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WD (ExtHD)

My Book 25DA 8TB

▲ 500 ▼

Release date ≈ Q2 2016.

Average Bench: 48.7% (24th of 639)

Based on 718 user benchmarks.  Device: VID 1058 PID 25da Model: WD My Book 25DA
Poor: 15%Average: 48.7% Great: 67%

Below average average bench

The WD My Book 25DA 8TB averaged 51.3% 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 1.95MB/s
Avg. Sequential Write Speed 123MB/s

Below average consistency

The range of scores (95th - 5th percentile) for the WD My Book 25DA 8TB is 52.4%. This is a relatively wide range which indicates that the WD My Book 25DA 8TB performs inconsistently under varying real world conditions.

Weaknesses

Avg. 4K Random Read Speed 0.96MB/s
Avg. Sequential Read Speed 119MB/s

Average Bench

(Based on 718 samples)
Rank 2448.7%
Min Avg Max
32.2 Read 119 170
29.4 Write 123 174
25.7 Mixed 67.1 96.7
18.4 SusWrite 115 170
142% 106 MB/s
Min Avg Max
0.69 4K Read 0.96 1.1
1.42 4K Write 1.95 2.4
0.44 4K Mixed 1.09 1.4
107% 1.33 MB/s
User Benchmarks BenchSequentialRandom 4kDeep queue 4k
The fastest USB (mainstream) averages a speed of 100%
3TB free, PID 25da
Operating at USB 3.0 Speed
SusWrite @10s intervals: 164 158 157 159 158 167 MB/s
63.6% Good
Read 155
Write 160
Mixed 82.9
SusWrite 161
188% 140 MB/s
4K Read 0.9
4K Write 1.9
4K Mixed 1.3
112% 1.37 MB/s
2TB free, PID 25da
Operating at USB 3.0 Speed
SusWrite @10s intervals: 120 126 114 115 118 115 MB/s
57% Above average
Read 163
Write 169
Mixed 75.1
SusWrite 118
173% 131 MB/s
4K Read 0.9
4K Write 2.4
4K Mixed 1.2
126% 1.5 MB/s
3.5TB free, PID 25da
Operating at USB 3.0 Speed
SusWrite @10s intervals: 125 149 125 138 142 141 MB/s
56.7% Above average
Read 142
Write 144
Mixed 72.2
SusWrite 136
165% 124 MB/s
4K Read 1.1
4K Write 2
4K Mixed 1.4
120% 1.5 MB/s
965GB free, PID 25da
Operating at USB 3.0 Speed
SusWrite @10s intervals: 135 132 128 138 138 134 MB/s
48.8% Average
Read 93.2
Write 91.7
Mixed 59.5
SusWrite 134
130% 94.6 MB/s
4K Read 1.1
4K Write 1.9
4K Mixed 1.2
110% 1.4 MB/s
5TB free, PID 25da
Operating at USB 3.0 Speed
SusWrite @10s intervals: 104 111 104 111 113 111 MB/s
45.9% Average
Read 109
Write 110
Mixed 65.9
SusWrite 109
132% 98.3 MB/s
4K Read 1
4K Write 2
4K Mixed 1.3
116% 1.43 MB/s
2TB free, PID 25da
Operating at USB 2.1 Speed
SusWrite @10s intervals: 28 23 22 16 24 27 MB/s
12.4% Very poor
Read 50.2
Write 36
Mixed 14.7
SusWrite 23.5
38% 31.1 MB/s
4K Read 0.2
4K Write 0
4K Mixed 0.1
4% 0.1 MB/s
718 MORE »
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