Red Hat Bugzilla – Bug 984283
Grub2/mkconfig should allow booting via LABEL in addition to UUID
Last modified: 2015-02-17 11:08:56 EST
Description of problem:
Installed Fedora to a USB stick for a training course. Performed updates and did a reboot at which point grub2 was reinstalled and picked up the installed harddisc rather than the USB stick.
This caused boot failures as it changed the set root line to the wrong disc and set all the wrong UUIDs.
I tried to configure the scripts in /etc/grub.d to not do this and to use root=LABEL=FedoraBootable but it's not well supported defined and ended up just hard coding it in /boot/grub2/grub.cfg
Version-Release number of selected component (if applicable):
Everytime. Have existing Fedora install. Install to thumbstick. Apply updates that affect kernel/grub and reboot - watch as UUIDs and set roots are trashed.
Fails to boot correct kernel from the correct partition and typically crashes
System works as expected and boots to desktop
http://techpatterns.com/forums/about1575.html and https://wiki.archlinux.org/index.php/GRUB provide good resources on setting this correctly and how to use the label but they're no match for defaults that don't trash the boot device.
The modifications done on kernel upgrades is performed by grubby. If the problem here is the behaviour on upgrade then the issue should be filed at grubby.
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