> > > my kernel options: ro root=/dev/mapper/vg_nb-lv_root
> > > rd_LVM_LV=vg_nb/lv_root rd_NO_LUKS rd_NO_MD rd_NO_DM
> >
> > You want to use "rd.luks.uuid" kernel option. See "man
> > dracut.kernel".
>
> rd_NO_LUKS (or rd.luks=0) disables LUKS detection
> entirely. I believe this is not about initrd...
>
Sorry, I don't understand you. Your request was "don't mount a
specific encrypted volume during boot", right?
Actually no. ;-) The question was, if I can force systemd
not to mount an encrypted partition. I do not have any other
encrypted partitions, so rd.luks=0 is fine.
However, I already found a resolution. "noauto" was missing
in /etc/crypttab from some reason. My fault that I haven't
double checked. Now it works like a charm.
Thank you Kamil for your answers. :-)
Jan