unity grub-install on raid incorrectly handles 'writemostly' flag
| Affects | Status | Importance | Assigned to | Milestone | |
|---|---|---|---|---|---|
| grub-installer (Ubuntu) |
Fix Released
|
Medium
|
Colin Watson | ||
Bug Description
Binary package hint: ubiquity
I have three disks for software raid that I have set up as /dev/sd[abc]1. The third disk is slower than the first two, so I have it marked as "writemostly" through mdadm. They are assembled onto raid array /dev/md0.
However, ubiquity tries to guess that the bootloader should be installed on all /dev/sd[abc]. That is fantastically-smart behaviour.
However, when probing the array properties, it gets confused. Output of /var/log/messages is:
Nov 24 02:52:38 ubuntu grub-installer: info: Installing grub on '/dev/sda /dev/sdb writemostly /dev/sdc'
Nov 24 02:52:38 ubuntu grub-installer: info: grub-install supports --no-floppy
Nov 24 02:52:38 ubuntu grub-installer: info: Running chroot /target grub-install --no-floppy --force "/dev/sda"
Nov 24 02:52:40 ubuntu grub-installer: Installation finished. No error reported.
Nov 24 02:52:40 ubuntu grub-installer: info: grub-install ran successfully
Nov 24 02:52:40 ubuntu grub-installer: info: grub-install supports --no-floppy
Nov 24 02:52:40 ubuntu grub-installer: info: Running chroot /target grub-install --no-floppy --force "/dev/sdb"
Nov 24 02:52:42 ubuntu grub-installer: Installation finished. No error reported.
Nov 24 02:52:42 ubuntu grub-installer: info: grub-install ran successfully
Nov 24 02:52:42 ubuntu grub-installer: info: grub-install supports --no-floppy
Nov 24 02:52:42 ubuntu grub-installer: info: Running chroot /target grub-install --no-floppy --force "writemostly"
Nov 24 02:52:44 ubuntu grub-installer: Invalid device `writemostly'.
Nov 24 02:52:44 ubuntu grub-installer: Try `/usr/sbin/
Nov 24 02:52:44 ubuntu grub-installer: error: Running 'grub-install --no-floppy --force "writemostly"' failed.
At this point, I get the graphical "Bootloader install failed" dialog, with "How would you like to proceed?"
The problem is that the "okay" button is always greyed out, and thus the installation hangs/fails.
| Andrew Fernandes (andrew-fernandes) wrote | #1 |
| affects: | ubiquity (Ubuntu) → grub-installer (Ubuntu) |
| Changed in grub-installer (Ubuntu): | |
| importance: | Undecided → Medium |
| status: | New → Triaged |
| Colin Watson (cjwatson) wrote | #2 |
| Changed in grub-installer (Ubuntu): | |
| status: | Triaged → Fix Committed |
| assignee: | nobody → Colin Watson (cjwatson) |
| Launchpad Janitor (janitor) wrote | #3 |
| Changed in grub-installer (Ubuntu): | |
| status: | Fix Committed → Fix Released |
I should add that booting also fails since the grub configuration now has a syntax error in it; thus this configuration leads to an unbootable install.