TEST
YOUR USB

Seagate (ExtHD)

Backup+ SL 1.5TB

▲ 500 ▼

Release date ≈ Q3 2014.

Average Bench: 34.1% (63rd of 639)

Based on 14 user benchmarks.  Device: VID 0bc2 PID ab20 Model: Seagate Backup+ SL
Poor: 16%Average: 34.1% Great: 44%

Poor average bench

The Seagate Backup+ SL 1.5TB averaged 65.9% 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 1.55MB/s
Avg. Sustained Write Speed 85.5MB/s

Good consistency

The range of scores (95th - 5th percentile) for the Seagate Backup+ SL 1.5TB is 28.6%. This is a relatively narrow range which indicates that the Seagate Backup+ SL 1.5TB performs reasonably consistently under varying real world conditions.

Weaknesses

Avg. 4K Random Read Speed 0.49MB/s
Avg. 4K Random Mixed IO Speed 0.41MB/s
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Average Bench

(Based on 14 samples)
Rank 6334.1%
Min Avg Max
27.8 Read 75.9 99.8
19.1 Write 82 121
21.8 Mixed 56.9 80.5
75.8 SusWrite 85.5 99.2
103% 75.1 MB/s
Min Avg Max
0.25 4K Read 0.49 0.63
0.57 4K Write 1.55 2.07
0.22 4K Mixed 0.41 0.8
68.5% 0.82 MB/s
User Benchmarks BenchSequentialRandom 4kDeep queue 4k
The fastest USB (mainstream) averages a speed of 100%
20GB free, PID ab20
Operating at USB 3.0 Speed
SusWrite @10s intervals: 103 98 97 96 100 102 MB/s
41% Average
Read 92.5
Write 79.5
Mixed 57.8
SusWrite 99.2
110% 82.2 MB/s
4K Read 0.6
4K Write 1.9
4K Mixed 0.8
94% 1.1 MB/s
524GB free, PID ab20
Operating at USB 3.0 Speed
39.8% Below average
Read 91.7
Write 93.4
Mixed 66.2
106% 83.7 MB/s
4K Read 0.43
4K Write 1.97
4K Mixed 0.28
78% 0.89 MB/s
482GB free, PID ab20
Operating at USB 3.0 Speed
35.2% Below average
Read 78.4
Write 88.4
Mixed 79.4
107% 82.1 MB/s
4K Read 0.63
4K Write 1.44
4K Mixed 0.35
63% 0.81 MB/s
425GB free, PID ab20
Operating at USB 3.0 Speed
SusWrite @10s intervals: 78 74 76 76 76 76 MB/s
33.9% Below average
Read 83.3
Write 65.5
Mixed 49.5
SusWrite 75.8
90% 68.5 MB/s
4K Read 0.5
4K Write 1.7
4K Mixed 0.8
87% 1 MB/s
909GB free, PID ab20
Operating at USB 3.0 Speed
33.3% Below average
Read 78.2
Write 79.5
Mixed 66.5
96% 74.7 MB/s
4K Read 0.42
4K Write 1.49
4K Mixed 0.32
63% 0.75 MB/s
281GB free, PID ab20
Operating at USB 3.0 Speed
SusWrite @10s intervals: 83 81 81 81 81 80 MB/s
31.5% Below average
Read 68.6
Write 89.5
Mixed 42.6
SusWrite 81.4
97% 70.5 MB/s
4K Read 0.5
4K Write 1.2
4K Mixed 0.7
66% 0.8 MB/s
578GB free, PID ab20
Operating at USB 3.0 Speed
31.4% Below average
Read 72
Write 87.8
Mixed 36.8
83% 65.6 MB/s
4K Read 0.25
4K Write 0.57
4K Mixed 0.22
28% 0.35 MB/s
14 MORE »
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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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