ZFS Capacity Calculator
2 minute read.
Use this calculator to plan your TrueNAS storage configuration before creating pools. Enter your total disk count and compare different RAID types to see usable capacity after accounting for redundancy and ZFS overhead.
- RAIDZ1: Good capacity efficiency, single-disk fault tolerance.
- RAIDZ2: Balanced capacity and redundancy, double-disk fault tolerance.
- Mirror: Best performance, 50% capacity efficiency.
- dRAID: For storage arrays with numerous attached disks (>100) where greatly reduced resilver time is needed.
The calculator also shows TrueNAS Enterprise hardware requirements and expansion shelf planning.
Click the help icons (?) for detailed explanations of each setting.
For more background on ZFS concepts, see the ZFS Primer.
Configuration Help: Click the help icons (?) next to field labels above to see detailed explanations of each setting. Loading TrueNAS shelf calculations... | |||
Select a tab to view calculated data for different ZFS configurations. Hovering over a table cell loads the relevant data into the Calculation Values section below. You can click table cells to freeze or unfreeze those values.
Calculation Values
(Click table cells above to freeze/unfreeze)
ZFS Capacity Calculator originally created by Jason Rose.