UEFI

wiki.ubuntu-it.org/Installazione/UEFI

grub legacy

root@sysresccd:/# parted /dev/sda print
Model: ATA ST500LT012-9WS14 (scsi)
Disk /dev/sda: 500GB
Sector size (logical/physical): 512B/4096B
Partition Table: gpt
Number Start End Size File system Name Flags
1 1049kB 524MB 523MB ntfs Basic data partition hidden, diag
2 524MB 839MB 315MB fat32 EFI system partition boot
3 839MB 973MB 134MB Microsoft reserved partition msftres

parted /dev/sda set 1 bios_grub on