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Backblaze Publishes 2015 Hard Drive Reliability Stats

Cloud backup service Backblaze has once again shared its internal statistics on the reliability of hard drives in its data center. In the cumulative failure data dating back to April 2013, Western Digital’s drives had the highest rate of failure, at around 7 percent, while HGST’s had the lowest, at just over 1 percent. However, when looking at 4 TB drives, which now comprise 75 percent of Backblaze’s drives, Seagate, Toshiba, and Western Digital hover around a 3 percent failure rate. HGST 4 TB drives are again the best, with a failure rate under 1 percent, but Backblaze stopped buying those drives because they were replaced with more expensive models.

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