EU RAID 10 vs RAID 6 Calculator

Compare usable TB, parity, and failure tolerance between RAID 10 and RAID 6 for EU homelab setups.

Planning route

Answer the capacity question, then validate the purchase path

Use this worked example as a numeric starting point, then validate the RAID choice, capacity reserve, hardware plan, and backup path.

Decision aid RAID level selector Reference Capacity matrix

Editorial method

What this calculator can—and cannot—decide

The capacity model makes drive count, drive size, RAID layout, and reserve visible. It is a planning aid: it does not predict exact performance, rebuild duration, hardware compatibility, or the probability of data loss for a specific system.

Last reviewed: July 10, 2026. Product links remain neutral category searches until a partner relationship and page-level disclosure are in place.

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Comparison Notes

This page compares RAID 10 and RAID 6 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

Open Interactive Planner →

Storage Capacity Table

Drives	RAID 10	RAID 6	Delta
4x 8TB	14.40 TB	14.40 TB	+0.00 TB
6x 8TB	21.60 TB	28.80 TB	-7.20 TB
8x 8TB	28.80 TB	43.20 TB	-14.40 TB
10x 8TB	36.00 TB	57.60 TB	-21.60 TB
12x 8TB	43.20 TB	72.00 TB	-28.80 TB

EU Buyer Context

EU deployments often place additional emphasis on energy efficiency and predictable lifecycle upgrades, especially for always-on NAS fleets.

• Choose a layout that minimizes emergency rebuild risk under continuous operation.
• Prefer capacity plans that survive one upgrade cycle without pool redesign.

Brand / Region Glossary

Lifecycle Planning

Capacity and reliability strategy across multiple hardware refresh cycles.

Operational Headroom

Intentional free-space margin to protect performance and snapshot behavior.

NAS cluster navigation

Move through the storage decision path

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NAS Hub Calculator and buying path Learning Center 8-step guide path RAID Comparison Mode-by-mode matrix RAID Selector Choose by priority Capacity Matrix Citation-ready reference NAS FAQ Planning answers

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Sequential long-tail navigation

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FAQ

Can two layouts with similar storage headroom still have very different failure exposure?

Yes. Similar usable TB does not imply similar failure tolerance or rebuild exposure. Capacity and resiliency should be evaluated together.

How should I pick between RAID 10 and RAID 6?

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

Which has more effective capacity: RAID 10 or RAID 6?

For EU homelab buyers, this NAS planning scenario compares both modes at fixed drive sizes so you can see usable capacity differences before buying disks.

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.