TEST
YOUR USB

WD (ExtHD)

My Book Duo 25F6 28TB

▲ 500 ▼

Release date ≈ Q3 2020.

Average Bench: 108% (5th of 639)

Based on 68 user benchmarks.  Device: VID 1058 PID 25f6 Model: WD My Book Duo 25F6
Poor: 34%Average: 108% Great: 147%

Outstanding average bench

The WD My Book Duo 25F6 28TB averaged 8.3% higher than the peak scores attained by the group leaders. This is an excellent result which ranks the WD My Book Duo 25F6 28TB near the top of the comparison list.

Strengths

Avg. Sequential Write Speed 273MB/s
Avg. Sustained Write Speed 266MB/s

Terrible consistency

The range of scores (95th - 5th percentile) for the WD My Book Duo 25F6 28TB is 114%. This is a particularly wide range which indicates that the WD My Book Duo 25F6 28TB performs inconsistently under varying real world conditions.

Weaknesses

Avg. 4K Random Read Speed 8.46MB/s
Avg. Sequential Read Speed 278MB/s
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Average Bench

(Based on 68 samples)
Rank 5108%
Min Avg Max
57.7 Read 278 371
33.7 Write 273 361
35.9 Mixed 197 258
38.1 SusWrite 266 386
343% 254 MB/s
Min Avg Max
0.78 4K Read 8.46 10.7
0.7 4K Write 2.55 2.9
0.73 4K Mixed 2.22 2.9
194% 4.41 MB/s
User Benchmarks BenchSequentialRandom 4kDeep queue 4k
The fastest USB (mainstream) averages a speed of 100%
6TB free, PID 25f6
Operating at USB 3.0 Speed
SusWrite @10s intervals: 277 271 273 283 271 269 MB/s
112% Outstanding
Read 284
Write 293
Mixed 164
SusWrite 274
341% 254 MB/s
4K Read 8.3
4K Write 2.9
4K Mixed 2.9
228% 4.7 MB/s
6.5TB free, PID 25f6
Operating at USB 3.0 Speed
SusWrite @10s intervals: 261 272 281 281 272 256 MB/s
107% Outstanding
Read 265
Write 255
Mixed 226
SusWrite 270
346% 254 MB/s
4K Read 9
4K Write 2.6
4K Mixed 2.6
210% 4.73 MB/s
4.5TB free, PID 25f6
Operating at USB 3.0 Speed
SusWrite @10s intervals: 228 230 234 225 231 233 MB/s
94.2% Outstanding
Read 232
Write 188
Mixed 227
SusWrite 230
298% 219 MB/s
4K Read 10.2
4K Write 2.6
4K Mixed 2.6
215% 5.13 MB/s
22.5TB free, PID 25f6
Operating at USB 3.0 Speed
SusWrite @10s intervals: 146 148 139 143 137 139 MB/s
92.1% Outstanding
Read 343
Write 339
Mixed 248
SusWrite 142
350% 268 MB/s
4K Read 10.5
4K Write 2.9
4K Mixed 1.9
202% 5.1 MB/s
13TB free, PID 25f6
Operating at USB 3.0 Speed
SusWrite @10s intervals: 187 206 214 189 171 184 MB/s
72.3% Very good
Read 205
Write 127
Mixed 44.3
SusWrite 192
180% 142 MB/s
4K Read 0.2
4K Write 0.2
4K Mixed 0.1
11% 0.17 MB/s
68 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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