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Sustained Read Transfer Rate
External Drives |
Interface |
Large Files |
Small Files |
Average |
Difference |
1.5 TB Seagate FreeAgent GoFlex |
USB 3.0 |
88.6 MB/s |
52.1 MB/s |
70.4 MB/s |
+ 4.7% |
2 TB WD My Passport |
USB 3.0 |
94.1 MB/s |
45.2 MB/s |
69.7 MB/s |
+ 3.7% |
1 TB WD My Passport Slim |
USB 3.0 |
90.4 MB/s |
44.0 MB/s |
67.2 MB/s |
Baseline |
1 TB WD Elements |
USB 3.0 |
35.4 MB/s |
20.8 MB/s |
28.1 MB/s |
- 58.1% |
1 TB WD My Passport Slim |
USB 2.0 |
33.3 MB/s |
22.3 MB/s |
27.8 MB/s |
- 58.7% |
2 TB WD My Passport |
USB 2.0 |
30.0 MB/s |
20.2 MB/s |
25.1 MB/s |
- 62.6% |
1.5 TB Seagate FreeAgent GoFlex |
USB 2.0 |
25.2 MB/s |
18.5 MB/s |
21.8 MB/s |
- 67.5% |
1 TB WD Elements |
USB 2.0 |
24.6 MB/s |
16.3 MB/s |
20.5 MB/s |
- 69.5% |
The 1 TB Western Digital My Passport Slim is definitely a very fast USB 3.0 hard disk drive. It was particularly fast at large reads, edging out the 1.5 TB Seagate FreeAgent GoFlex and coming close to the 2 TB Western Digital My Passport in performance. Even when used with a slower USB 2.0 port, it was as fast as a "commodity-class" WD Elements hard disk drive running at USB 3.0.
Sustained Write Transfer Rsate
External Drives |
Interface |
Large Files |
Small Files |
Average |
Difference |
1 TB WD My Passport Slim |
USB 3.0 |
64.0 MB/s |
49.8 MB/s |
56.9 MB/s |
Baseline |
2 TB WD My Passport |
USB 3.0 |
63.1 MB/s |
35.4 MB/s |
49.2 MB/s |
- 13.5% |
1.5 TB Seagate FreeAgent GoFlex |
USB 3.0 |
59.1 MB/s |
12.7 MB/s |
35.9 MB/s |
- 36.9% |
1 TB WD My Passport Slim |
USB 2.0 |
25.6 MB/s |
21.7 MB/s |
23.6 MB/s |
- 58.5% |
1 TB WD Elements |
USB 3.0 |
29.2 MB/s |
17.8 MB/s |
23.5 MB/s |
- 58.7% |
2 TB WD My Passport |
USB 2.0 |
23.3 MB/s |
18.6 MB/s |
21.0 MB/s |
- 63.1% |
1 TB WD Elements |
USB 2.0 |
21.4 MB/s |
15.9 MB/s |
18.6 MB/s |
- 67.3% |
1.5 TB Seagate FreeAgent GoFlex |
USB 2.0 |
21.5 MB/s |
11.8 MB/s |
16.7 MB/s |
- 70.7% |
When it came to writes though, the 1 TB Western Digital My Passport Slim was the fastest portable hard disk drive in this comparison, particularly in the Small Files test, where it bested the 2 TB Western Digital My Passport by 40%! This is a big deal because writing 1 TB of small files to the 2 TB My Passport would take 7 hours 51 minutes, but only 5 hours 35 minutes with the 1 TB My Passport Slim!
This test also shows the importance of buying high-speed drives over commoditized drives like the WD Elements. It may be cheap, but filling up the WD Elements with 1 TB of small files would take 15 hours 36 minutes - almost 3x longer than the My Passport Slim! Even when we hobbled the My Passport Slim with a USB 2.0 interface, it was still faster than the WD Elements on USB 3.0.
Maximum Surface Temperature
We monitored the surface temperature of the 4 external drives during their benchmarks. The following chart shows their operating temperature range, from idle to maximum load. Please note that instead of giving you the absolute numbers, we are showing the temperature delta, which is the difference between the actual temperature and the ambient room temperature.
Surprisingly, the 1 TB Western Digital My Passport Slim did not run very hot. We expected it to be hotter because of its slimmer profile and its metal case. However, it looks like the single platter drive that Western Digital used inside does not produce much heat. The drive's metal casing helps too by quickly wicking away the heat from the drive.
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• A Closer Look, Hardware Encryption |
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• IO Meter Random Access Performance |
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