> I found this [1], quoting: "I'd also like to share an issue I've > discovered: if /boot's partition is a LV, then there must not be a > raidintegrity LV anywhere before that LV inside the same VG. Otherwise, > update-grub will show an error (disk `lvmid/.../...' not found) and GRUB > cannot boot. So it's best if you put /boot into its own VG. (PS: Errors > like unknown node '..._rimage_0 can be ignored.)"
Hmm... I've been using a "plain old partition" for /boot (with everything else in LVM) for "ever", originally because the boot loader was not able to read LVM, and later out of habit. I was thinking of finally moving /boot into an LV to make things simpler, but I see that it'd still be playing with fire (AFAICT booting off of LVM was still not supported by U-Boot either last time I checked). 🙁 Stefan