TEST
YOUR USB

WD (ExtHD)

Ext HDD 1021 2.5TB

▲ 500 ▼

Release date ≈ Q4 2014.

Average Bench: 18.1% (243rd of 639)

Based on 317 user benchmarks.  Device: VID 1058 PID 1021 Model: WD Ext HDD 1021
Poor: 12%Average: 18.1% Great: 20%

Terrible average bench

The WD Ext HDD 1021 2.5TB averaged 81.9% 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-64Thread Write Speed 179MB/s
Avg. 4K-64Thread Mixed IO Speed 134MB/s

Excellent consistency

The range of scores (95th - 5th percentile) for the WD Ext HDD 1021 2.5TB is just 8.61%. This is an extremely narrow range which indicates that the WD Ext HDD 1021 2.5TB performs superbly consistently under varying real world conditions.

Weaknesses

Avg. 4K Random Read Speed 0.83MB/s
Avg. Sequential Read Speed 34.2MB/s
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Average Bench

(Based on 317 samples)
Rank 24318.1%
Min Avg Max
26.1 Read 34.2 37.8
19.7 Write 30.3 36.5
20 Mixed 26.6 30.5
10.5 SusWrite 30 38.2
40.7% 30.3 MB/s
Min Avg Max
0.5 4K Read 0.83 0.81
1.2 4K Write 2.07 2.2
0.4 4K Mixed 0.75 0.8
99.1% 1.22 MB/s
Min Avg Max
339 DQ Read 339 339
179 DQ Write 179 179
134 DQ Mixed 134 134
11,914% 218 MB/s
User Benchmarks BenchSequentialRandom 4kDeep queue 4k
The fastest USB (mainstream) averages a speed of 100%
2TB free, PID 1021
Operating at USB 2.0 Speed
SusWrite @10s intervals: 34 37 37 36 36 36 MB/s
18.8% Very poor
Read 52
Write 31.2
Mixed 26.7
SusWrite 36
46% 36.5 MB/s
4K Read 1.4
4K Write 1
4K Mixed 0.7
63% 1.03 MB/s
802GB free, PID 1021
Operating at USB 2.0 Speed
SusWrite @10s intervals: 33 33 33 34 33 34 MB/s
18.5% Very poor
Read 55
Write 31.3
Mixed 28
SusWrite 33.1
46% 36.8 MB/s
4K Read 2.3
4K Write 0.9
4K Mixed 0.6
60% 1.27 MB/s
486GB free, PID 1021
Operating at USB 2.0 Speed
SusWrite @10s intervals: 34 35 35 34 34 34 MB/s
18.1% Very poor
Read 53.5
Write 30.1
Mixed 26.4
SusWrite 34.1
45% 36 MB/s
4K Read 2.1
4K Write 0.8
4K Mixed 0.7
59% 1.2 MB/s
2TB free, PID 1021
Operating at USB 2.0 Speed
SusWrite @10s intervals: 36 36 36 36 37 36 MB/s
18.1% Very poor
Read 36.2
Write 36.6
Mixed 29.9
SusWrite 36.1
47% 34.7 MB/s
4K Read 1.4
4K Write 1.5
4K Mixed 0.7
80% 1.2 MB/s
1.5TB free, PID 1021
Operating at USB 2.0 Speed
SusWrite @10s intervals: 31 31 32 33 31 32 MB/s
17.8% Very poor
Read 52.6
Write 31.1
Mixed 27.7
SusWrite 31.7
45% 35.8 MB/s
4K Read 2.1
4K Write 0.9
4K Mixed 0.8
66% 1.27 MB/s
802GB free, PID 1021
Operating at USB 2.0 Speed
SusWrite @10s intervals: 33 35 37 37 36 37 MB/s
17.8% Very poor
Read 36.2
Write 37
Mixed 28.3
SusWrite 35.9
47% 34.3 MB/s
4K Read 1.6
4K Write 1.4
4K Mixed 0.7
77% 1.23 MB/s
802GB free, PID 1021
Operating at USB 2.0 Speed
SusWrite @10s intervals: 31 30 30 31 31 31 MB/s
17.7% Very poor
Read 53.4
Write 31.3
Mixed 26.8
SusWrite 30.6
44% 35.5 MB/s
4K Read 2
4K Write 0.9
4K Mixed 0.7
62% 1.2 MB/s
487GB free, PID 1021
Operating at USB 2.0 Speed
SusWrite @10s intervals: 32 35 35 35 35 34 MB/s
17.4% Very poor
Read 51.5
Write 34.4
Mixed 28.6
SusWrite 34.3
48% 37.2 MB/s
4K Read 1.4
4K Write 0.7
4K Mixed 0.6
49% 0.9 MB/s
317 MORE »
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