Editorial principles
- Publish the formula and units.
- Send vendor-specific questions to official tools.
- Do not promise unverified savings or drive life.
- Prefer original problem-solving guides over mass-generated pages.
Ads and tracking
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Calculation limits
CCTV results assume the entered average bitrate remains representative. RAID results assume equal-size drives and simplified array capacity. Filesystem metadata, bad-block reserves, and vendor allocations vary.
Corrections
Reproducible calculation errors receive a failing test before a code change. Last reviewed: August 20, 2026.