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StashRaid

Storage Parameters

Usable Capacity

12 TB

Fault Tolerance

4

Array Resilience

Architecture

RAID 5 • Parity

Fault Tolerance

1 Concurrent Failures Allowed

Current Configuration

RAID 5 (Parity)

12 TB Usable

Total RAW: 16 TB

Disk 01DATA
Disk 02DATA
Disk 03DATA
Disk 04PARITY

Total Drives

4 x 4 TB

Efficiency

75% Utilized

Usable: 12 TBWasted to redundancy: 4 TB

Pros & Cons

  • PRO: Good balance of capacity/speed/safety

  • PRO: Cost-effective redundancy

  • CON: Slower writes due to parity calculation

    This setup prioritizes redundancy but has associated performance or capacity costs.

About StashRaid

StashRaid is a professional-grade RAID capacity and performance calculator. We support RAID 0, 1, 5, 6, 10, 50, 60, JBOD, ZFS RAID-Z1/Z2/Z3, Synology SHR/SHR-2, and unRAID — including per-drive mixed-sizing for all levels.

What We Do

Our calculator helps you plan storage arrays with accurate usable capacity, fault-tolerance estimates, and sequential read/write performance projections. Every calculation is backed by the Arcserve write-penalty framework and cross-referenced against real-world benchmarks.

Beyond the calculator, our in-depth guides cover hardware selection, RAID architecture, storage protocols, failure mathematics, and best practices — written for everyone from first-time NAS builders to seasoned storage architects.

Our Values

  • Transparency: Every formula and multiplier we use is documented on our Performance Methodology page. No black boxes.
  • Accuracy: We cite real academic and industry sources — Arcserve, SNIA, Ars Technica benchmarks, the OpenZFS community.
  • Practicality: Guides focus on real-world scenarios and hardware you can actually buy, not theoretical edge cases.

Disclaimer

StashRaid is an educational tool. Real-world drive capacity varies based on filesystem overhead, formatting, and manufacturer math. We are not responsible for data loss or hardware purchasing decisions made using our calculators. Always maintain backups.