TEST
YOUR USB

WD (ExtHD)

My Book Duo 25F6 16TB

▲ 500 ▼

Release date ≈ Q4 2017.

Average Bench: 86% (5th of 639)

Based on 270 user benchmarks.  Device: VID 1058 PID 25f6 Model: WD My Book Duo 25F6
Poor: 16%Average: 86% Great: 136%

Very good average bench

The WD My Book Duo 25F6 16TB averaged just 14.0% lower than the peak scores attained by the group leaders. This is an excellent result which ranks the WD My Book Duo 25F6 16TB near the top of the comparison list.

Strengths

Avg. Sustained Write Speed 199MB/s
Avg. Sequential Write Speed 190MB/s

Terrible consistency

The range of scores (95th - 5th percentile) for the WD My Book Duo 25F6 16TB is 120%. This is a particularly wide range which indicates that the WD My Book Duo 25F6 16TB performs inconsistently under varying real world conditions.

Weaknesses

Avg. 4K Random Mixed IO Speed 0.85MB/s
Avg. 4K Random Read Speed 7.89MB/s
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Average Bench

(Based on 270 samples)
Rank 586%
Min Avg Max
33.7 Read 222 336
5.35 Write 190 327
16 Mixed 112 218
4.35 SusWrite 199 355
238% 181 MB/s
Min Avg Max
1.2 4K Read 7.89 21.6
0.6 4K Write 2.83 5
0.5 4K Mixed 0.85 1.7
155% 3.86 MB/s
User Benchmarks BenchSequentialRandom 4kDeep queue 4k
The fastest USB (mainstream) averages a speed of 100%
10TB free, PID 25f6
Operating at USB 3.0 Speed
SusWrite @10s intervals: 340 359 351 347 345 347 MB/s
141% Outstanding
Read 314
Write 300
Mixed 218
SusWrite 348
400% 295 MB/s
4K Read 18.2
4K Write 5
4K Mixed 1.6
292% 8.27 MB/s
10TB free, PID 25f6
Operating at USB 3.0 Speed
SusWrite @10s intervals: 341 344 354 355 360 380 MB/s
114% Outstanding
Read 224
Write 199
Mixed 57.2
SusWrite 356
283% 209 MB/s
4K Read 6.1
4K Write 0.7
4K Mixed 0.4
60% 2.4 MB/s
3TB free, PID 25f6
SusWrite @10s intervals: 257 263 265 248 262 263 MB/s
98.5% Outstanding
Read 239
Write 242
Mixed 129
SusWrite 260
293% 217 MB/s
4K Read 21.5
4K Write 0.7
4K Mixed 0.4
117% 7.53 MB/s
3.5TB free, PID 25f6
SusWrite @10s intervals: 222 228 229 230 224 232 MB/s
83.6% Excellent
Read 210
Write 165
Mixed 54.9
SusWrite 228
214% 164 MB/s
4K Read 7.4
4K Write 0.6
4K Mixed 0.4
61% 2.8 MB/s
3TB free, PID 25f6
SusWrite @10s intervals: 141 153 150 142 142 142 MB/s
58.8% Above average
Read 167
Write 149
Mixed 83.5
SusWrite 145
179% 136 MB/s
4K Read 6
4K Write 0.5
4K Mixed 0.5
56% 2.33 MB/s
270 MORE »
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  • Best user rated - User sentiment trumps benchmarks for this comparison.
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  • Fastest real world speed - Real World Speed measures performance for typical consumers.

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