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IO Meter
We compared the Western Digital WD30EURS to the Western Digital WD20EVDS. For more performance comparisons, please take a look at The Hard Disk Drive Performance Comparison Guide.
Throughput (Sequential Access)
Test |
WD30EURS (3 TB) |
WD20EVDS (2 TB) |
Difference |
512 KB Read |
127.49 MB/s |
102.39 MB/s |
+ 24.5% |
512 KB Write |
127.19 MB/s |
102.38 MB/s |
+ 24.2% |
4 KB Read |
56.72 MB/s |
54.65 MB/s |
+ 3.8% |
4 KB Write |
43.59 MB/s |
45.01 MB/s |
- 3.2% |
Thanks to its much higher areal density, the new WD30EURS boasts a much higher sequential transfer rate for large reads and writes. However, that performance advantage was greatly reduced when it came to small reads, and the WD30EURS was actually slightly slower in small writes. For more information on the performance effect of Advance Format Technology, take a look at this article.
Sequential Access Time
Test |
WD30EURS (3 TB) |
WD20EVDS (2 TB) |
Difference |
512 KB Read |
4.11 ms |
5.12 ms |
- 19.7% |
512 KB Write |
4.12 ms |
5.12 ms |
- 19.5% |
4 KB Read |
0.07 ms |
0.07 ms |
- |
4 KB Write |
0.09 ms |
0.09 ms |
- |
CPU Utilization (Sequential Access)
Test |
WD30EURS (3 TB) |
WD20EVDS (2 TB) |
Difference |
512 KB Read |
0.35% |
0.43% |
- 18.6% |
512 KB Write |
0.57% |
0.49% |
+ 16.3% |
4 KB Read |
5.28% |
5.45% |
- 3.1% |
4 KB Write |
4.68% |
5.70% |
- 17.9% |
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• The 3 TB Western Digital AV-GP |
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• Testing The 3 TB Western Digital AV-GP |
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