Average Bench: 33.6% (646th of 1015)

Based on 4 user benchmarks.  Model: OKSTOR iStorage
Poor: 12%Average: 33.6% Great: 50%

Poor average bench

The Okstor iStorage 250GB averaged 66.4% 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 3.05MB/s
Avg. 4K Random Read Speed 1.25MB/s

Unknown consistency

There are too few samples to reasonably determine how consistently this HDD perfroms. This result should be interpreted with caution.


Avg. Sustained Write Speed 1.1MB/s
Avg. Sequential Write Speed 48.5MB/s

Average Bench

(Based on 4 samples)
Min Avg Max
38.9 Read 68.1 95.1
2 Write 48.5 81.3
4.7 Mixed 50.3 93
1.1 SusWrite 1.1 1.1
31.5% 42 MB/s
Min Avg Max
0.2 4K Read 1.25 3.09
1.3 4K Write 1.95 3.03
0.26 4K Mixed 3.05 5.1
427% 2.08 MB/s
User Benchmarks Bench Sequential Random 4k Deep queue 4k
The fastest HDD (mainstream) averages a speed of 100%
79GB free
Firmware: 0
Read 95.1
Write 78.4
Mixed 71.1
61% 81.5 MB/s
4K Read 0.42
4K Write 3.03
4K Mixed 4.89
617% 2.78 MB/s
233GB free
Firmware: 0
Read 91.5
Write 81.3
Mixed 93
67% 88.6 MB/s
4K Read 0.2
4K Write 1.46
4K Mixed 0.26
65% 0.64 MB/s
97GB free
Firmware: 0
Read 46.7
Write 32.2
Mixed 32.5
28% 37.1 MB/s
4K Read 3.09
4K Write 2
4K Mixed 1.95
382% 2.35 MB/s
81GB free
Firmware: 0
SusWrite @10s intervals: 1.1 1.1 1 1.2 1.1 1.1 MB/s
Read 38.9
Write 2
Mixed 4.7
SusWrite 1.1
8% 11.7 MB/s
4K Read 1.3
4K Write 1.3
4K Mixed 5.1
645% 2.57 MB/s

 Market Share (See Leaders)

The number of benchmark samples for this model as a percentage of all 21,735,478 HDDs tested.

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.

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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.
  • - 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.
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  • - Share your opinion by voting.
Hard Drive Rankings (Price vs Performance) December 2019 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 i5-9400F $145Nvidia GTX 1660S (Super) $244Crucial MX500 250GB $44
Intel Core i5-9600K $200Nvidia RTX 2060 $324Samsung 850 Evo 120GB $150
Intel Core i7-9700K $360AMD RX 590 $180Samsung 860 Evo 250GB $55
Seagate Barracuda 1TB (2016) $38Corsair Vengeance LPX DDR4 3200 C16 2x8GB $76SanDisk Extreme 64GB $72
WD Blue 1TB (2012) $34Corsair Vengeance LPX DDR4 3000 C15 2x8GB $58SanDisk Extreme 32GB $46
Seagate Barracuda 3TB (2016) $80G.SKILL Trident Z DDR4 3200 C14 4x16GB $613SanDisk Extreme 16GB $24
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