ubuntu-gnome@ubuntu-gnome:~$ sudo fdisk -lu
Disk /dev/sda: 750.2 GB, 750156374016 bytes
255 heads, 63 sectors/track, 91201 cylinders, total 1465149168 sectors
Units = sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 4096 bytes
I/O size (minimum/optimal): 4096 bytes / 4096 bytes
Disk identifier: 0x5be4a3f9
Device Boot Start End Blocks Id System
/dev/sda1 2048 52430847 26214400 1c Hidden W95 FAT32 (LBA)
/dev/sda2 52430848 681576447 314572800 7 HPFS/NTFS/exFAT
/dev/sda3 681578494 1404233727 361327617 5 Extended
Partition 3 does not start on physical sector boundary.
/dev/sda5 681578496 1267513343 292967424 83 Linux
/dev/sda6 1365172224 1384703473 9765625 82 Linux swap / Solaris
/dev/sda7 1267515392 1365170175 48827392 83 Linux
/dev/sda8 * 1384704000 1404233727 9764864 83 Linux
Partition table entries are not in disk order
Disk /dev/sdb: 4009 MB, 4009754624 bytes
128 heads, 22 sectors/track, 2781 cylinders, total 7831552 sectors
Units = sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disk identifier: 0xc3072e18
Device Boot Start End Blocks Id System
/dev/sdb1 * 63 7831551 3915744+ b W95 FAT32
ubuntu-gnome@ubuntu-gnome:~$ sudo grub-install /dev/sda7
Path `/boot/grub' is not readable by GRUB on boot. Installation is impossible. Aborting.
ubuntu-gnome@ubuntu-gnome:~$ sudo update-grub
/usr/sbin/grub-probe: error: failed to get canonical path of /cow.
ubuntu-gnome@ubuntu-gnome:~$ sudo grub-install /dev/sda8
Path `/boot/grub' is not readable by GRUB on boot. Installation is impossible. Aborting.
ubuntu-gnome@ubuntu-gnome:~$ sudo mount /dev/sda8 /mnt
ubuntu-gnome@ubuntu-gnome:~$ sudo mount /dev/sda8 /mnt/boot/efi
mount: mount point /mnt/boot/efi does not exist
ubuntu-gnome@ubuntu-gnome:~$ sudo unmount /dev/sda8
sudo: unmount: command not found
ubuntu-gnome@ubuntu-gnome:~$ sudo mount /dev/sda7 /mnt
ubuntu-gnome@ubuntu-gnome:~$ sudo mount /dev/sda8 /mnt/boot/efi
ubuntu-gnome@ubuntu-gnome:~$ sudo mount -o bind /dev /mnt/dev
ubuntu-gnome@ubuntu-gnome:~$ sudo mount -o bind /sys /mnt/sys
ubuntu-gnome@ubuntu-gnome:~$ sudo mount -t proc /proc /mnt/proc
ubuntu-gnome@ubuntu-gnome:~$ sudo cp /proc/mounts /mnt/etc/mtab
ubuntu-gnome@ubuntu-gnome:~$ sudo chroot /mnt /bin/bash
root@ubuntu-gnome:/# grub-install /dev/sda8
Extended partition info not supported.
Error: no partition information on disk /dev/sda.
Cowardly refusing to create a boot option.
Installation finished. No error reported.
root@ubuntu-gnome:/#