Since mid 2021 we have had many new users of TrueNAS wanting to try SCALE. Here are some things that are helpful for new TrueNAS SCALE users to know;
- TrueNAS SCALE is based on Linux, while TrueNAS Core uses FreeBSD, and uses different user land packages
- Both SCALE & Core only use ZFS for data storage. If you are looking for something disk compatible with MS-Windows, look elsewhere. (But network accessible from MS-Windows is a fully supported feature.)
- SCALE is a specialized & targeted OS based on Linux, so installing additional packages on the base OS will likely lead to frustration as they will disappear during an update
- TrueNAS, both SCALE & Core, use dedicated boot devices:
I have to waste an entire drive just for booting?With the advent of TrueNAS Scale, we seem to be getting a large number of people from the Linux community who are not quite grasping what TrueNAS is. TrueNAS is not a "Linux distro" and it is not designed to try to meet your arbitrarily spec'd...www.truenas.com
- SCALE is still under development, so some features may not be complete or fully functional
- Users with questions or in need of support for TrueCharts should perform basic research on the website;
Join the TrueCharts Discord Server!Check out the TrueCharts community on Discord - hang out with 6,358 other members and enjoy free voice and text chat.discord.com
- With SCALE based on Linux, the ZFS ARC, (Adaptive Read Cache), will act differently than on Core, (which is based on FreeBSD).
- Just because SCALE is based on Linux, random / recycled / old hardware may not work faster or more reliable than Core. A good NAS server will want to be reliable & protect your data, which random, recycled or old hardware may not do.
- SCALE is not an upgrade from Core, they are similar products with slightly different feature sets
- Core will likely be a bit more stable than SCALE, due to difference in kernel development procedures. Further, Core has had many years of work to make it stable, reliable & fast, where SCALE is a spring chicken by comparison.
- TrueNAS does not support sharing storage devices between vDevs or pools, except spares.
- YouTube is generally entertainment, so take any ZFS or TrueNAS videos with a lump of salt. But, running a production NAS server is generally not entertainment, even if it is for your home.
- ZFS pool & datasets are different enough, that unless you know the basics, you can make some serious mistakes. Some mistakes will require a full backup and restore to remedy. See this helpful guide:
ZFS Storage Pool LayoutThis amazing document, created by iX System in February 2022 as a "White Paper", cleanly explains how to qualify pool performance touching briefly on how ZFS stores data and presents the advantages, performance and disadvantages of each pool...www.truenas.com
- Why did you select SCALE & ZFS?
Just because others show it is easy, does not mean it will be easy, and appropriate for you. Here is a helpful introduction to ZFS:
Introduction to ZFSThis is a short introduction to ZFS. It is really only intended to convey the bare minimum knowledge needed to start diving into ZFS and is in no way meant to cut Michael W. Lucas' and Allan Jude's book income. It is a bit of a spiritual...www.truenas.com
- Just because "it works" after install does not mean that your TrueNAS SCALE server will be reliable in the long run. Or even in the short run. A properly designed, configured and parted out NAS server will generally be reliable. But, many people throw parts together and assume they are suitable. Which may not be the case.