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TechnologyGenerated accuracy model review: 2026-05-06
RAID Calculator accuracy and testing
This page documents how Calwarden builds trust for this calculator: source notes, regression-style default tests, limitations, assumptions, unit handling, rounding, and visible change history.
Formula source
- RAID 0: N*S. RAID 1: S. RAID 5: (N-1)*S. RAID 6: (N-2)*S. RAID 10: (N/2)*S.
Test cases
Default input regression check
Generated from the checked-in default inputs and calculate function.
Inputs
- RAID Level: RAID 5
- Number of Disks: 4
- Size per Disk: 4 TB
Expected outputs
- Usable Capacity: 12 TB
- Protection/Overhead: 4 TB
- Fault Tolerance: 1 Disk
Known limitations
- This page documents the checked-in calculator logic and does not certify results for every real-world edge case.
- Use the result as a planning estimate unless the calculator page states a stricter purpose.
Assumptions
- Disk count should be a whole number and disk size should be a positive number.
- All disks are assumed to be the same size, so the array is limited by the smallest member drive in real life.
- Invalid RAID-level requirements, such as too few disks for RAID 5/6/10, return an invalid configuration state.
Unit handling
- RAID Level accepts one of the configured options.
- Number of Disks accepts numeric values.
- Size per Disk accepts values in TB.
- Usable Capacity is displayed in TB.
- Protection/Overhead is displayed in TB.
Rounding rules
- Number displays use up to 2 decimal places in the calculator UI.
Version history
1.0.0 - 2026-05-06
Generated accuracy and testing page from the current raid-calculator calculator definition.
Change log
2026-05-06
Published default regression test documentation and metadata fallbacks for RAID Calculator.
Calculator transparency
Accuracy pages are generated from checked-in calculator definitions and can be upgraded with curated review metadata over time.