Hard Drive Reliability: 13-Year Study Debunks Bathtub Curve Failure Model
By
HieronymusBosch
Sesame, salt, and substance. A flagship bake.
Summary
Backblaze's 13-year analysis of hard drive reliability data reveals that the traditional 'bathtub curve' model of drive failures (predicting high early failures, low mid-life failures, and high late-life failures) does not accurately represent modern hard drive behavior. Instead, the data shows irregular failure patterns with dips, spikes, and plateaus. The key finding is that hard drives are actually failing less frequently and lasting longer than previously expected, challenging long-held reliability engineering assumptions.
Key quotes
· 4 pulledOur fleet showed dips, spikes, and plateaus that refused to behave.
Now, after 13 years of continuous data, the picture is clearer—and stranger.
The bathtub curve isn't just leaking, it's fundamentally inaccurate for modern hard drives.
Hard drives are failing less and lasting longer than traditional models predicted.
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