i will pin it down tomorrow.
Update: columns not showing on the Intel iMac on 15.2
ok, from this I conclude that this is not a problem with my server and at least I don't need to reinstall the system again
Agree. Although sometimes when issues arise, it is a good way to make sure the System is not causing it. A "reinstall" from recovery mode take an hour or so, and does not touch any third party installs or system settings. So its safe.
some updates
i checked about a dozen new computers including out of the box with the sequoia 15.2 system, these two columns are missing, so this is definitely a bug
second...since the update to the 15.2 system, my server has not made a single kernel panic yet
at the same time, I received an email from owc about the solution to the problem with thunderbolt 3 enclosers and sata drives in this version of the system, although the problem concerns iMacs pro 2019, but in my case it looks exactly like this
I agree.
the alert was for Thunderbolt 2 enclosures, however. We have been trying to replicate your (and one other customers) setup to no avail so far.

