MTBF — Mean Time Between Failures
Definition
A reliability metric expressing the average time between hardware failures, typically measured in hours.
Context & Usage
Enterprise HDDs have MTBF of 1.0-2.5 million hours (~115-285 years). Enterprise SSDs: 2.0-2.5 million hours. Servers and switches: 100,000-500,000 hours. MTBF is a statistical average — actual deployment failures follow a bathtub curve (high early-life failure rate, low mid-life, increasing late-life). MTBF is NOT a warranty period; it's a population average.
Examples
- Seagate Exos 22TB: MTBF 2.5M hours
- Samsung PM1735 SSD: MTBF 2M hours
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