UK 6x 8TB RAID 10 NAS Calculator

Estimate usable TB, parity, and fault tolerance for UK homelab buyers using 6x 8TB in RAID 10.

Capacity Snapshot

Raw Capacity

48.00 TB

Usable Capacity

21.60 TB

Fault Tolerance

1 drive per mirror pair*

Efficiency

50.0%

Excellent random I/O and rebuild behavior; capacity is typically 50% of raw. This scenario applies a 10% filesystem reserve.

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Alternative Mode Comparison

Mode	Usable	Tolerance	Efficiency
RAID 5	36.00 TB	1 drive	83.3%
RAID 6	28.80 TB	2 drives	66.7%
RAID 10	21.60 TB	1 drive per mirror pair*	50.0%
RAID-Z1	36.00 TB	1 drive	83.3%
RAID-Z2	28.80 TB	2 drives	66.7%

UK Buyer Context

UK homelab planners commonly balance higher per-drive pricing with power and chassis constraints, so efficient but resilient layouts become more valuable.

• Model dual-parity options early if rebuild time is a concern.
• Include reserve headroom to avoid running pools at high fill percentages.

Brand / Region Glossary

Power Budget

Expected always-on energy usage cost factored into NAS layout decisions.

Rebuild Window

Estimated time exposure while replacing a failed drive and restoring parity.

NAS Cluster Guides

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

Related Long-Tail Calculators

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Sequential Long-Tail Navigation

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FAQ

How much real-world usable storage does 6x 8TB RAID 10 provide?

For UK homelab buyers, this NAS planning scenario estimates 21.60 TB usable after a 10% reserve from 48.00 TB raw.

How many disk failures can RAID 10 tolerate in this setup?

This setup can tolerate 1 drive per mirror pair*. Real-world survivability depends on mirror placement, rebuild stress, and drive health.

Should I optimize this 6-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.

Is RAID 10 still practical with 8TB drives?

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