Quoting Sam Varghese (sam@gnubies.com):
From my personal experience, you can only have Windows 8 and Ubuntu on the same machine on separate drives [2]. This install was done in the bog standard way.
Sam, here's one guy who did a relatively straightforward installation on a _single_ drive (starting with an empty hard drive) of MS-Windows 8 into its own partition, then Linux (Ubuntu 12.10 - no accounting for taste) into _its_ own partitions, and then letting MS-Windows handle the early stages of booting, chain-booting to GRUB in /dev/sda3 when booting Linux, with MS-Windows getting help from a proprietary booting-management program for MS-Windows called EasyBCD: http://www.linuxbsdos.com/2012/11/05/dual-boot-windows-8-and-ubuntu-12-10-on... Seems a shame to feel obliged to surrender control over booting to Microsoft. I'm not sure that part's obligatory. I would actually think it's a whole lot smarter to install Linux as the primary OS with custody of the entire drive and then install MS-Windows 8 inside a virtual machine (VirtualBox, VMware, whatever). http://www.labnol.org/software/install-windows-8-as-virtual-machine/20919/