TEST
YOUR USB

ZALMAN (ExtHD)

External HDD 640GB

▲ 500 ▼

Release date ≈ Q4 2014.

Average Bench: 23.6% (180th of 639)

Based on 27 user benchmarks.  Device: VID 04c5 PID 2028 Model: ZALMAN External HDD
Poor: 11%Average: 23.6% Great: 32%

Very poor average bench

The ZALMAN External HDD 640GB averaged 76.3% 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 1.26MB/s
Avg. Sequential Write Speed 54MB/s

Good consistency

The range of scores (95th - 5th percentile) for the ZALMAN External HDD 640GB is 21%. This is a relatively narrow range which indicates that the ZALMAN External HDD 640GB performs reasonably consistently under varying real world conditions.

Weaknesses

Avg. 4K Random Read Speed 0.43MB/s
Avg. Sequential Read Speed 56.2MB/s
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Average Bench

(Based on 27 samples)
Rank 18023.6%
Min Avg Max
2.88 Read 56.2 92.3
21.2 Write 54 89
7.61 Mixed 33.7 72.9
22.9 SusWrite 49.5 81
64.5% 48.3 MB/s
Min Avg Max
0.13 4K Read 0.43 0.52
0.14 4K Write 1.26 1.9
0.09 4K Mixed 0.37 0.7
57.2% 0.69 MB/s
User Benchmarks BenchSequentialRandom 4kDeep queue 4k
The fastest USB (mainstream) averages a speed of 100%
82GB free, PID 2028
Operating at USB 3.0 Speed
SusWrite @10s intervals: 79 80 81 82 82 82 MB/s
37% Below average
Read 92.3
Write 89
Mixed 43.9
SusWrite 81
101% 76.6 MB/s
4K Read 0.5
4K Write 1.9
4K Mixed 0.6
87% 1 MB/s
258GB free, PID 2028
SusWrite @10s intervals: 70 69 69 69 69 70 MB/s
30.5% Below average
Read 79.9
Write 78.6
Mixed 44.6
SusWrite 69.3
91% 68.1 MB/s
4K Read 0.5
4K Write 1.2
4K Mixed 0.6
63% 0.77 MB/s
152GB free, PID 2028
Operating at USB 3.0 Speed
SusWrite @10s intervals: 55 60 58 60 61 60 MB/s
26.5% Poor
Read 57.5
Write 55.7
Mixed 35.7
SusWrite 59
70% 52 MB/s
4K Read 0.5
4K Write 1.7
4K Mixed 0.6
80% 0.93 MB/s
78GB free, PID 2028
Operating at USB 3.0 Speed
SusWrite @10s intervals: 59 57 58 57 58 57 MB/s
25.7% Poor
Read 53.5
Write 56.7
Mixed 34.3
SusWrite 57.7
69% 50.5 MB/s
4K Read 0.5
4K Write 1.7
4K Mixed 0.7
84% 0.97 MB/s
22GB free, PID 2028
Operating at USB 3.0 Speed
SusWrite @10s intervals: 48 48 48 49 48 49 MB/s
22.1% Poor
Read 56.2
Write 49.5
Mixed 33.7
SusWrite 48.1
62% 46.9 MB/s
4K Read 0.5
4K Write 1.1
4K Mixed 0.7
63% 0.77 MB/s
173GB free, PID 2028
Operating at USB 2.1 Speed
SusWrite @10s intervals: 21 21 21 24 25 26 MB/s
13.4% Very poor
Read 30
Write 23.5
Mixed 27
SusWrite 22.9
34% 25.9 MB/s
4K Read 0.4
4K Write 1.3
4K Mixed 0.7
70% 0.8 MB/s
134GB free, PID 2028
Operating at USB 2.1 Speed
SusWrite @10s intervals: 20 21 25 25 25 26 MB/s
10.7% Very poor
Read 31.2
Write 22.8
Mixed 17.3
SusWrite 23.7
31% 23.8 MB/s
4K Read 0.5
4K Write 0.3
4K Mixed 0.3
22% 0.37 MB/s
27 MORE »
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