12 Years of HDD Analysis Brings Insight To the Bathtub Curve's Reliability

Backblaze has been tracking hard disk drive failures in its datacenter since 2013. The backup and cloud storage company's latest analysis of approximately 317,230 drives shows that peak failure rates have dropped dramatically and shifted much later in a drive's lifespan. Where the company once saw failure rates of 13.73% at around three years in 2013 and 14.24% at seven years and nine months in 2021, the current data shows a peak of just 4.25% at 10 years and three months.

This represents the first time the company has observed the highest failure rate occurring at the far end of the drive curve rather than earlier in its operational life, it said. The drives maintained relatively consistent failure rates through most of their use before spiking sharply near the end. The improvement amounts to roughly one-third of the previous peak failure rates.

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