After all, most data centers and individuals want hard drives to last more than a few months.
Showing data for just one year is not necessarily a completely accurate picture of how they will fair in the long term. Average capacity grew from 4.5TB in 2016 up to 7.7TB for 2018. Just over 1,200 14TB drives were also added to their data center for the first time. Backblaze removed Western Digital 4TB drives to replace them with 12TB HGST and Seagate units. The average hard drive size is the most drastic change between recent years. In 2016, the average failure rate was 1.95 percent, showing that improvements in reliability are steadily being made. The annualized failure rate for 2018 sits at 1.25 percent, down from 1.77 percent. Backblaze suggests only considering drives with more than 50,000 drive days of operation and those with at least 500 drives in the sample.Ĭompared to 2017, hard drive failure rates are significantly lower. There are models shown with zero percent failure rates, but this is a result of small sample size, not an indication of superior reliability. To eliminated any outliers, models with less than 50 operating drives can be ignored. Continuing forward, we will dig in and see what the most reliable hard drive of 2018 was. The annual hard drive failure report is now out for 2018, including statistics on more than 100,000 hard drives. Backblaze has published its annual report that gives insight into which drives are reliable and what capacities and models have lasted the longest over time.įor the past five years, Backblaze has published quarterly and annual reports on hard drive failure rates. Why it matters: Most enthusiasts have moved on to solid state drives, but mechanical hard drives are still necessary for storing mass amounts of information in data centers.
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