Yes, if the option cannot be changed on remount you need to pass it to initrd. By default dracut is using current options from /proc/self/mountinfo and stores in initrd which is why changing /etc/fstab and running mkinitrd has no effect. Arguably it is not the best default and violates principle of the least surprise You can
a) boot using rootflags=... kernel option and then run mkinitrd to store current options in initrd b) run directly "dracut --fstab ..." to regenerate initrd so it (see "man dracut" for full list of options). "dracut --fstab -f" should recreate initrd for the currently running kernel.
Thanks for the explanation. I found an entr in /etc/default/grub with "rootflags=" which seems to cause this confusion :) Regards Daniel -- Daniel Spannbauer Systemadministration marco Systemanalyse und Entwicklung GmbH Tel +49 8333 9233-27 Fax -11 Rechbergstr. 4-6, D 87727 Babenhausen Mobil +49 171 4033220 https://www.marco.de Email ds@marco.de Geschäftsführer Martin Reuter, Torsten Lukas HRB 171775 Amtsgericht München