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Jmicron (ExtHD)

Corp. 250GB

▲ 500 ▼

Release date ≈ Q1 2015.

Average Bench: 26.5% (135th of 639)

Based on 39 user benchmarks.  Device: VID 152d PID 2509 Model: Jmicron Corp.
Poor: 9%Average: 26.5% Great: 73%

Very poor average bench

The Jmicron Corp. 250GB averaged 73.5% 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-64Thread Write Speed 20.7MB/s
Avg. 4K-64Thread Mixed IO Speed 13.7MB/s

Poor consistency

The range of scores (95th - 5th percentile) for the Jmicron Corp. 250GB is 63.8%. This is a particularly wide range which indicates that the Jmicron Corp. 250GB performs inconsistently under varying real world conditions.

Weaknesses

Avg. 4K Random Read Speed 2.05MB/s
Avg. Sequential Read Speed 41.5MB/s

Average Bench

(Based on 39 samples)
Rank 13526.5%
Min Avg Max
7.64 Read 41.5 233
10.8 Write 39.5 218
7.61 Mixed 29.7 200
4.7 SusWrite 41.8 219
51.5% 38.1 MB/s
Min Avg Max
0.16 4K Read 2.05 14.7
0.5 4K Write 3.73 24.9
0.15 4K Mixed 2.28 17
212% 2.69 MB/s
Min Avg Max
11 DQ Read 13.7 17.7
13.8 DQ Write 20.7 36.2
8.7 DQ Mixed 13.7 21.4
1,220% 16 MB/s
User Benchmarks BenchSequentialRandom 4kDeep queue 4k
The fastest USB (mainstream) averages a speed of 100%
13GB free, PID 2509
Operating at USB 2.0 Speed
SusWrite @10s intervals: 38 31 35 40 37 38 MB/s
59.4% Above average
Read 32.6
Write 39
Mixed 38.6
SusWrite 36.4
51% 36.7 MB/s
4K Read 8.1
4K Write 14.6
4K Mixed 11.4
914% 11.4 MB/s
DQ Read 12.3
DQ Write 18.6
DQ Mixed 14.2
1,161% 15 MB/s
48GB free, PID 2509
Operating at USB 2.0 Speed
SusWrite @10s intervals: 39 38 38 38 38 37 MB/s
18% Very poor
Read 51
Write 34.8
Mixed 25.5
SusWrite 37.9
48% 37.3 MB/s
4K Read 0.8
4K Write 0.7
4K Mixed 0.7
51% 0.73 MB/s
107GB free, PID 2509
Operating at USB 2.1 Speed
SusWrite @10s intervals: 41 40 40 40 40 40 MB/s
16.6% Very poor
Read 38.5
Write 39.1
Mixed 24.8
SusWrite 40
48% 35.6 MB/s
4K Read 0.7
4K Write 0.7
4K Mixed 0.6
47% 0.67 MB/s
79GB free, PID 2509
Operating at USB 2.0 Speed
SusWrite @10s intervals: 32 34 33 31 30 30 MB/s
16% Very poor
Read 34.5
Write 33.4
Mixed 24.9
SusWrite 31.4
42% 31.1 MB/s
4K Read 0.5
4K Write 1.3
4K Mixed 0.4
60% 0.73 MB/s
31GB free, PID 2509
Operating at USB 2.0 Speed
SusWrite @10s intervals: 17 17 17 17 17 17 MB/s
12% Very poor
Read 32.8
Write 15.4
Mixed 17.5
SusWrite 17.1
26% 20.7 MB/s
4K Read 0.4
4K Write 1.1
4K Mixed 0.4
52% 0.63 MB/s
39 MORE »
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