ubuntu@ubuntu:~$ sudo fdisk -l
Disk /dev/sda: 1500.3 GB, 1500301910016 bytes
255 heads, 63 sectors/track, 182401 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disk identifier: 0x93b91ec3
Device Boot Start End Blocks Id System
/dev/sda1 * 1 10199 81923436 7 HPFS/NTFS
/dev/sda2 10200 182402 1383214678 f W95 Ext'd (LBA)
/dev/sda5 10200 86689 614405893+ 7 HPFS/NTFS
/dev/sda6 86690 163179 614405893+ 7 HPFS/NTFS
/dev/sda7 163180 181416 146484224 83 Linux
/dev/sda8 181416 182402 7917568 82 Linux swap / Solaris
root@ubuntu:~# mkdir /media/ubuntu
root@ubuntu:~# mount /dev/sda7 /media/ubuntu/
root@ubuntu:~# grub-install --root-directory=/media/ubuntu /dev/sda
Installation finished. No error reported.