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.
