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WDWD6401AALS
Group Average(9 Highest-Voted)
▲ 504 ▼

Release date ≤ Q4 2013.

VS
Effective Speed 
+77%
Real World Speed
Performance profile from 19,988 user samples
Benchmark your HDD here
19,988 User Benchmarks
Best Bench: 65% 595GB free
Worst Bench: 32% 48GB free
Poor: 32% Great: 65%
SPEED RANK: 310th / 1015
Effective Speed
Effective HDD Speed 		49.6 % 87.8 % Much faster effective speed.
+77%
Average Score 
+33%
Read
Avg. Sequential Read Speed 		89.3 MB/s 155 MB/s Much faster read speed.
+74%
Write
Avg. Sequential Write Speed 		85.9 MB/s 136 MB/s Much faster write speed.
+59%
4K Read
Avg. 4K Random Read Speed 		0.78 MB/s 0.86 MB/s Slightly faster random read.
+10%
4K Write
Avg. 4K Random Write Speed 		2.06 MB/s +4% 1.99 MB/s
Mixed
Avg. Sequential Mixed IO Speed 		65.9 MB/s 79.2 MB/s Faster mixed IO speed.
+20%
4K Mixed
Avg. 4K Random Mixed IO Speed 		0.89 MB/s Slightly faster random mixed IO.
+7% 		0.83 MB/s
SusWrite
Avg. Sustained Write Speed 		83.1 MB/s 150 MB/s Hugely faster sustained write speed.
+81%
Peak Score 
+33%
Read
Peak Sequential Read Speed 		116 MB/s 199 MB/s Much faster peak read speed.
+71%
Write
Peak Sequential Write Speed 		113 MB/s 180 MB/s Much faster peak write speed.
+60%
4K Read
Peak 4K Random Read Speed 		0.9 MB/s 1.03 MB/s Faster peak random read.
+15%
4K Write
Peak 4K Random Write Speed 		2.6 MB/s Slightly faster peak random write.
+5% 		2.47 MB/s
Mixed
Peak Sequential Mixed IO Speed 		83 MB/s 93.6 MB/s Faster peak mixed IO speed.
+13%
4K Mixed
Peak 4K Random Mixed IO Speed 		1 MB/s 1 MB/s
SusWrite
Peak Sequential Sustained Write 60s Average 		111 MB/s 195 MB/s Much faster peak sustained write speed.
+75%
Value & Sentiment 
+3,009%
Market Share
Based on 53,964,357 HDDs tested
See market share leaders
User Rating
UBM User Rating 		50 % 59.6 % More popular.
+19%
Market Share
Market Share (trailing 30 days) 		0.03 % 3.47 % Insanely higher market share.
+11,452%
Price
Price (score) 		$75 63.2 USD Cheaper.
+19%
Value
Value For Money 		8.46 % 54.7 % Hugely better value.
+547%
Nice To Haves 
+5%
Age
Newest 		131+ Months 125 Months Slightly more recent.
+5%
Specifications 
Capacity
Capacity 		640GB   —
User Builds 
19,988
Custom PC Builder (Start a new build) Build your perfect PC: compare component prices, popularity, speed and value for money

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Hard Drive Rankings (Price vs Performance) November 2024 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.
How Fast Is Your HDD? (Bench your build) Size up your PC in less than a minute

Welcome to our 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 value for money upgrades.

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  • - Drive tests include: read, write, sustained write and mixed IO
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  • - SkillBench (space shooter) tests user input accuracy
  • - Reports are generated and presented on userbenchmark.com
  • - Identify the strongest components in your PC
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