Alan Mackenzie 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
