Average Bench: 39.3% (525th of 1015)

more Based on 14,637 user benchmarks.  Models: WDC WD10S21X-24R1BT0-SSHD-8GB, WDC WD10S21X-24R, WDC WD10 S21X-24R1BT0, WDC WD10S21X-24R1BT0-SSH, WDC WD10S21X-24R1BT0, WDC WD10 S21X-24R1BT0-SSH

Poor average bench

The WD WD10S21X-24R1BT0-SSHD-8GB 1TB averaged 60.6% 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 0.64MB/s
Avg. 4K Random Write Speed 1.73MB/s

Average consistency

The range of scores (95th - 5th percentile) for the WD WD10S21X-24R1BT0-SSHD-8GB 1TB is 41.7%. This is a relatively wide range which indicates that the WD WD10S21X-24R1BT0-SSHD-8GB 1TB performs inconsistently under varying real world conditions.


Avg. Sequential Mixed IO Speed 43.2MB/s
Avg. Sustained Write Speed 58.6MB/s

Average Bench

(Based on 14,637 samples)
Min Avg Max
22 Read 78.2 109
19.8 Write 70.2 103
17.1 Mixed 43.2 58.7
23.7 SusWrite 58.6 105
46% 62.6 MB/s
Min Avg Max
0.1 4K Read 0.49 0.6
0.4 4K Write 1.73 2.3
0.1 4K Mixed 0.64 0.8
123% 0.95 MB/s
User Benchmarks Bench Sequential Random 4k Deep queue 4k
The fastest HDD (mainstream) averages a speed of 100%
849GB free (System drive)
Firmware: 03.01A01
SusWrite @10s intervals: 50 67 62 79 91 91 MB/s
Read 98.1
Write 64.6
Mixed 54.3
SusWrite 73.4
54% 72.6 MB/s
4K Read 0.6
4K Write 2.1
4K Mixed 0.6
131% 1.1 MB/s
690GB free (System drive)
Firmware: 03.01A01
SusWrite @10s intervals: 42 55 73 78 90 82 MB/s
Read 82.7
Write 62
Mixed 52.8
SusWrite 70.2
49% 66.9 MB/s
4K Read 0.4
4K Write 1.5
4K Mixed 0.3
78% 0.73 MB/s
849GB free (System drive)
Firmware: 03.01A01
SusWrite @10s intervals: 54 51 57 55 50 63 MB/s
Read 85.4
Write 70.9
Mixed 54.1
SusWrite 55.1
49% 66.4 MB/s
4K Read 0.5
4K Write 1.9
4K Mixed 0.7
134% 1.03 MB/s
543GB free (System drive)
Firmware: 03.01A02
SusWrite @10s intervals: 57 53 54 48 51 55 MB/s
Read 75.1
Write 73.3
Mixed 48.8
SusWrite 53
46% 62.5 MB/s
4K Read 0.5
4K Write 1.5
4K Mixed 0.6
115% 0.87 MB/s
397GB free (System drive)
Firmware: 03.01A02
SusWrite @10s intervals: 54 45 45 36 45 58 MB/s
Read 67.5
Write 72.5
Mixed 29.8
SusWrite 47.2
40% 54.2 MB/s
4K Read 0.2
4K Write 1.4
4K Mixed 0.6
101% 0.73 MB/s
14,637 MORE »

 Market Share (See Leaders)

The number of benchmark samples for this model as a percentage of all 29,522,141 HDDs tested.

Typical WD10S21X-24R1BT0-SSHD-8GB 1TB Builds (Compare 2,579 builds) See popular component choices, score breakdowns and rankings.
Gaming 7%
Tree trunk
Desktop 62%
Workstation 7%
Tree trunk

System: Lenovo 20378


Popular WD10S21X-24R1BT0-SSHD-8GB 1TB systems:

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  • - CPU tests include: integer, floating and string.
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Hard Drive Rankings (Price vs Performance) August 2020 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.


Added n/a ago.


23 months ago.

Took this out of seldom used Lenovo Y50 to use in Lenovo Y530, with knowledge that it has horrible performance. It did not disappoint with that. Planning on using this as external and get others instead..

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.
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Intel Core i5-9400F $156Nvidia GTX 1650S (Super) $170Samsung 850 Evo 120GB $78
Intel Core i7-9700K $335Nvidia RTX 2070S (Super) $510Samsung 860 Evo 250GB $50
Seagate Barracuda 1TB (2016) $40Corsair Vengeance LPX DDR4 3200 C16 2x8GB $60SanDisk Extreme 64GB $72
WD Blue 1TB (2012) $34Corsair Vengeance LPX DDR4 3000 C15 2x8GB $69SanDisk Extreme 32GB $46
Seagate Barracuda 3TB (2016) $85G.SKILL Trident Z DDR4 3200 C14 4x16GB $681SanDisk Extreme 16GB $24
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