Unraid RAID 0 vs RAID 10 Calculator

Compare usable TB, parity, and failure tolerance between RAID 0 and RAID 10 for Unraid NAS users.

Comparison Notes

This page compares RAID 0 and RAID 10 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

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Storage Capacity Table

Drives	RAID 0	RAID 10	Delta
4x 8TB	28.80 TB	14.40 TB	+14.40 TB
6x 8TB	43.20 TB	21.60 TB	+21.60 TB
8x 8TB	57.60 TB	28.80 TB	+28.80 TB
10x 8TB	72.00 TB	36.00 TB	+36.00 TB
12x 8TB	86.40 TB	43.20 TB	+43.20 TB

Unraid Planning Notes

Unraid users often optimize for incremental growth and flexible disk replacement, where parity planning and usable capacity targets evolve over time rather than all at once.

• Capacity plans should include phased drive upgrades, not only day-one layout.
• Use parity-protected growth steps to avoid risky bulk migrations.
• Track cache and parity pressure separately from archive data growth.

Brand / Region Glossary

Parity Disk

Dedicated parity disk(s) protecting data disks in the Unraid array model.

Cache Pool

Fast SSD/NVMe pool used for writes and application workloads.

Mover

Scheduled process that migrates data between cache and array tiers.

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

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FAQ

How should I select between RAID 0 and RAID 10?

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

Does RAID 0 rebuild faster than RAID 10?

Rebuild behavior depends on array width, disk size, and workload pressure. This page focuses on capacity and tolerance; benchmark your actual platform before final choice.

Does this comparison include filesystem reserve?

Yes. The comparison table applies a 10% reserve baseline to reflect realistic operating headroom in NAS and homelab environments.

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.