grub-setup -v '(md0)'
grub-setup: info: the size of hd0 is 488397168
grub-setup: info: the size of hd0 is 488397168
grub-setup: info: the size of hd1 is 488397168
grub-setup: info: the size of hd1 is 488397168
grub-setup: info: the size of hd2 is 488397168
grub-setup: info: the size of hd2 is 488397168
grub-setup: info: the size of hd3 is 488397168
grub-setup: info: the size of hd3 is 488397168
grub-setup: info: the size of hd0 is 488397168
grub-setup: info: opening the device `/dev/sda'
grub-setup: info: the size of hd0 is 488397168
grub-setup: info: the size of hd0 is 488397168
grub-setup: info: opening the device `/dev/sda1'
grub-setup: info: opening the device `/dev/sda1'
grub-setup: info: opening the device `/dev/sda1'
grub-setup: info: opening the device `/dev/sda'
grub-setup: info: the size of hd0 is 488397168
grub-setup: info: opening the device `/dev/sda'
grub-setup: info: opening the device `/dev/sda'
grub-setup: info: the size of hd0 is 488397168
grub-setup: info: opening the device `/dev/sda'
grub-setup: info: opening the device `/dev/sda'
grub-setup: info: opening the device `/dev/sda'
grub-setup: info: the size of hd0 is 488397168
grub-setup: info: opening the device `/dev/sda'
grub-setup: info: opening the device `/dev/sda'
grub-setup: info: the size of hd0 is 488397168
grub-setup: info: opening the device `/dev/sda'
grub-setup: info: opening the device `/dev/sda'
grub-setup: info: the size of hd1 is 488397168
grub-setup: info: opening the device `/dev/sdb'
grub-setup: info: the size of hd1 is 488397168
grub-setup: info: the size of hd1 is 488397168
grub-setup: info: opening the device `/dev/sdb1'
grub-setup: info: opening the device `/dev/sdb1'
grub-setup: info: opening the device `/dev/sdb1'
grub-setup: info: opening the device `/dev/sdb'
grub-setup: info: the size of hd1 is 488397168
grub-setup: info: opening the device `/dev/sdb'
grub-setup: info: opening the device `/dev/sdb'
grub-setup: info: the size of hd1 is 488397168
grub-setup: info: opening the device `/dev/sdb'
grub-setup: info: opening the device `/dev/sdb'
grub-setup: info: opening the device `/dev/sdb'
grub-setup: info: the size of hd1 is 488397168
grub-setup: info: opening the device `/dev/sdb'
grub-setup: info: opening the device `/dev/sdb'
grub-setup: info: the size of hd1 is 488397168
grub-setup: info: opening the device `/dev/sdb'
grub-setup: info: opening the device `/dev/sdb'
grub-setup: info: the size of hd2 is 488397168
grub-setup: info: opening the device `/dev/sdc'
grub-setup: info: the size of hd2 is 488397168
grub-setup: info: the size of hd2 is 488397168
grub-setup: info: opening the device `/dev/sdc1'
grub-setup: info: opening the device `/dev/sdc1'
grub-setup: info: opening the device `/dev/sdc1'
grub-setup: info: opening the device `/dev/sdc'
grub-setup: info: the size of hd2 is 488397168
grub-setup: info: opening the device `/dev/sdc'
grub-setup: info: opening the device `/dev/sdc'
grub-setup: info: the size of hd2 is 488397168
grub-setup: info: opening the device `/dev/sdc'
grub-setup: info: opening the device `/dev/sdc'
grub-setup: info: opening the device `/dev/sdc'
grub-setup: info: the size of hd2 is 488397168
grub-setup: info: opening the device `/dev/sdc'
grub-setup: info: opening the device `/dev/sdc'
grub-setup: info: the size of hd2 is 488397168
grub-setup: info: opening the device `/dev/sdc'
grub-setup: info: opening the device `/dev/sdc'
grub-setup: info: the size of hd3 is 488397168
grub-setup: info: opening the device `/dev/sdd'
grub-setup: info: the size of hd3 is 488397168
grub-setup: info: the size of hd3 is 488397168
grub-setup: info: opening the device `/dev/sdd1'
grub-setup: info: opening the device `/dev/sdd1'
grub-setup: info: opening the device `/dev/sdd1'
grub-setup: info: opening the device `/dev/sdd'
grub-setup: info: the size of hd3 is 488397168
grub-setup: info: opening the device `/dev/sdd'
grub-setup: info: opening the device `/dev/sdd'
grub-setup: info: the size of hd3 is 488397168
grub-setup: info: opening the device `/dev/sdd'
grub-setup: info: opening the device `/dev/sdd'
grub-setup: info: opening the device `/dev/sdd'
grub-setup: info: the size of hd3 is 488397168
grub-setup: info: opening the device `/dev/sdd'
grub-setup: info: opening the device `/dev/sdd'
grub-setup: info: the size of hd3 is 488397168
grub-setup: info: opening the device `/dev/sdd'
grub-setup: info: opening the device `/dev/sdd'
grub-setup: info: prefix = /grub
grub-setup: info: changing current directory to /dev/mapper
grub-setup: info: /dev/sda starts from 0
grub-setup: info: getting the size of /boot/grub/boot.img
grub-setup: info: reading /boot/grub/boot.img
grub-setup: info: getting the size of /boot/grub/boot.img
grub-setup: info: getting the size of /boot/grub/core.img
grub-setup: info: reading /boot/grub/core.img
grub-setup: info: getting the size of /boot/grub/core.img
grub-setup: error: unknown device