![]() In the table above, we list all of the models for completeness, but it does make the chart more complex. The wider the gap, the less confident we are about the AFR in the first place. What's common between these three models? The sample size, in our case drive days, is too small, and in these three cases leads to a wide range between the low and high confidence interval values. The Toshiba 16TB (model: MG08ACA16TA at 3.57%. That is the same as last quarter and down from 1.45% one year ago ().Ī quick glance down the annualized failure rate (AFR) column identifies the three drives with the highest failure rates: The lifetime annualized failure rate for all the drives listed above is 1.39%. Notes and Observations About the Lifetime Stats This leaves us with 215,011 hard drives grouped into 27 different models to analyze for the lifetime report. For our evaluation, we removed 413 drives from consideration as they were used for testing purposes or drive models which did not have at least 60 drives. As of June 30, 2022, Backblaze was monitoring 215,424 hard drives used to store data. We'll cover the Q2 data later on in this post. This report, we'll change things up a bit and start with the lifetime failure rates. Along the way, we'll share our observations and insights on the data presented and, as always, we look forward to you doing the same in the comments section at the end of the post. ![]() Today, we'll focus on the 215,424 data drives under management as we review their quarterly and lifetime failure rates as of the end of Q2 2022. Later this quarter, we'll review our SSD collection. Of that number, 4,020 are boot drives, with 2,558 being SSDs, and 1,462 being HDDs. As of the end of Q2 2022, Backblaze was monitoring 219,444 hard drives and SSDs in our data centers around the world.
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