Bug#987008: Grub fails to find LVM volume after previous LV rename

[Rogier]

Additional information for the benefit of anybody who uses LVM and 
grub, and is unsure if or when this problem will affect them:

Besides the system being rendered unbootable, another symptom of this 
problem being acute is that, at that time, update-grub will most 
probably(*) print messages of the following kind, one for each LVM 
filesystem affected:

grub-probe: error: disk `lvmid/******-****-****-****-****-****-
******/******-****-****-****-****-****-******' not found.

The immediate workaround, if this problem occurs, would be to make 
another modification to the LVM configuration. Then run update-grub 
again. For verification, the following command can also be used:

grub-probe -d /dev/mapper/<device corresponding to one of the LVs> -t 
fs

If the problem is acute, the error message should be printed, if it is 
not acute, then there should be no error message (no warranties :-).

Kind regards,

Rogier.


(*) but not if os-prober is disabled for update-grub.