![]() ![]() While comparing the annual failure rates of hard drives over multiple years is a great way to spot trends, we also look at the lifetime annualized failure rates of our hard drives. That’s based on 1,220 drives and nearly 500,000 drive days, making the AFR pretty solid. The Seagate 10 TB drives (model: ST10000NM0086) continue to impress as their AFR for 2018 was just 0.33%.While the drive count is small, that’s still a pretty good run. None of the 45 Toshiba 5 TB drives (model: MD04ABA500V) has failed since Q2 2016. ![]() The 2018 annualized failure rate of 1.25% was the lowest by far of any year we’ve recorded.By 2018 the average size had grown to 7.7 TB. In 2016 the average size of hard drives in use was 4.5 TB.The data for each year is inclusive of that year only. The chart below compares each of the last three years. First, the migration to larger drives, and second, the improvement in the overall annual failure rate each year. ![]() When we compare Hard Drive stats for 2018 to previous years two things jump out. The initial annualized failure rate (AFR) is just over 3%, which is similar to the other new models and we would expect the AFR to drop over time as the drives settle in.Ĭomparing Hard Drive Failure Rates Over Time These are helium-filled PMR (perpendicular magnetic recording) drives.
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