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QNAP RAID 10 vs RAID 5 Storage Calculator

Compare usable capacity, fault tolerance, and efficiency between RAID 10 and RAID 5 for QNAP NAS users.

Comparison Notes

This page compares RAID 10 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 10 RAID 5 Delta
4x 8TB 14.40 TB 21.60 TB -7.20 TB
6x 8TB 21.60 TB 36.00 TB -14.40 TB
8x 8TB 28.80 TB 50.40 TB -21.60 TB
10x 8TB 36.00 TB 64.80 TB -28.80 TB
12x 8TB 43.20 TB 79.20 TB -36.00 TB

QNAP Planning Notes

QNAP buyers often compare capacity efficiency against service consolidation needs, where VM storage, containers, and media serving all compete for IOPS and free space.

Brand / Region Glossary

Qtier

QNAP auto-tiering system that moves hot and cold data across storage classes.

Storage & Snapshots

QTS module for RAID pool management, volume control, and snapshots.

Thin Provisioning

Allocates logical space first and consumes physical capacity over time.

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 10 and RAID 5?

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

Which has more usable storage headroom: RAID 10 or RAID 5?

For QNAP users, this NAS planning scenario compares both modes at fixed drive sizes so you can see usable capacity differences before buying disks.

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.

Can two layouts with similar capacity still have very different risk?

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