Deleting Boot Environment(s)

[GChuck]

How long should you keep previous boot environments for or should you just keep them all?

I have had the occasion to revert back to a previous environment twice now since I have been running Free/TruNAS, but have kept all previous environments, going back to "initial-install" and "default".

Should the old environments be deleted?

Thanks.

Greg

 

[Samuel Tai]

There's no need to keep boot environments you can't return to. For example, once you've upgraded from 11.3 to 12.0, and upgraded ZFS feature flags, it's not possible to return to 11.3.

 

[blanchet]

I keep only the last 3 boot environments and I avoid upgrading the ZFS features flags to be able to revert back to a previous version of TrueNAS.

 

[GChuck]

Thanks Samuel, that's what I thought.

However, what about the "default" and "initial-install" environments. Do you eventually delete those as well?

 

[Samuel Tai]

Yes, I deleted both those boot environments. I only run with at most 2 boot environments: the current and the immediately previous versions.