Alan Mackenzie <a...@muc.de> writes: > My system isn't booting. In particular, most of the SSD partitions > won't mount, because they are not under /dev any more. The root > partition, /dev/md125 mounts, but that is all. > > These partitions are lvm partitions under RAID-1 (software RAID). They > simply fail to appear in /dev/mapper on boot up. > > I've managed to bring my system up using a Rescue-DVD followed by > chroot. This shows that the partions on the SSD are basically > undamaged. > > I strongly suspect that my emerge update from last night is to blame.
It was. Been there, done that myself. Mount your filesystems from the rescue boot and chroot into them. Re-emerge lvm2 with the "lvm" flag enabled. See https://www.gentoo.org/support/news-items/2022-11-19-lvm2-default-USE-flags.html Some of these commands (or similar) in the rescue boot might be helpful: mkdir -p /mnt/{usr,var,home,work,boot,dev,sys,proc} mount /dev/mapper/vg0-root /mnt mount /dev/mapper/vg0-usr /mnt/usr mount /dev/mapper/vg0-var /mnt/var mount /dev/mapper/vg1-home /mnt/home mount /dev/mapper/vg1-work /mnt/work mount /dev/sda1 /mnt/boot mount -o bind /dev /mnt/dev mount -o bind /dev/pts /mnt/dev/pts mount -o bind /dev/shm /mnt/dev/shm mount -o bind /sys /mnt/sys mount -o bind /proc /mnt/proc PATH=/bin:/sbin:/usr/bin:/usr/sbin \ SHELL=/bin/bash \ chroot /mnt -- Alan J. Wylie https://www.wylie.me.uk/ Dance like no-one's watching. / Encrypt like everyone is. Security is inversely proportional to convenience
