NAS pSEO Landing
Region Focus · US
Estimate usable TB, parity, and fault tolerance for US homelab buyers using 8x 12TB in RAID 5.
Raw Capacity
96.00 TB
Usable Capacity
75.60 TB
Fault Tolerance
1 drive
Efficiency
87.5%
Balanced capacity and redundancy, but rebuild stress can be high on large disks. This scenario applies a 10% filesystem reserve.
Run Interactive Calculator →| Mode | Usable | Tolerance | Efficiency |
|---|---|---|---|
| RAID 5 | 75.60 TB | 1 drive | 87.5% |
| RAID 6 | 64.80 TB | 2 drives | 75.0% |
| RAID 10 | 43.20 TB | 1 drive per mirror pair* | 50.0% |
| RAID-Z1 | 75.60 TB | 1 drive | 87.5% |
| RAID-Z2 | 64.80 TB | 2 drives | 75.0% |
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.
For US homelab buyers, this NAS planning scenario estimates 75.60 TB usable after a 10% reserve from 96.00 TB raw.
Keeping free space improves filesystem behavior for snapshots, metadata, and write performance. Full arrays often perform worse and rebuild more slowly.
It can be practical, but larger drives increase rebuild windows. Validate parity choice and backup policy before committing to the final layout.
This setup can tolerate 1 drive. Real-world survivability depends on mirror placement, rebuild stress, and drive health.