TrueNAS SCALE and Unraid are the two main contenders in the DIY NAS landscape.
- FileSystem & Array Design: TrueNAS relies entirely on ZFS (requiring significant RAM, a minimum of 16GB–32GB ECC, and rigid VDEV configurations). Unraid utilizes a flexible main array system while still supporting native ZFS pools for high-speed cache pools.
- Expandability: Unraid allows users to add individual drives of any capacity at any time. TrueNAS requires expansion via matching sets of drives (VDEVs).
- Read/Write Performance: TrueNAS excels in random write speeds and multi-user environments due to ZFS striping. Unraid relies on SSD Caching to achieve comparable write performance.
Verdict: Unraid is ideal for home users prioritizing flexible storage expansion; TrueNAS suits enterprise environments requiring raw throughput.
