Average Bench: 56.6% (227th of 1015)

more Based on 33,696 user benchmarks.  Models: ST500LM021-1KJ152, ST500LM021-1KJ15, ST500LM0 ST500LM021-1KJ15, ST500LM021-1DG142, ST500LM021-1KJ1520V, ST500LM021-1KJ1, ST500LM0 ST500LM021-1KJ1, ST500LM0 21-1KJ152

Average average bench

The Seagate ST500LM021-1KJ152 500GB averaged 43.4% 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 0.66MB/s
Avg. 4K Random Read Speed 0.75MB/s

Below average consistency

The range of scores (95th - 5th percentile) for the Seagate ST500LM021-1KJ152 500GB is 58.8%. This is a relatively wide range which indicates that the Seagate ST500LM021-1KJ152 500GB performs inconsistently under varying real world conditions.


Avg. 4K Random Write Speed 0.82MB/s
Avg. Sequential Mixed IO Speed 56.1MB/s

Average Bench

(Based on 33,696 samples)
Min Avg Max
16.8 Read 105 140
31.8 Write 99.2 135
21.6 Mixed 56.1 74.6
32.1 SusWrite 92.5 138
64.7% 88.2 MB/s
Min Avg Max
0.28 4K Read 0.75 1.1
0.5 4K Write 0.82 1
0.3 4K Mixed 0.66 0.8
120% 0.74 MB/s
User Benchmarks Bench Sequential Random 4k Deep queue 4k
The fastest HDD (mainstream) averages a speed of 100%
466GB free
Firmware: 2501
SusWrite @10s intervals: 123 124 124 125 124 125 MB/s
Read 125
Write 97.1
Mixed 81.5
SusWrite 124
79% 107 MB/s
4K Read 1
4K Write 0.8
4K Mixed 0.7
134% 0.83 MB/s
397GB free (System drive)
Firmware: 0003LIM1
SusWrite @10s intervals: 101 57 94 117 100 101 MB/s
Read 124
Write 123
Mixed 70.1
SusWrite 94.8
76% 103 MB/s
4K Read 1
4K Write 1
4K Mixed 0.8
149% 0.93 MB/s
230GB free (System drive)
Firmware: 0003LIM1
SusWrite @10s intervals: 78 62 75 85 93 97 MB/s
Read 96
Write 109
Mixed 65.7
SusWrite 81.8
65% 88.1 MB/s
4K Read 0.8
4K Write 0.9
4K Mixed 0.8
139% 0.83 MB/s
47GB free
Firmware: 0003LIM1
SusWrite @10s intervals: 66 68 70 71 71 70 MB/s
Read 105
Write 98.1
Mixed 31.2
SusWrite 69.4
55% 76 MB/s
4K Read 0.9
4K Write 0.4
4K Mixed 0.4
89% 0.57 MB/s
33,696 MORE »

 Market Share (See Leaders)

The number of benchmark samples for this model as a percentage of all 39,630,680 HDDs tested.

Typical ST500LM021-1KJ152 500GB Builds (Compare 1,795 builds) See popular component choices, score breakdowns and rankings.
Gaming 5%
Tree trunk
Desktop 51%
Workstation 5%
Tree trunk

System: Dell Latitude E5450

EDIT WITH CUSTOM PC BUILDER Value: 19% - Very poor Total price: $31

Popular ST500LM021-1KJ152 500GB systems:

How Fast Is Your HDD? (Bench your build) Size up your PC in less than a minute.

Welcome to our freeware PC speed test tool. UserBenchmark will test your PC and compare the results to other users with the same components. You can quickly size up your PC, identify hardware problems and explore the best upgrades.

UserBenchmark of the month

How it works

  • - Download and run UserBenchMark.
  • - CPU tests include: integer, floating and string.
  • - GPU tests include: six 3D game simulations.
  • - Drive tests include: read, write, sustained write and mixed IO.
  • - RAM tests include: single/multi core bandwidth and latency.
  • - SkillBench (space shooter) tests user input accuracy.
  • - Reports are generated and presented on userbenchmark.com.
  • - Identify the strongest components in your PC.
  • - See speed test results from other users.
  • - Compare your components to the current market leaders.
  • - Explore your best upgrade options with a virtual PC build.
  • - Compare your in-game FPS to other users with your hardware.
Hard Drive Rankings (Price vs Performance) July 2021 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.
  • Best value for money - Value for money is based on real world performance.
  • Fastest real world speed - Real World Speed measures performance for typical consumers.


1015 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 i5-11400F $239Nvidia RTX 3060-Ti $400Crucial MX500 250GB $45
Intel Core i5-11600K $270Nvidia RTX 3070 $500Samsung 860 Evo 250GB $52
Intel Core i7-10700K $299Nvidia GTX 1660S (Super) $240Samsung 850 Evo 120GB $78
Seagate Barracuda 1TB (2016) $45Corsair Vengeance LPX DDR4 3200 C16 2x8GB $79SanDisk Extreme 64GB $72
WD Blue 1TB (2012) $34Corsair Vengeance LPX DDR4 3000 C15 2x8GB $85SanDisk Extreme 32GB $28
Seagate Barracuda 2TB (2016) $80G.SKILL Trident Z DDR4 3200 C14 4x16GB $649SanDisk Ultra Fit 32GB $16
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