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10x 6TB RAID 6 NAS Calculator | Usable TB

Estimate usable TB, parity overhead, and fault tolerance for 10x 6TB in RAID 6. Includes reserve planning for NAS and homelab arrays.

Capacity Snapshot

Raw Capacity

60.00 TB

Usable Capacity

43.20 TB

Fault Tolerance

2 drives

Efficiency

80.0%

Safer for larger arrays with dual parity, at the cost of one extra parity disk. This scenario applies a 10% filesystem reserve.

Run Interactive Calculator →

Alternative Mode Comparison

Mode Usable Tolerance Efficiency
RAID 5 48.60 TB 1 drive 90.0%
RAID 6 43.20 TB 2 drives 80.0%
RAID 10 27.00 TB 1 drive per mirror pair* 50.0%
RAID-Z1 48.60 TB 1 drive 90.0%
RAID-Z2 43.20 TB 2 drives 80.0%

NAS Cluster Guides

NAS Hub RAID Level Compare RAID Capacity Matrix Planning Quick Sheet RAID Selector NAS FAQ

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Sequential Long-Tail Navigation

← Previous: 10x 6TB RAID 5 NAS Calculator | Usable TB Next: 10x 6TB RAID 10 NAS Calculator | Usable TB →

FAQ

How many disk failures can RAID 6 tolerate in this setup?

This setup can tolerate 2 drives. Real-world survivability depends on mirror placement, rebuild stress, and drive health.

Should I optimize this 10-drive plan for storage headroom or resiliency first?

For long-lived NAS pools, resiliency first is usually safer. Capacity can be expanded later, while a risky parity choice can force migration sooner.

Can this calculator replace real-world benchmark and rebuild testing?

No. Use this page for pre-purchase sizing, then validate with workload benchmarks, SMART health policy, and a tested restore plan.

How much effective storage does 10x 6TB RAID 6 provide?

This NAS planning scenario estimates 43.20 TB usable after a 10% reserve from 60.00 TB raw.