grub-probe fails with degraded btrfs

[Brendan Hide]

Hi all

I'm hoping this bug has already been fixed. I couldn't find any 
reference to it online, thus my mail.

Whilst installing Archlinux onto a degraded btrfs (the second disk in a 
"raid1" configuration was "missing" at the time), I found that 
grub-mkconfig failed. The output was:
"/usr/sbin/grub-probe: error: could not find canonical path of ."

After a btrfs device delete/balance, grub-mkconfig succeeded without 
issue. This is, admittedly, an unusual scenario.

In testing post-install I have been unable to reproduce the issue and 
unfortunately I don't have another spare disk to test with. See attached 
log where I attempted, unsuccessfully, to reproduce with loop devices.

Similar error message here two weeks ago 
http://ubuntuforums.org/showthread.php?t=2094451 though not necessarily 
related.

--
__________
Brendan Hide
http://swiftspirit.co.za/
http://www.webafrica.co.za/?AFF1E97

btrfs-grub-probe.0.txt
Description: Text document