Monday, May 09, 2016

data: HDD reliability

Who makes the most reliable hard drives? (updated) | ExtremeTech
"Backblaze ... buys whatever drive offers the most competitive dollar-per-gigabyte ratio, with reliability being a secondary factor
As of the end of December 2014, Backblaze had 15,528 Seagate drives, 22,902 Hitachi drives, 1,174 Western Digital drives, and 47 Toshiba drives. These drives are not all the same age — some are several years old, while many were installed in the past year, including thousands of brand new 4TB and even a few 6TB models.
Hitachi drives are by far the most reliable. Even though many of Backblaze’s Hitachi drives are several years old, they only have an annual failure rate of 2% or so on average. And the latest HGST drives have a failure rate of just 1.4%. The “annual failure rate” is the chance of a drive dying within a 12-month period.

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