Finally I did it! Yes! I had other problems but I was able to solve all of them. I will just describe what I did. First I used the Pkgfile for building dracut. Then I used it to generate the mkiniramfs. Because I don't use so often a chroot environment, I didn't understand at first why dracut was not able to build the lvm module in the initramfs. It was because lvm was provided by the iso, but I had not installed it in the mount partition. So after the setup-chroot the lvm command was not found. I solved it by also installing it. I edited the file dracut.conf with the following line: # Bring up <device> in initramfs, <device> should be the device name add_device+=" /dev/mapper/lvolroot /dev/mapper/lvolswap /dev/mapper/hdvg-lvolhome " Those directories are my root partition, swap and home. To build the initramfs: # dracut --add-fstab /etc/fstab I'm not sure if that option is necessary. I have then installed the lilo bootloader. At the beginning because I had a lot of problems I installed several times lilo. I happened that lilo could not install because the kernel was too big (I don't remember exactly the exact error message). No idea why, after a reboot, it worked without a problem. After the reboot I got an error like: "VFS: cannot open root device "fe00" or unknown. Please append a correct "root = " boot option. Kernel Panic - not syncing: VFS unable to mount root fs." My first kernel panic after many years without, a pleasure! Perhaps James gave me the answer:
Dracut should work out of box but very important you append kernel command line to lilo.conf. Dracut will show you what it finds using dracut --print-cmdline (I think)
It was indeed the solution. I had the option for lilo: root=/dev/mvg/lvolroot but it didn't work. It's necessary to give it with the "append" parameter: append="ro root=/dev/mvg/lvolroot" I use syslinux as bootloader, so for me I didn't think to use the "append" parameter. After that I was able to boot. Thank you for your help! Now I can discover crux! Regards, Cédric