TEST
YOUR USB

WD (ExtHD)

WD-AV SCSA 25B8 1TB

▲ 500 ▼

Release date ≈ Q4 2015.

Average Bench: 35.7% (57th of 639)

Based on 93 user benchmarks.  Device: VID 1058 PID 25b8 Model: WD WD-AV SCSA 25B8
Poor: 17%Average: 35.7% Great: 47%

Poor average bench

The WD WD-AV SCSA 25B8 1TB averaged 64.3% 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 1.87MB/s
Avg. Sequential Write Speed 86.2MB/s

Above average consistency

The range of scores (95th - 5th percentile) for the WD WD-AV SCSA 25B8 1TB is 30.3%. This is a relatively narrow range which indicates that the WD WD-AV SCSA 25B8 1TB performs reasonably consistently under varying real world conditions.

Weaknesses

Avg. 4K Random Read Speed 0.51MB/s
Avg. Sequential Read Speed 86.3MB/s
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Average Bench

(Based on 93 samples)
Rank 5735.7%
Min Avg Max
31.7 Read 86.3 114
26.2 Write 86.2 116
22.4 Mixed 48.2 71.9
17.9 SusWrite 80.6 115
101% 75.3 MB/s
Min Avg Max
0.33 4K Read 0.51 0.6
1.03 4K Write 1.87 2.2
0.18 4K Mixed 0.71 0.9
89.9% 1.03 MB/s
User Benchmarks BenchSequentialRandom 4kDeep queue 4k
The fastest USB (mainstream) averages a speed of 100%
15GB free, PID 25b8
Operating at USB 3.0 Speed
SusWrite @10s intervals: 96 99 98 98 97 82 MB/s
40.3% Average
Read 92.2
Write 101
Mixed 50.3
SusWrite 95
114% 84.6 MB/s
4K Read 0.5
4K Write 2
4K Mixed 0.8
97% 1.1 MB/s
527GB free, PID 25b8
Operating at USB 3.0 Speed
SusWrite @10s intervals: 99 102 102 102 102 102 MB/s
35.5% Below average
Read 55.1
Write 59
Mixed 37.4
SusWrite 102
89% 63.2 MB/s
4K Read 0.5
4K Write 1.7
4K Mixed 0.7
84% 0.97 MB/s
115GB free, PID 25b8
Operating at USB 3.0 Speed
SusWrite @10s intervals: 62 64 62 62 63 63 MB/s
34% Below average
Read 97.2
Write 102
Mixed 51.7
SusWrite 62.6
103% 78.3 MB/s
4K Read 0.5
4K Write 2
4K Mixed 0.9
100% 1.13 MB/s
164GB free, PID 25b8
Operating at USB 3.0 Speed
SusWrite @10s intervals: 63 64 63 62 63 62 MB/s
33.3% Below average
Read 101
Write 105
Mixed 51.9
SusWrite 62.7
105% 80.1 MB/s
4K Read 0.6
4K Write 1.6
4K Mixed 0.9
87% 1.03 MB/s
26GB free, PID 25b8
Operating at USB 3.0 Speed
SusWrite @10s intervals: 60 62 61 61 61 61 MB/s
30.2% Below average
Read 71.3
Write 72.9
Mixed 43.4
SusWrite 61.1
83% 62.2 MB/s
4K Read 0.5
4K Write 2.1
4K Mixed 0.9
104% 1.17 MB/s
868GB free, PID 25b8
Operating at USB 2.1 Speed
SusWrite @10s intervals: 39 39 37 40 40 41 MB/s
20.7% Poor
Read 56.2
Write 28
Mixed 29.8
SusWrite 39.4
48% 38.3 MB/s
4K Read 1
4K Write 1.2
4K Mixed 0.9
75% 1.03 MB/s
93 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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