💾 Homelab Array Telemetry Tool
Unraid Storage & Parity Rebuild Calculator
Sizing mixed-drive Unraid storage arrays, calculating single vs dual parity drive overhead, ZFS NVMe cache pool capacity, and parity check completion times.
⚙️ Array Drive Configuration
Largest Drive (TB)
Drive Count (Same Size)
Secondary Drive (TB)
Drive Count
210 MB/s
Usable Array Storage
128.0 TB
116.4 TiB Formatted
Parity Overhead
36.0 TB
2x 18TB Drives
Est. Parity Sync Time
23.8 Hours
Initial Build / Check
📊 Storage Array Infrastructure Breakdown Calculated Values
Array Parameter Calculated Metric
Total Raw Installed HDD Capacity 164.0 TB
Required Parity Drive Size (Min) ≥ 18.0 TB
Simultaneous Drive Fault Tolerance 2 Drive Failures
Parity Efficiency Ratio 78.0%
Usable Formatted Space (Binary TiB) 116.4 TiB
💡 Unraid Parity Sizing Rules
- Your parity drive MUST be equal to or larger than your largest data drive in the array.
- Dual parity is strongly recommended for arrays exceeding 6 total hard drives to protect against rebuild stress failure.