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Region Focus · EU

EU RAID 6 vs RAID 5 Storage Calculator

Compare usable capacity, fault tolerance, and efficiency between RAID 6 and RAID 5 for EU homelab setups.

Comparison Notes

This page compares RAID 6 and RAID 5 on identical hardware assumptions to help homelab builders choose between capacity efficiency and fault tolerance.

  • Disk size baseline: 8TB drives
  • Reserve policy: 10% filesystem headroom
  • Use the interactive tool for exact real-world constraints
Open Interactive Planner →

Storage Capacity Table

Drives RAID 6 RAID 5 Delta
4x 8TB 14.40 TB 21.60 TB -7.20 TB
6x 8TB 28.80 TB 36.00 TB -7.20 TB
8x 8TB 43.20 TB 50.40 TB -7.20 TB
10x 8TB 57.60 TB 64.80 TB -7.20 TB
12x 8TB 72.00 TB 79.20 TB -7.20 TB

EU Buyer Context

EU deployments often place additional emphasis on energy efficiency and predictable lifecycle upgrades, especially for always-on NAS fleets.

Brand / Region Glossary

Lifecycle Planning

Capacity and reliability strategy across multiple hardware refresh cycles.

Operational Headroom

Intentional free-space margin to protect performance and snapshot behavior.

Related Long-Tail Calculators

2x 4TB RAID 1 2x 6TB RAID 1 2x 8TB RAID 1 2x 10TB RAID 1 2x 12TB RAID 1 2x 14TB RAID 1 2x 16TB RAID 1 2x 18TB RAID 1 2x 20TB RAID 1 3x 4TB RAID 1 3x 4TB RAID 5 3x 4TB RAID-Z1 3x 6TB RAID 1 3x 6TB RAID 5 3x 6TB RAID-Z1 3x 8TB RAID 1

FAQ

How should I select between RAID 6 and RAID 5?

Choose based on your risk tolerance, rebuild window, and performance profile. Higher parity usually lowers capacity but improves resilience.

Can two layouts with similar storage headroom still have very different failure exposure?

Yes. Similar usable TB does not imply similar failure tolerance or rebuild exposure. Capacity and resiliency should be evaluated together.

Does RAID 6 rebuild faster than RAID 5?

Rebuild behavior depends on array width, disk size, and workload pressure. This page focuses on capacity and tolerance; benchmark your actual platform before final choice.

Which option is usually better for long-term homelab growth?

The better option is the one that keeps acceptable usable capacity while preserving safety margins during future disk expansions.