TEST
YOUR USB

WD (ExtHD)

My Book 25DB 8TB

▲ 500 ▼

Release date ≈ Q4 2016.

Average Bench: 40.2% (41st of 639)

Based on 14 user benchmarks.  Device: VID 1058 PID 25db Model: WD My Book 25DB
Poor: 12%Average: 40.2% Great: 62%

Below average average bench

The WD My Book 25DB 8TB averaged 59.8% lower than the peak scores attained by the group leaders. This isn't a great result which indicates that there are much faster alternatives on the comparison list.

Strengths

Avg. 4K Random Write Speed 1.62MB/s
Avg. Sustained Write Speed 99.3MB/s

Average consistency

The range of scores (95th - 5th percentile) for the WD My Book 25DB 8TB is 49.6%. This is a relatively wide range which indicates that the WD My Book 25DB 8TB performs inconsistently under varying real world conditions.

Weaknesses

Avg. 4K Random Read Speed 0.86MB/s
Avg. Sequential Read Speed 95.8MB/s
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Average Bench

(Based on 14 samples)
Rank 4140.2%
Min Avg Max
30.6 Read 95.8 169
25 Write 98.2 168
23.7 Mixed 66.2 123
11.9 SusWrite 99.3 172
122% 89.9 MB/s
Min Avg Max
0.2 4K Read 0.86 1.1
0.6 4K Write 1.62 2.29
0.2 4K Mixed 0.82 1.4
86.4% 1.1 MB/s
User Benchmarks BenchSequentialRandom 4kDeep queue 4k
The fastest USB (mainstream) averages a speed of 100%
6TB free, PID 25db
Operating at USB 3.0 Speed
SusWrite @10s intervals: 163 173 180 174 175 168 MB/s
68.8% Good
Read 169
Write 168
Mixed 86
SusWrite 172
200% 149 MB/s
4K Read 1.1
4K Write 2.1
4K Mixed 1.2
116% 1.47 MB/s
4.5TB free, PID 25db
Operating at USB 3.0 Speed
SusWrite @10s intervals: 153 144 150 156 162 156 MB/s
61.6% Good
Read 150
Write 151
Mixed 82.3
SusWrite 154
180% 134 MB/s
4K Read 1
4K Write 2
4K Mixed 1.3
116% 1.43 MB/s
2TB free, PID 25db
Operating at USB 3.0 Speed
SusWrite @10s intervals: 110 111 108 106 104 112 MB/s
45.3% Average
Read 108
Write 107
Mixed 69.5
SusWrite 108
132% 98.2 MB/s
4K Read 1.1
4K Write 1.9
4K Mixed 1.4
116% 1.47 MB/s
2TB free, PID 25db
Operating at USB 3.0 Speed
SusWrite @10s intervals: 109 111 108 106 104 113 MB/s
45.2% Average
Read 107
Write 105
Mixed 68
SusWrite 109
131% 97 MB/s
4K Read 1.1
4K Write 1.9
4K Mixed 1.3
113% 1.43 MB/s
326GB free, PID 25db
Operating at USB 3.0 Speed
SusWrite @10s intervals: 87 85 84 84 81 88 MB/s
35.9% Below average
Read 75.7
Write 82.4
Mixed 54
SusWrite 85
102% 74.3 MB/s
4K Read 0.9
4K Write 2
4K Mixed 1
105% 1.3 MB/s
3.5TB free, PID 25db
Operating at USB 2.1 Speed
SusWrite @10s intervals: 22 20 21 21 21 21 MB/s
16.6% Very poor
Read 36.7
Write 41
Mixed 31
SusWrite 21.1
44% 32.5 MB/s
4K Read 0.8
4K Write 2.1
4K Mixed 1
108% 1.3 MB/s
770GB free, PID 25db
Operating at USB 3.0 Speed
SusWrite @10s intervals: 10 11 10 10 14 16 MB/s
9.69% Terrible
Read 35.9
Write 26.3
Mixed 23.7
SusWrite 11.9
31% 24.5 MB/s
4K Read 0.2
4K Write 0.6
4K Mixed 0.2
28% 0.33 MB/s
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