Average seagate power on time4/15/2023 ![]() Those 1.5TB Seagate drives are mostly split between two models. ![]() These numbers show just how useless the manufacturer's MTBF numbers can really be. Backblaze's data names names and shows some big differences between the manufacturers. Even when studies are published, the data within them is often anonymized. These failures are generally assumed to follow a so-called bathtub curve, with relatively high failure rates when the drive is new-"infant mortality," caused by manufacturing defects-and similarly when the drive nears the end of its useful life, but low failure rates in between.ĭata to actually support these beliefs, however, has always been a little scarce. The main reliability measure used of hard disks is the mean time between failures (MTBF), and typically this is quoted as being somewhere between 100,000 and 1 million hours, or between 11 and 110 years. Hard drive manufacturers like to claim that their disks are extremely reliable. Their collection of more than 27,000 consumer-grade drives indicated that the Hitachi drives have a sub-two percent annualized failure rate, compared to three to four percent for Western Digital models, and as high as 25 percent for some Seagate units. Hitachi drives crush competing models from Seagate and Western Digital when it comes to reliability, according to data from cloud backup provider Backblaze.
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