Install-grub2-i386-pc
DEVICE/A, UNIT/N/K/A, PARTITIONNUMBER=PN/K/N, GRUB/K/A, FORCELBA/S
C:
Installs the GRUB 2 bootloader to the boot block of the specified disk or partition.
DEVICE -- Device name (e.g. ata.device)
UNIT -- Unit number
PN -- Specifies a partition number. If specified, GRUB is installed
to this partition's boot block. Otherwise, GRUB is installed to
the disk's boot block.
GRUB -- Path to GRUB directory.
FORCELBA -- Force use of LBA mode.
Install-grub2-i386-pc DEVICE ata.device UNIT 0 GRUB DH0:boot/grub
Partition SYS:System/Format