Re: System won't boot anymore after upgrade to jessie

[deloptes <deloptes@gmail.com>]

Elisabetta Falivene wrote:

> It wasn't me to configure the machine in the first place so is a bit
> tricky. I can give more information if you can point me out what you could
> need. thank you a lot

well it is interesting to know if you have raid or so, if your boot and root
are on LVM, or probably only root is on lvm.

Perhaps it will be sufficient to pass root parameter to the kernel

the process to fix initrd is not that complicated

1. boot from rescue media usb like ubuntu
2. become root (sudo bash)
3. vgscan
4. vgchange -ay <volume group>
5. mount root and boot somewhere ex. /mnt/root and /mnt/root/boot (if boot
is separate partition)

6. prepare to chroot
mount --bind /dev  /mnt/root/dev
mount --bind /dev/pts  /mnt/root/dev/pts
mount --bind /proc  /mnt/root/proc
mount --bind /sys  /mnt/root/sys

7. chroot  /mnt/root

now you can fix initrd

example

update-initramfs -u -k `uname -r`

8. update-grub (not really needed, but to be on the safe side)

9. reboot

In addition

7.1 if you need to examine initrd

        cd /tmp/
        mkdir test
        cd test/
        zcat /boot/initrd.img-<version> | cpio -id

        do whatever you need to do

        find . ! -name *~ | cpio -H newc --create | gzip -9
> /boot/initrd.img-<version>


perhaps test this process in VM to get familiar with it before doing this on
production system

IMO it will be solved if you recreate initrd from the chroot environment, if
not see what you have in the initrd ... but perhaps someone else will do
this


regards