![]() ![]() The reason for the difference is that Backblaze is constantly adding and subtracting drives. Using the drive count method, model BB007 had a failure rate of 0.93%. Method On How Backblaze Is Able To Produce Accurate Data With The Addition Of New Drives They use 60 drives as a minimum as there are 60 drives in all newly deployed Storage Pods. When they report quarterly, yearly, or lifetime drive statistics, those models with less than 60 drives are not included in the calculations or graphs. For example, they have: 20 Toshiba 16TB drives (model: MG08ACA16TA), 20 HGST 10TB drives (model: HUH721010ALE600), and 20 Toshiba 8TB drives (model: HDWF180). There were 195 drives (129,959 minus 129,764) that were not included in the list above because they were used as testing drives or they did not have at least 60 drives of a given model. In both cases, the 0% AFR for the quarter is impressive. If the 8TB model had 1 (one) failure in the quarter, the AFR would only be 0.40% and the 12TB model would have an AFR of just 0.26% with 1 (one) failure for the quarter. On the contrary, both of the HGST drives with 0 (zero) failures in the quarter have a reasonable number of drive days, so the AFR is less volatile. Similarly, the Toshiba 4TB drive AFR would be 4.05% with just one failure in the quarter. For example, if just one Seagate 16TB drive had failed, the AFR would be 7.25% for the quarter. As a consequence, the AFR can range widely from a small change in drive failures. None of the Toshiba 4TB and Seagate 16TB drives failed in Q1, but both drives had less than 10,000 drive days during the quarter. In addition, the Q1 2020 AFR is significantly lower than the Q1 2019 AFR which was 1.56%.ĭuring this quarter 4 (four) drive models, from 3 (three) manufacturers, had 0 (zero) drive failures. That is the lowest AFR for any quarter since they started keeping track in 2013. The Annualized Failure Rate (AFR) for Q1 2020 was 1.07%. ![]() The table below covers what happened in Q1 2020. This leaves them with 129,764 hard drives. For their evaluation, they removed from consideration those drives that were used for testing purposes and those drive models for which they did not have at least 60 drives (see why below). Hard Drive Failure Stats for Q1 2020 - Seagate Suffered The Worst LossesĪt the end of Q1 2020, Backblaze was using 129,959 hard drives to store customer data. This review looks at the Q1 2020 and lifetime hard drive failure rates of the data drive models currently in operation in their data centers and provides a handful of insights and observations along the way. Of that number, there were 2,380 boot drives and 129,959 data drives. As of March 31, 2020, Backblaze had 132,339 spinning hard drives in their cloud storage ecosystem spread across four data centers.
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