NAS pSEO Landing
Region Focus · EU
Compare usable TB, parity, and failure tolerance between RAID-Z3 and RAID-Z2 for EU homelab setups.
This page compares RAID-Z3 and RAID-Z2 on identical hardware assumptions to help homelab builders choose between capacity efficiency and fault tolerance.
| Drives | RAID-Z3 | RAID-Z2 | Delta |
|---|---|---|---|
| 4x 8TB | N/A | 14.40 TB | N/A |
| 6x 8TB | 21.60 TB | 28.80 TB | -7.20 TB |
| 8x 8TB | 36.00 TB | 43.20 TB | -7.20 TB |
| 10x 8TB | 50.40 TB | 57.60 TB | -7.20 TB |
| 12x 8TB | 64.80 TB | 72.00 TB | -7.20 TB |
EU deployments often place additional emphasis on energy efficiency and predictable lifecycle upgrades, especially for always-on NAS fleets.
Capacity and reliability strategy across multiple hardware refresh cycles.
Intentional free-space margin to protect performance and snapshot behavior.
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.
The better option is the one that keeps acceptable usable capacity while preserving safety margins during future disk expansions.
Choose based on your risk tolerance, rebuild window, and performance profile. Higher parity usually lowers capacity but improves resilience.
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.