I wonder, would you need to do this with clean install? In another words, is there an option to setup your disks the way you want it in the installer?
I am just asking because I am not that familiar with Ubuntu, but I am used to be able to do this sort of thing in rpm based distros. Thanks, T On Mon, Jun 8, 2020, 14:41 Russell Senior <[email protected]> wrote: > On one of my desktop machines, I decided it was time to update to 20.04 > from 16.04. The installation is on a RAID1 with LVM2 on top. The initial > update to 18.04 went smoothly using do-release-upgrade. The second upgrade > to 20.04 choked though. A couple additional complications are that I have > my /home mounted from NFS, but that won't enter in to the problematic bits > here. > > When I encountered the hitch in the update to 20.04 (some package conflict > that was never very clear), I thought "okay, fine, my homedir is safely on > NFS, the only other non-package files are on another logical volume, I'll > just update the rootfs from the installer. > > Pretty quick, I was refamiliarized with the fact that Ubuntu's installer > doesn't think RAID on the desktop is a thing. And, since it's been most of > 4 years since I did the 16,04 install, I'd forgotten how I'd worked around > this before. > > Turns out, it isn't terribly difficult. The basic thumbnail sketch is as > follows: > > install mdadm in the live-boot environment; > sudo mdadm --assemble --scan (to detect the existing RAID array); > the installer will now happily detect the LVM volume groups and logical > volumes; > don't reboot yet! > the installed system doesn't have mdadm yet and its initramfs needs > rebuilding; so > chroot to the installed rootfs with the various virtual filesystems > mounted; > apt install mdadm; > put at least raid1 (I threw in lvm2 as well, but not sure that's > required) in /etc/initramfs-tools/modules; > update-initramfs; > update-grub; > exit chroot; > okay, now reboot. > > If you forgot something, you can return to the live-boot'd thumbdrive and > retry the chroot. > > Hope this helps someone, even if the someone is me in another 4 years. > > -- > Russell Senior > [email protected] > _______________________________________________ > PLUG mailing list > [email protected] > http://lists.pdxlinux.org/mailman/listinfo/plug > _______________________________________________ PLUG mailing list [email protected] http://lists.pdxlinux.org/mailman/listinfo/plug
