0

I have an Ubuntu upgrade that ended up not working -- 19.04 to 19.10 (see post for more info).

Now I need to mount my root image to edit files on it, and rebuild Grub, in the hopes of getting it back.

However, I am uncertain how to properly mount the image. My root image is mirrored on two separate PV's.

Running sudo fdisk -l | grep /dev/ I'm getting:

(Note: I used ... to abbreviate parts of the output.)

Disk /dev/loop0: ... sectors
Disk /dev/loop1: ... sectors
  ...
Disk /dev/sda: ... sectors
     /dev/sda1 ... 930.7G Linux LVM
     /dev/sda2 ...   800M Linux
Disk /dev/sdb: ... sectors
     /dev/sdb1 ... 465.8G Linux LVM
Disk /dev/mapper/ubuntu--vg-root_mlog: 4 MiB ... sectors
Disk /dev/mapper/ubuntu--vg-root_mimage_0: 214 GiB ... sectors
Disk /dev/mapper/ubuntu--vg-root_mimage_1: 214 GiB ... sectors
Disk /dev/mapper/ubuntu--vg-root: 214 GiB ... sectors
  ...

Should I be using /dev/mapper/ubuntu--vg-root to mount my root image so that the mirror stays intact?

1

Should I be using /dev/mapper/ubuntu--vg-root to mount my root image so that the mirror stays intact?

Yes sir.

It looks like, even if quite broken, your system launched the LVM stuff and your PV/VG/LV has been correctly detected. So just mounting your LV will work and keep your mirror synchronized.

Your Answer

By clicking “Post Your Answer”, you agree to our terms of service, privacy policy and cookie policy

Not the answer you're looking for? Browse other questions tagged or ask your own question.