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Backblaze Hard Drive Reliability Stats for 2018 Published

In the market for a new hard drive and concerned about reliability? Every quarter Backblaze publishes its hard drive failure rate statistics to the public categorized by manufacturer and drive size. Other useful statistics such as service and uptime are also included in the report. Backblaze is one of the largest online cloud backup storage solutions with tens of thousands of hard drives currently in use so you can bet they go through a lot of drives.

With such a large sample size in such a controlled environment these stats are overall quite accurate with how drives are performing based on each manufacturer. The report includes a lot of data that is definitely worth a read. Overall, Seagate was probably the worst offender when it comes to failed HDDs over other brands such as Western Digital or Hitachi.

We saw similar results for Q2 of last year. Based on this data either HGST, or Hitachi would be a solid choice when it comes to preserving your data. Seagate and some Toshiba drives tended to be more prone to premature failures.

Backblaze Hard Drive Reliability Statistics 2018

Also check out Backblaze’s blog post which includes cumulative data as to hard drive failure rates as far back as 2014. Here is an extract from the data below.

Model Size Number
of Drives
Age in
Seagate Desktop HDD.15 (ST4000DM000) 4.0TB 5199 0.3 3.8%
Hitachi GST Deskstar 7K2000 (HDS722020ALA330) 2.0TB 4716 2.9 1.1%
Hitachi GST Deskstar 5K3000 (HDS5C3030ALA630) 3.0TB 4592 1.7 0.9%
Seagate Barracuda (ST3000DM001) 3.0TB 4252 1.4 9.8%
Hitachi Deskstar 5K4000 (HDS5C4040ALE630) 4.0TB 2587 0.8 1.5%
Seagate Barracuda LP (ST31500541AS) 1.5TB 1929 3.8 9.9%
Hitachi Deskstar 7K3000 (HDS723030ALA640) 3.0TB 1027 2.1 0.9%
Seagate Barracuda 7200 (ST31500341AS) 1.5TB 539 3.8 25.4%
Western Digital Green (WD10EADS) 1.0TB 474 4.4 3.6%
Western Digital Red (WD30EFRX) 3.0TB 346 0.5 3.2%
Seagate Barracuda XT (ST33000651AS) 3.0TB 293 2.0 7.3%
Seagate Barracuda LP (ST32000542AS) 2.0TB 288 2.0 7.2%
Seagate Barracuda XT (ST4000DX000) 4.0TB 179 0.7 n/a
Western Digital Green (WD10EACS) 1.0TB 84 5.0 n/a
Seagate Barracuda Green (ST1500DL003) 1.5TB 51 0.8 120.0%


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