New study finds HGST, WD hard drives fail less often than Seagate and Toshiba
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Bottom line: A study of Backblaze's hard-drive fleet found that HGST and Western Digital drives had lower failure rates than Seagate and Toshiba drives after accounting for factors such as age, capacity, operating temperature, and form factor. The results show how raw fleetwide failure figures can obscure meaningful reliability differences when manufacturers' drives are at different stages of their service lives.
The peer-reviewed IEEE study was written by Christoph Siemroth of the University of Essex and Yeomyung Park of Sungkyunkwan University. It reviewed data on 443,156 drives used in Backblaze data centers from 2013 through the second quarter of 2025. The sample covered more than 1.66 million drive-years.
The researchers found that HGST drives failed at about 41% of Seagate's rate when compared under similar conditions. WD drives failed at about 52% of...
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