split-usr vs. merged -- which do I need?

[mgnut57]

I recently ran into the need to update profiles from 17 to 23. However, which profile to select?

How can I tell if I should use a split-usr or one of the merged profiles. On one machine, I think I selected the wrong one and it resulted in bash failing to run with "input/output error" or something similar. Fortunately, I was able to boot from a USB and recover from backups.

I have one more machine to upgrade. I suspect that it should be split-usr, but how can I be sure?

[pietinger]

It is very easy:

All 17.1 profiles that did not have a "merged-usr" in their name were (invisibly) a "split-usr" profile.

With 23.0 profiles it is exactly the other way around: Everything that does not have a "split-usr" in its name is a (invisible) "merged-usr" profile.

For example, if you had a 17.1 desktop profile (without explicit merged-usr), you now need the [46] default/linux/amd64/23.0/split-usr/desktop (stable).

If you previously had a 17.1/desktop/systemd/merged-usr you now need a 23.0/desktop/systemd (stable).

If you are now on a 23.0 split-usr profile and want to switch to a 23.0 merged-usr profile, you can do this AFTER your switch from 17.1 to 23.0:
https://wiki.gentoo.org/wiki/Merge-usr
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https://wiki.gentoo.org/wiki/User:Pietinger

[mgnut57]

[logrusx]