TEST
YOUR USB

(ExtHD)

JMicron 4TB

▲ 500 ▼

Release date ≈ Q4 2016.

Average Bench: 40.1% (41st of 639)

Based on 11 user benchmarks.  Device: VID 152d PID 2561 Model: JMicron
Poor: 13%Average: 40.1% Great: 62%

Below average average bench

The JMicron 4TB averaged 59.9% 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 2.47MB/s
Avg. Sustained Write Speed 94.2MB/s

Average consistency

The range of scores (95th - 5th percentile) for the JMicron 4TB is 48.3%. This is a relatively wide range which indicates that the JMicron 4TB performs inconsistently under varying real world conditions.

Weaknesses

Avg. 4K Random Read Speed 2.51MB/s
Avg. 4K Random Mixed IO Speed 0.54MB/s
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Average Bench

(Based on 11 samples)
Rank 4140.1%
Min Avg Max
1 Read 90.8 179
1 Write 87.3 179
1 Mixed 63.5 123
0.1 SusWrite 94.2 155
114% 83.9 MB/s
Min Avg Max
0.37 4K Read 2.51 14.1
0.9 4K Write 2.47 5.2
0.2 4K Mixed 0.54 1
111% 1.84 MB/s
User Benchmarks BenchSequentialRandom 4kDeep queue 4k
The fastest USB (mainstream) averages a speed of 100%
1.5TB free, PID 2561
Operating at USB 3.0 Speed
SusWrite @10s intervals: 150 155 158 156 155 157 MB/s
61.7% Good
Read 78.2
Write 85.5
Mixed 81.5
SusWrite 155
142% 100 MB/s
4K Read 2.3
4K Write 5.2
4K Mixed 0.5
202% 2.67 MB/s
2.5TB free, PID 2561
Operating at USB 3.0 Speed
SusWrite @10s intervals: 131 133 133 132 132 132 MB/s
55.3% Above average
Read 128
Write 133
Mixed 81.7
SusWrite 132
161% 119 MB/s
4K Read 0.9
4K Write 2.5
4K Mixed 1
122% 1.47 MB/s
600GB free, PID 2561
Operating at USB 3.0 Speed
SusWrite @10s intervals: 62 90 94 94 92 90 MB/s
54.8% Above average
Read 145
Write 150
Mixed 123
SusWrite 86.9
169% 126 MB/s
4K Read 5.6
4K Write 4.4
4K Mixed 0.7
194% 3.57 MB/s
613GB free, PID 2561
Operating at USB 3.0 Speed
50.8% Above average
Read 148
Write 102
Mixed 105
143% 118 MB/s
4K Read 0.93
4K Write 2.25
4K Mixed 0.21
87% 1.13 MB/s
1TB free, PID 2561
Operating at USB 3.0 Speed
SusWrite @10s intervals: 104 99 103 100 99 102 MB/s
47.8% Average
Read 123
Write 119
Mixed 64
SusWrite 101
135% 102 MB/s
4K Read 0.7
4K Write 2.5
4K Mixed 1
122% 1.4 MB/s
62GB free, PID 2561
Operating at USB 3.0 Speed
SusWrite @10s intervals: 90 90 91 91 84 90 MB/s
39.6% Below average
Read 75.7
Write 89.3
Mixed 56.9
SusWrite 89.3
107% 77.8 MB/s
4K Read 1.1
4K Write 2.9
4K Mixed 0.9
133% 1.63 MB/s
1.5TB free, PID 2561
Operating at USB 3.0 Speed
25% Poor
Read 71.5
Write 54.1
Mixed 47.7
70% 57.8 MB/s
4K Read 0.42
4K Write 0.9
4K Mixed 0.22
40% 0.51 MB/s
3.5TB free, PID 2561
Operating at USB 2.1 Speed
SusWrite @10s intervals: 0.2 0.2 0.1 0.1 0.2 MB/s
3.38% Terrible
Read 1
Write 1
Mixed 1
SusWrite 0.1
1% 0.77 MB/s
4K Read 0.6
4K Write 1
4K Mixed 0.7
60% 0.77 MB/s
11 MORE »
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