Hello,
I have watched some videos on Youtube about the TrueNas Core Installation process and it seems all pretty much straightforward. I am a bit surprised that the disk containing the operating system and the application is not automatically mirrored. Is there any way to do a RAID1 for the boot disk - this is exactly what I am doing for Proxmox with ZFS - or will I have to use an old fashioned hardware-raid for the boot drives and configure the other drives as jbod?
Yours sincerely
Stefan
You can mirror the boot pool.
Great, thanks for the pointer. Can I do this with the regular stable build or do I need what stands at the top of the line of documentation you sent me: TrueNAS CORE Nightly Development Documentation, meaning a potentially unstable nightly build.
Yours
Stefan
You can do this with stable builds of CORE/SCALE.
For some reason the documentation defaults to nightly, but the process is the same.
You’ve been able to do this for nearly 10 years, since the release of FreeNAS 9.3.
Except back then a 3-way mirror was possible and sadly that is no longer the case. 2-way is the max allowable per the current SCALE and CORE GUIs.
There are better HA solutions available than a 2-way mirror but it would have been nice to be able to create boot-ready copies of the current config on a USB stick for disaster preparedness (ie off-site storage).
If you’re looking at a doc that doesn’t match your installed version, you can always use the version selector on the page to switch to the correct version.
That’s becuase the boot drive is essentially disposable: Just keep a recent copy of the configuration file out of the NAS and you’re ready to replace the boot drive in the time it takes for the installer to do its stuff…
If you do want a highly resilient boot, look into the old forum for the resource on mixing hardware RAID and ZFS mirror to get that. It’s great reading just for the intricacies of getting a BIOS to understand that there is an alternative boot device available…
And you can do it at time of install, or after the fact, and you can undo it too.
Pity you can’t do 3-way anymore. (Not even using CLI)
