* Simplify usage for grub handling, now it's just GRUB="/dev/sdX[#]".
* Execute blockdev to reread partition table.
* Replace vol_id command with blkid.
* Simplify usage for grub handling, now it's just GRUB="/dev/sdX[#]".
* Execute blockdev to reread partition table.
* Replace vol_id command with blkid.