Public bug reported:
Distributor ID: Ubuntu
Description: Ubuntu 12.04 LTS
Release: 12.04
Codename: precise
Kernel: 3.2.0-23-generic-pae
Bit width: 32 bits
An example explains best what happens.
Backgroud:
=========
A disk was replaced with a bigger one. Partition copied from original disk to
new one using Gparted. UUID replaced on new disk and fstab updated. Boot flag
set on for the new disk. New disk will be "sda" and old one "sdb" i.e. both
disks available at the same time.
Grub installation:
=============
sudo blkid
/dev/sda1: UUID="9a2e67e5-0583-4901-a523-61a8c75f4296" TYPE="ext4"
/dev/sda5: UUID="16e86b9b-0f88-4dcf-89f8-d3413f9b79a9" TYPE="ext4"
/dev/sda6: UUID="24d4a0ec-c204-42e3-8bb8-cafc99b7d619" TYPE="swap"
/dev/sdb1: UUID="06a2d171-44f3-4898-8bba-cd639070d2c3" TYPE="ext4"
/dev/sdb5: UUID="168b97ba-49e7-4923-afe6-f7c72539978e" TYPE="swap"
sudo mount /dev/sda1 /mnt
sudo grub-install --boot-directory=/mnt/boot /dev/sda
Result:
=====
Boot from "sda" fails since grub still using UUID of old disk "sdb1"
although new disk "sda1" was specified above.
Work around (failed, too)
====================
Grub allows you to specify UUID instead of /dev/....
sudo grub-install --boot-
directory=UUID=9a2e67e5-0583-4901-a523-61a8c75f4296 /dev/sda
Unfortunately that failed, too. Boot resulted in a prompt:
grub>
** Affects: grub2 (Ubuntu)
Importance: Undecided
Status: New
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https://bugs.launchpad.net/bugs/1020045
Title:
"grub-install" inserts wrong UUID when 2 disks
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