3a310e842f
* util/grub.d/30_os-prober.in: Tolerate devices with no filesystem UUID. Other parts of grub-mkconfig tolerate these, they were previously allowed here up to commit 55e706c918922def17f5012c23cfe88c4c645208, and they can arise in practice when the system has active LVM snapshots. Fixes Ubuntu bug #1287436.
All executable files in this directory are processed in shell expansion order. 00_*: Reserved for 00_header. 10_*: Native boot entries. 20_*: Third party apps (e.g. memtest86+). The number namespace in-between is configurable by system installer and/or administrator. For example, you can add an entry to boot another OS as 01_otheros, 11_otheros, etc, depending on the position you want it to occupy in the menu; and then adjust the default setting via /etc/default/grub.