Bug#708614: grub-common: Regression from 1.99: update-grub fails in Xen DomU: "warning: grub-probe can't find drive for /dev/xvda1."

[Colin Watson]

On Mon, Aug 12, 2013 at 07:56:30PM +0200, Axel Beckert wrote:
> Colin Watson wrote:
> > OK, so what I need is the output of:
> > 
> >   grub-probe -vv --device /dev/xvda1 --target=fs_uuid
> 
> # grub-probe -vv --device /dev/xvda1 --target=fs_uuid
> grub-probe: info: Looking for /dev/xvda1.
> grub-probe: info: /dev/xvda is a parent of /dev/xvda1.
> grub-probe: info: /dev/xvda1 starts from 0.
> grub-probe: info: opening the device hostdisk//dev/xvda.
> grub-core/kern/disk.c:230: Opening `hostdisk//dev/xvda'...
> grub-core/kern/disk.c:312: Opening `hostdisk//dev/xvda' failed.
> grub-core/kern/disk.c:326: Closing `hostdisk//dev/xvda'.
> grub-probe: warning: disk does not exist, so falling back to partition device /dev/xvda1.
> grub-probe: info: Looking for /dev/xvda1.
> grub-probe: info: /dev/xvda is a parent of /dev/xvda1.
> grub-probe: info: Looking for /dev/xvda1.
> grub-probe: info: /dev/xvda is a parent of /dev/xvda1.
> grub-probe: error: cannot find a GRUB drive for /dev/xvda1.  Check your device.map.

Thanks.  This is apparently a recurrence of
https://bugs.launchpad.net/ubuntu/+source/grub2/+bug/623609 - I'll need
to apply gdb at strategic points to figure out where that went wrong, I
think.

-- 
Colin Watson                                       [cjwatson at debian.org]