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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 4 TB Western Digital Red (WD40EFRX) to the 3 TB Western Digital Red (WD30EFRX). For more performance comparisons, please take a look at The Hard Disk Drive Performance Comparison Guide.
4 KB Sequential Read
Outstanding I/Os |
WD Red (4 TB) |
WD Red (3 TB) |
Difference |
1 |
12,550 IOPS |
13,201 IOPS |
- 4.9% |
8 |
22,904 IOPS |
36,832 IOPS |
- 37.8% |
32 |
34,788 IOPS |
36,916 IOPS |
- 5.8% |
Surprisingly, when it came to sequential reads, the 4 TB Red's performance at 8 simultaneous I/Os was far poorer than the 3 TB Red's performance, even though they more or less equalized at 32 simultaneous I/Os.
4 KB Sequential Write
Outstanding I/Os |
WD Red (4 TB) |
WD Red (3 TB) |
Difference |
1 |
9,802 IOPS |
11,035 IOPS |
- 11.2% |
8 |
27,086 IOPS |
29,140 IOPS |
- 7.0% |
32 |
27,093 IOPS |
29,294 IOPS |
- 7.5% |
When it came to sequential writes though, the 4 TB Red managed to keep up with the 3 TB Red.
512 KB Sequential Read
Outstanding I/Os |
WD Red (4 TB) |
WD Red (3 TB) |
Difference |
1 |
278 IOPS |
293 IOPS |
- 5.2% |
8 |
278 IOPS |
293 IOPS |
- 5.2% |
32 |
277 IOPS |
293 IOPS |
- 5.4% |
512 KB Sequential Write
Outstanding I/Os |
WD Red (4 TB) |
WD Red (3 TB) |
Difference |
1 |
277 IOPS |
292 IOPS |
- 5.1% |
8 |
278 IOPS |
293 IOPS |
- 5.1% |
32 |
277 IOPS |
292 IOPS |
- 5.1% |
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• Testing The 4 TB Western Digital Red |
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• Transfer Rate Range, Platter Profile |
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