NAS pSEO Landing
Region Focus · US
Compare usable TB, parity, and failure tolerance between RAID-Z3 and RAID-Z2 for US 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 |
US buyers often evaluate frequent pricing swings and promo cycles. Capacity planning should account for staged purchases instead of one-time all-disk upgrades.
Planning metric that compares real usable capacity after reserve and parity.
Seasonal pricing period used for phased drive purchasing strategies.
Choose based on your risk tolerance, rebuild window, and performance profile. Higher parity usually lowers capacity but improves resilience.
Yes. Similar usable TB does not imply similar failure tolerance or rebuild exposure. Capacity and resiliency should be evaluated together.
Yes. The comparison table applies a 10% reserve baseline to reflect realistic operating headroom in NAS and homelab environments.
For US homelab buyers, this NAS planning scenario compares both modes at fixed drive sizes so you can see usable capacity differences before buying disks.