← NAS & RAID Calculator

NAS pSEO Landing

3x 14TB RAID 1 NAS Calculator | Usable TB

Estimate usable TB, parity overhead, and fault tolerance for 3x 14TB in RAID 1. Includes reserve planning for NAS and homelab arrays.

Capacity Snapshot

Raw Capacity

42.00 TB

Usable Capacity

12.60 TB

Fault Tolerance

2 drives*

Efficiency

33.3%

Strong redundancy but low capacity efficiency. Great for small, critical datasets. This scenario applies a 10% filesystem reserve.

Run Interactive Calculator →

Alternative Mode Comparison

Mode Usable Tolerance Efficiency
RAID 5 25.20 TB 1 drive 66.7%
RAID 6 N/A N/A N/A
RAID 10 N/A N/A N/A
RAID-Z1 25.20 TB 1 drive 66.7%
RAID-Z2 N/A N/A N/A

NAS Cluster Guides

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

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

Sequential Long-Tail Navigation

← Previous: 3x 12TB RAID-Z1 NAS Calculator | Usable TB Next: 3x 14TB RAID 5 NAS Calculator | Usable TB →

FAQ

How many disk failures can RAID 1 tolerate in this setup?

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

Is RAID 1 still viable with 14TB drives?

It can be practical, but larger drives increase rebuild windows. Validate parity choice and backup policy before committing to the final layout.

How much real-world usable storage does 3x 14TB RAID 1 provide?

This NAS planning scenario estimates 12.60 TB usable after a 10% reserve from 42.00 TB raw.

Should I optimize this 3-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.