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The top two rows seem to be contradictory. How can you have a smaller annual failure rate AND a smaller average age? Name/Model Size Number of Drives
by zkhalique 12y ago
The top two rows seem to be contradictory. How can you have a smaller annual failure rate AND a smaller average age?
Name/Model Size Number of Drives Average Age in years Annual Failure Rate 95% Confidence Interval
HGST Deskstar 7K2000
(HDS722020ALA330) 2.0 TB 4,641 3.9 1.1% 0.8% – 1.4%
HGST Deskstar 5K3000
(HDS5C3030ALA630) 3.0 TB 4,595 2.6 0.6% 0.4% – 0.9%
- sib 12y agoReading the model numbers and sizes, the top row is 2TB drives, the second row is 3TB; the 3TB were launched more recently. So, they have a smaller average age. And, apparently, they also fail at a lower rate.