@stefanoStefano Marinelli Yes, the error messages at boot really do not matter. But it also did unwanted imports of zpools on other devices, regardless of `zpool.cache`.
If you have a fediverse account, you can quote this note from your own instance. Search https://mastodon.nu/users/KarlPettersson/statuses/114597496117554017 on your instance and quote it. (Note that quoting is not supported in Mastodon.)