Dear all,
I recently hit a relatively common problem whit the Ubuntu 16.04 installer,
that misconfigures the location of the GRUB folder [0]. In such cases the
system boots into a rescue shell with the following messages:
error: file '/grub/i386-pc/normal.mod' not found.
Entering rescue mode...
grub rescue>
This means GRUB was able to boot, but it is looking for its modules in the
wrong place. The well known solution is to instruct GRUB on the fly on the
location of its modules [1]. In my case this is:
grub rescue> set prefix=(hd1,msdos2)/boot/grub
grub rescue> insmod normal
grub rescue> normal
This resumes the boot process successfully. However, the next time the system
is booted GRUB falls back again to the rescue console, and it must be
instructed again on the location of its modules. I have reinstalled GRUB but it
did not fix the issue.
I then tried the Boot-Repair tool, starting by confirming the GRUB location, it
is apparently correct: /boot/grub on sdg2. I then ran the Recommended Repair
diagnosis, the full output is on Pastebin [2]. The diagnosis output also
reported the correct location for GRUB:
sdg2: __________________________________________________________________________
File system: ext4
Boot sector type: -
Boot sector info:
Operating System: Ubuntu 16.04.3 LTS
Boot files: /boot/grub/grub.cfg /etc/fstab
/boot/grub/i386-pc/core.img
However, there is an error at the very end of the report, that points to an
issue with device.map:
grub-probe: error: cannot find a GRUB drive for /dev/sdi1. Check your
device.map.
Unhide GRUB boot menu in sdg2/boot/grub/grub.cfg
An error occurred during the repair.
Any suggestion on what can be made about this?
Thank you.
[0] https://askubuntu.com/q/266429/177437
[1] https://askubuntu.com/a/462995/177437
[2] http://paste.ubuntu.com/25915919/
--
Luís de Sousa
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