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TechnologyGenerated accuracy model review: 2026-05-06

NAS Storage 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

  • Raw TB = drive count * drive size. RAID usable TB depends on mode. Effective usable TB = RAID usable TB * compression ratio * (1 - reserve percent / 100).

Test cases

Default input regression check

Generated from the checked-in default inputs and calculate function.

Inputs

  • Drive Count: 8
  • Drive Size: 12 TB
  • Protection Mode: RAID 6
  • Reserve Space: 15%
  • Compression/Dedupe Ratio: 1.1 :1

Expected outputs

  • Effective Usable Capacity: 67.32 TB
  • Raw Capacity: 96 TB
  • RAID Usable Capacity: 72 TB
  • Fault Tolerance: Two drives

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

  • Uses decimal TB drive ratings.
  • Compression ratio is entered as an effective planning factor.
  • No device information is stored.

Unit handling

  • Drive Count accepts numeric values.
  • Drive Size accepts values in TB.
  • Protection Mode accepts one of the configured options.
  • Reserve Space accepts values in %.
  • Compression/Dedupe Ratio accepts values in :1.
  • Effective Usable Capacity is displayed in TB.
  • Raw Capacity is displayed in TB.
  • RAID Usable Capacity is displayed in TB.

Rounding rules

  • Number displays use up to 2 decimal places in the calculator UI.
  • Input precision follows configured step values where provided.

Version history

1.0.0 - 2026-05-06

Generated accuracy and testing page from the current nas-storage-calculator calculator definition.

Change log

2026-05-06

Published default regression test documentation and metadata fallbacks for NAS Storage Calculator.

Calculator transparency

Accuracy pages are generated from checked-in calculator definitions and can be upgraded with curated review metadata over time.

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