The AFR for 2020 for all drive models was 0.93%, which was less than half the AFR for 2019. The 6TB Seagate model was followed closely by the perennial contenders from HGST: the 4TB drive (model: HMS5C4040ALE640) at 0.27%, the 4TB drive (model: HMS5C4040BLE640), at 0.27%, the 8TB drive (model: HUH728080ALE600) at 0.29%, and the 12TB drive (model: HUH721212ALE600) at 0.31%. This model was also the oldest, in average age, of all the drives listed. We present the models with less than 250,000 drive days for completeness only.įor drive models with over 250,000 drive days over the course of 2020, the Seagate 6TB drive (model: ST6000DX000) leads the way with a 0.23% annualized failure rate (AFR). There is not enough data over the year-long period to reach any conclusions. #BACKBLAZE HARD DRIVE RELIABILITY DOWNLOAD#The data for all drives, data drives, boot drives, etc., is available for download on the Hard Drive Test Data webpage.įor drives which have less than 250,000 drive days, any conclusions about drive failure rates are not justified. The 231 drives not included in the list above were either used for testing or did not have at least 60 drives of the same model at any time during the year. This leaves us with 162,299 hard drives in 2020, as listed below. For our evaluation, we remove from consideration 231 drives which were used for testing purposes and those drive models for which we did not have at least 60 drives. 2020 Hard Drive Failure RatesĪt the end of 2020, Backblaze was monitoring 162,530 hard drives used to store data. Along the way, we’ll share observations and insights on the data presented and as always, we look forward to you doing the same in the comments. In addition, we’ll welcome back Western Digital to the farm and get a look at our nascent 16TB and 18TB drives. We will discuss the boot drives later in this report, but first we’ll focus on the hard drive failure rates for the data drive models in operation in our data centers as of the end of December. Of that number, there were 3,000 boot drives and 162,530 data drives. In 2020, Backblaze added 39,792 hard drives and as of Decemwe had 165,530 drives under management.
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