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IOPS Scaling (Sequential)
In these tests, we tested the drive's ability to tackle multiple input/output operations. Again, we compared the 6 TB Western Digital Red (WD60EFRX) to the 4 TB Western Digital Red (WD40EFRX). For more performance comparisons, please take a look at The Hard Disk Drive Performance Comparison Guide.
When it comes to small sequential accesses, both drives performed similarly with single I/Os. But when multiple transactions started queuing up, the 6 TB drive did much better. This shows that the Marvell 88i1047 processor used in the 6 TB drive is likely to be much faster than the Marvell 88i9446 processor used in the 4 TB drive.
4 KB Sequential Read
Outstanding I/Os |
WD Red (6 TB) |
WD Red (4 TB) |
Difference |
1 |
12,608 IOPS |
12,550 IOPS |
+ 0.5% |
8 |
37,207 IOPS |
22,904 IOPS |
+ 62.4% |
32 |
36,793 IOPS |
34,788 IOPS |
+ 5.8% |
4 KB Sequential Write
Outstanding I/Os |
WD Red (6 TB) |
WD Red (4 TB) |
Difference |
1 |
12,228 IOPS |
9,802 IOPS |
+ 24.8% |
8 |
38,668 IOPS |
27,086 IOPS |
+ 42.8% |
32 |
38,560 IOPS |
27,093 IOPS |
+ 42.3% |
512 KB Sequential Read
Outstanding I/Os |
WD Red (6 TB) |
WD Red (4 TB) |
Difference |
1 |
329 IOPS |
278 IOPS |
+ 18.6% |
8 |
329 IOPS |
278 IOPS |
+ 18.6% |
32 |
329 IOPS |
277 IOPS |
+ 18.9% |
512 KB Sequential Write
Outstanding I/Os |
WD Red (6 TB) |
WD Red (4 TB) |
Difference |
1 |
330 IOPS |
277 IOPS |
+ 19.0% |
8 |
331 IOPS |
278 IOPS |
+ 19.1% |
32 |
330 IOPS |
277 IOPS |
+ 19.0% |
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6 TB Western Digital Red Review |
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• WD Red Hardware Enhancements |
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• Testing The 6 TB Western Digital Red |
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6 |
• Transfer Rate Range, Platter Profile |
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