ubuntu@ubuntu:~/Downloads$ sudo fdisk -l

Disk /dev/sda: 2000.4 GB, 2000398934016 bytes
255 heads, 63 sectors/track, 243201 cylinders, total 3907029168 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: 0x5577f2b6

   Device Boot      Start         End      Blocks   Id  System
/dev/sda1   *        2048  3907026943  1953512448    7  HPFS/NTFS/exFAT

Disk /dev/sdb: 1000.2 GB, 1000204886016 bytes
240 heads, 63 sectors/track, 129201 cylinders, total 1953525168 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: 0x5eb6f2c7

   Device Boot      Start         End      Blocks   Id  System
/dev/sdb1            2048   305267895   152632924    7  HPFS/NTFS/exFAT
/dev/sdb2   *   305267896  1748721654   721726879+   7  HPFS/NTFS/exFAT
/dev/sdb3      1748721662  1953523711   102401025    5  Extended
/dev/sdb5      1748721664  1766344703     8811520   82  Linux swap / Solaris
/dev/sdb6      1766346752  1953523711    93588480   83  Linux

Disk /dev/sdc: 2000.4 GB, 2000398934016 bytes
255 heads, 63 sectors/track, 243201 cylinders, total 3907029168 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: 0x281c186a

   Device Boot      Start         End      Blocks   Id  System
/dev/sdc1   *        2048  3907024131  1953511042    7  HPFS/NTFS/exFAT

Disk /dev/sdd: 1000.2 GB, 1000204886016 bytes
255 heads, 63 sectors/track, 121601 cylinders, total 1953525168 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: 0x13df7a58

   Device Boot      Start         End      Blocks   Id  System
/dev/sdd1   *          63  1953520383   976760160+   7  HPFS/NTFS/exFAT

Disk /dev/sdf: 8004 MB, 8004304896 bytes
35 heads, 21 sectors/track, 21269 cylinders, total 15633408 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: 0x00000000








/dev/loop0: TYPE="squashfs"
/dev/sda1: LABEL="Movies" UUID="706649B666497DBA" TYPE="ntfs"
/dev/sr0: LABEL="UDF Volume" TYPE="udf"
/dev/sdb1: UUID="7A96AAC996AA856B" TYPE="ntfs"
/dev/sdb2: LABEL="Installs" UUID="6A9CE0129CDFD6A3" TYPE="ntfs"
/dev/sdb6: UUID="a6708577-4f7e-4f18-9e6e-c407613c1c8f" TYPE="ext4"
/dev/sdc1: LABEL="TV Series" UUID="A8926393926364B2" TYPE="ntfs"
/dev/sdd1: UUID="80A40334A4032BEA" TYPE="ntfs"
/dev/sde1: LABEL="PENDRIVE" UUID="1B04-256B" TYPE="vfat"



Commands:

sudo mount /dev/sdb6 /home/ubuntu/temp
sudo grub-install --root-directory=/home/ubuntu/temp /dev/sdb