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10x 16TB RAID 6 NAS Calculator | Usable TB

Estimate usable TB, parity overhead, and fault tolerance for 10x 16TB in RAID 6. Includes reserve planning for NAS and homelab arrays.

Capacity Snapshot

Raw Capacity

160.00 TB

Usable Capacity

115.20 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.

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Alternative Mode Comparison

Mode Usable Tolerance Efficiency
RAID 5 129.60 TB 1 drive 90.0%
RAID 6 115.20 TB 2 drives 80.0%
RAID 10 72.00 TB 1 drive per mirror pair* 50.0%
RAID-Z1 129.60 TB 1 drive 90.0%
RAID-Z2 115.20 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 16TB RAID 5 NAS Calculator | Usable TB Next: 10x 16TB RAID 10 NAS Calculator | Usable TB →

FAQ

Should I optimize this 10-drive plan for capacity 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.

How much usable storage does 10x 16TB RAID 6 provide?

This NAS planning scenario estimates 115.20 TB usable after a 10% reserve from 160.00 TB raw.

Why include a 10% reserve when planning NAS available space?

Keeping free space improves filesystem behavior for snapshots, metadata, and write performance. Full arrays often perform worse and rebuild more slowly.

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.