB) |
Difference |
1 |
50 IOPS |
53 IOPS |
- 4.5% |
8 |
50 IOPS |
53 IOPS |
- 5.3% |
32 |
49 IOPS |
51 IOPS |
- 2.9% |
512 KB Random Read
Outstanding I/Os |
WD Red (3 TB) |
WD Green (3 TB) |
Difference |
1 |
28 IOPS |
36 IOPS |
- 20.9% |
8 |
29 IOPS |
36 IOPS |
- 18.4% |
32 |
38 IOPS |
36 IOPS |
+ 6.2% |
512 KB Random Write
Outstanding I/Os |
WD Red (3 TB) |
WD Green (3 TB) |
Difference |
1 |
36 IOPS |
36 IOPS |
- 1.2% |
8 |
36 IOPS |
36 IOPS |
+ 0.7% |
32 |
36 IOPS |
36 IOPS |
- 0.8% |
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• The 3 TB Western Digital Red |
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• Peeking Under The PCB |
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• Testing The 3 TB Western Digital Red |
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