19c698d123
When grub-probe fails, the current code is to just stuff an empty result in which causes the user to not knowingly have a system that no longer boots. grub-probe can fail because the ZFS pool that contains the root filesystem might have features that GRUB does not yet support which is a common configuration for people with a rpool and a bpool. This behavior uses the zdb utility to dump the same value as the filesystem label would print. Signed-off-by: Doug Goldstein <cardoe@cardoe.com> Reviewed-by: Daniel Kiper <daniel.kiper@oracle.com>
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.