As the title says, I've installed LFS sucessfully on VirtualBox, with all system partitions on a separate virtual HDD, and it's booting OK. However, whenever I detach the host system's HDD (A CentOS 8 installation), I can't boot on LFS anymore, so I figured it was because I didn't populate my LFS-HDD's /boot partition with the GRUB code and the kernel, and was instead using the host's, so I fell back and installed the kernel and the bootloader on LFS's HDD /boot partition. And again, once I detached the host HDD, I couldn't boot into LFS anymore. I figured that if there was something missing in the other partition, I could just copy it to my partition of interest and problem solved, so I copied the whole /boot partition content from the host to LFS-HDD, and again tried to boot into LFS without the host HDD attached, and still no good. So here's where I ran out of ideas. What I want is a completely independent LFS system, with only LFS HDD attached, and no dependence on the host OS HDD whatsoever. I'd kindly appreciate any help. Thanks in advance!
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grub-installto install the boot loader on your LFS drive, note that installing the grub boot loader is different than populating/boot. linuxfromscratch.org/lfs/view/stable/chapter10/grub.html Where it saysgrub-install /dev/sda... sda needs to be changed to the LFS drive. Also note that when you detach the CentOS drive, your LFS drive may now be(hd0)which needs to be reflected in/boot/grub/grub.cfgandsdawhich needs to be reflected in/etc/fstab. – rfmodulator Jan 5 at 16:37/etc/fstabwith no result, as well as doinggrub-installon LFS-HDD. Let me try again anyways and I'll report back. – Daniel Casañas Jan 5 at 22:25