TrueNAS CORE and SCALE is known as a [[Best Operating Systems for Home Lab, Server, and NAS Setups]] that uses [[ZFS (Zettabyte File System)]], and the latter is apparently more helpful with the [[3-2-1-1-0 Backup Strategy​]] and running [[Docker]] (see [[VMs vs Containers]]). While TrueNAS provides an OS-like environment for end-users, it is technically a **layered solution** on top of an existing OS kernel (FreeBSD for CORE or Linux for SCALE). As of November 2024, IX Systems decided that with the upcoming Electric Eel TrueNAS Scale update (24.10) to switch the application backend to Docker and remove Kubernetes. As of November 27, 2024, **TrueNAS SCALE** supports adding drives to an existing RAIDZ vdev through a feature known as **RAIDZ Expansion**. This functionality allows users to incrementally increase storage capacity by adding one or more drives to an existing RAIDZ vdev. https://jro.io/truenas/ https://www.truenas.com/docs/scale/gettingstarted/ https://www.truenas.com/docs/scale/gettingstarted/install/installprephomeusers6/8 https://www.youtube.com/watch?v=iCZoj2w4vb4 set up a VPN