TEST
YOUR USB

JMicron (ExtHD)

H/W RAID1 4TB

▲ 500 ▼

Release date ≈ Q2 2015.

Average Bench: 41.6% (37th of 639)

Based on 7 user benchmarks.  Device: VID 152d PID 0551 Model: JMicron H/W RAID1
Poor: 19%Average: 41.6% Great: 66%

Below average average bench

The JMicron H/W RAID1 4TB averaged 58.4% 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 1.81MB/s
Avg. Sequential Write Speed 99.5MB/s

Average consistency

The range of scores (95th - 5th percentile) for the JMicron H/W RAID1 4TB is 46.4%. This is a relatively wide range which indicates that the JMicron H/W RAID1 4TB performs inconsistently under varying real world conditions.

Weaknesses

Avg. 4K Random Read Speed 0.84MB/s
Avg. Sequential Read Speed 98.2MB/s
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Average Bench

(Based on 7 samples)
Rank 3741.6%
Min Avg Max
35 Read 98.2 180
35 Write 99.5 155
27.4 Mixed 52 85.2
37.1 SusWrite 98 128
117% 86.9 MB/s
Min Avg Max
0.47 4K Read 0.84 1
1.37 4K Write 1.81 2
0.26 4K Mixed 0.79 1.1
91.5% 1.15 MB/s
User Benchmarks BenchSequentialRandom 4kDeep queue 4k
The fastest USB (mainstream) averages a speed of 100%
3.5TB free, PID 0551
Operating at USB 3.0 Speed
65.6% Good
Read 180
Write 155
Mixed 27.4
137% 121 MB/s
4K Read 0.73
4K Write 1.81
4K Mixed 0.26
73% 0.93 MB/s
424GB free, PID 0551
Operating at USB 3.0 Speed
SusWrite @10s intervals: 126 130 130 125 130 130 MB/s
54.3% Above average
Read 137
Write 138
Mixed 85.2
SusWrite 128
164% 122 MB/s
4K Read 1
4K Write 2
4K Mixed 1.1
109% 1.37 MB/s
1TB free, PID 0551
Operating at USB 3.0 Speed
SusWrite @10s intervals: 122 117 120 121 118 113 MB/s
48.1% Average
Read 110
Write 116
Mixed 62.5
SusWrite 118
138% 102 MB/s
4K Read 0.8
4K Write 2
4K Mixed 1
105% 1.27 MB/s
596GB free, PID 0551
Operating at USB 3.0 Speed
SusWrite @10s intervals: 99 105 105 105 105 105 MB/s
43.1% Average
Read 99.3
Write 104
Mixed 58.7
SusWrite 104
124% 91.4 MB/s
4K Read 1
4K Write 1.9
4K Mixed 0.9
99% 1.27 MB/s
596GB free, PID 0551
Operating at USB 3.0 Speed
SusWrite @10s intervals: 99 102 104 103 104 102 MB/s
40.9% Average
Read 88.8
Write 101
Mixed 61.6
SusWrite 102
121% 88.5 MB/s
4K Read 1
4K Write 1.8
4K Mixed 1
99% 1.27 MB/s
2.5TB free, PID 0551
Operating at USB 2.0 Speed
SusWrite @10s intervals: 36 36 37 38 38 38 MB/s
19.1% Very poor
Read 36.6
Write 35
Mixed 31.9
SusWrite 37.1
48% 35.2 MB/s
4K Read 0.9
4K Write 1.8
4K Mixed 1
99% 1.23 MB/s
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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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