Average Bench: 19.9% (976th of 1002)

Based on 943 user benchmarks.  Models: ST9160821AS, ST916082 1AS, ST916082 ST9160821AS

Terrible average bench

The Seagate ST9160821AS 160GB averaged 80.1% 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.


Avg. 4K Random Mixed IO Speed 0.22MB/s
Avg. 4K Random Read Speed 0.36MB/s

Very good consistency

The range of scores (95th - 5th percentile) for the Seagate ST9160821AS 160GB is just 10.5%. This is a relatively narrow range which indicates that the Seagate ST9160821AS 160GB performs reasonably consistently under varying real world conditions.


Avg. Sequential Write Speed 34.3MB/s
Avg. Sequential Read Speed 34.8MB/s

Average Bench

(Based on 943 samples)
Min Avg Max
24.3 Read 34.8 43
23.6 Write 34.3 42.9
15.6 Mixed 29.9 41.3
24.8% 33 MB/s
Min Avg Max
0.08 4K Read 0.36 0.5
0.14 4K Write 0.59 0.79
0.07 4K Mixed 0.22 0.29
50.3% 0.39 MB/s
User Benchmarks Bench Sequential Random 4k Deep queue 4k
The fastest HDD (mainstream) averages a speed of 100%
149GB free
Firmware: 3.BHD Max speed: SATA 1.0 150 MB/s
Read 43.1
Write 42.1
Mixed 42.8
32% 42.7 MB/s
4K Read 0.49
4K Write 0.65
4K Mixed 0.27
62% 0.47 MB/s
4GB free
Firmware: 3.ALC Max speed: SATA 1.0 150 MB/s
Read 37.5
Write 35.2
Mixed 23.2
24% 32 MB/s
4K Read 0.06
4K Write 0.48
4K Mixed 0.14
27% 0.23 MB/s
108GB free
Firmware: 3.BHE Max speed: SATA 1.0 150 MB/s
Read 36.4
Write 33.6
Mixed 34.2
26% 34.8 MB/s
4K Read 0.36
4K Write 0.67
4K Mixed 0.25
55% 0.42 MB/s
63GB free
Firmware: 3.ALC Max speed: SATA 1.0 150 MB/s
Read 31.4
Write 31.8
Mixed 30.7
24% 31.3 MB/s
4K Read 0.33
4K Write 0.39
4K Mixed 0.19
42% 0.3 MB/s
123GB free
Firmware: 3.BH Max speed: SATA 1.0 150 MB/s
Read 31.3
Write 30.4
Mixed 29
23% 30.2 MB/s
4K Read 0.27
4K Write 0.45
4K Mixed 0.18
39% 0.3 MB/s
48GB free
Firmware: 3.BHD Max speed: SATA 1.0 150 MB/s
Read 28.8
Write 31.4
Mixed 28.9
22% 29.7 MB/s
4K Read 0.38
4K Write 0.74
4K Mixed 0.26
59% 0.46 MB/s
28GB free
Firmware: 3.CDD Max speed: SATA 1.0 150 MB/s
Read 26.7
Write 24.4
Mixed 28
20% 26.4 MB/s
4K Read 0.39
4K Write 0.66
4K Mixed 0.22
53% 0.42 MB/s
943 MORE »

 Market Share (See Leaders)

The number of benchmark samples for this model as a percentage of all 8,717,694 HDDs tested.


AmazonUS $2515 mins
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Typical ST9160821AS 160GB Builds (Compare 99 builds) See popular component choices, score breakdowns and rankings.
Gaming 11%
Tree trunk
Desktop 21%
Workstation 13%
Tree trunk

System: Dell Inspiron 1720

EDIT WITH CUSTOM PC BUILDER Value: 36% - Below average Total price: $117

Popular ST9160821AS 160GB systems:

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  • - GPU tests include: six 3D game simulations.
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Hard Drive Rankings (Price vs Performance) April 2018 HDD Rankings.

We calculate effective speed which measures performance for typical consumers. Effective speed is adjusted by current cost per GB to yield value for money. Our calculated values are checked against thousands of individual user ratings. The customizable table below combines these factors to bring you the definitive list of top HDDs. [HDrivePro]


Group Test Results

  • Best user rated - User sentiment trumps benchmarks for this comparison.
  • Fastest effective speed - Real World Speed measures performance for typical consumers.
  • Best value for money - Value for money is based on real world performance, price and capacity.


1002 Drives (Compared) Thousands of user benchmarks compiled into one comparison list.

See how consistently different HDDs perform with varying real world conditions. The charts also illustrate overall performance, popularity and rank.

 Frequently Asked Questions

 Best User Rated

The Best.
Intel Core i7-8700K $330Nvidia GTX 1070 $447Samsung 850 Evo 250GB $80
AMD Ryzen 5 1600 $170Nvidia GTX 1060-6GB $325Samsung 850 Evo 500GB $135
Intel Core i7-7700K $290AMD RX 480 $350Samsung 850 Pro 256GB $163
Seagate Barracuda 1TB (2016) $44Corsair Vengeance LPX DDR4 3000 C15 2x8GB $190SanDisk Extreme 64GB $70
Seagate Barracuda 3TB (2016) $80G.SKILL Trident Z DDR4 3200 C14 4x16GB $931SanDisk Extreme 32GB $45
Seagate Barracuda 2TB (2016) $60Corsair Vengeance LPX DDR4 3200 C16 2x8GB $204SanDisk Ultra Fit 32GB $12
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