I use Ubuntu 14.04 as my operating system and recently I bought a new hard drive where I want to install windows 8.
How I can install 8 in the second hard drive and then be able to boot them from the Ubuntu grub?
Insert the second hdd.
Check it is /dev/sdb and Ubuntu hdd is /dev/sda.
If not so, change the ide/sata wires.
Disconnect Ubuntu hdd.
Connect Ubuntu hdd.
Open a terminal.
sudo -i update-grub
Windows should enter the Grub menu.
Firstly setup the Win8 to a free-space on your HDD. Then Use a Live any Linux CD/DVD/USB for the Boot Menu. You need to install GRUB. You'll se if you put your Live CD to your computer.