NAS pSEO Landing
Brand Focus · QNAP
Compare usable TB, parity, and failure tolerance between RAID-Z2 and RAID-Z1 for QNAP NAS users.
This page compares RAID-Z2 and RAID-Z1 on identical hardware assumptions to help homelab builders choose between capacity efficiency and fault tolerance.
| Drives | RAID-Z2 | RAID-Z1 | Delta |
|---|---|---|---|
| 4x 8TB | 14.40 TB | 21.60 TB | -7.20 TB |
| 6x 8TB | 28.80 TB | 36.00 TB | -7.20 TB |
| 8x 8TB | 43.20 TB | 50.40 TB | -7.20 TB |
| 10x 8TB | 57.60 TB | 64.80 TB | -7.20 TB |
| 12x 8TB | 72.00 TB | 79.20 TB | -7.20 TB |
QNAP buyers often compare capacity efficiency against service consolidation needs, where VM storage, containers, and media serving all compete for IOPS and free space.
QNAP auto-tiering system that moves hot and cold data across storage classes.
QTS module for RAID pool management, volume control, and snapshots.
Allocates logical space first and consumes physical capacity over time.
Yes. The comparison table applies a 10% reserve baseline to reflect realistic operating headroom in NAS and homelab environments.
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.
Choose based on your risk tolerance, rebuild window, and performance profile. Higher parity usually lowers capacity but improves resilience.
The better option is the one that keeps acceptable usable capacity while preserving safety margins during future disk expansions.