I have two Hard disk drives, as shown in the screenshot
First HDD (Sda) is a MBR Disk and second HDD (Sdb) is a GPT Disk (Which has windows 8.1x64). I have installed ubuntu on Sda4 disk and windows 8.1 on Sdb4. I need to setup grub to boot both windows and ubuntu OSes with EFI capable mode (my motherboard is intel DH77KC and it has UEFI bios)
I tried to install grub and search for Windows 8 but it doesn't detect win8, also the windows 8 disk is inaccessible on ubuntu... I have to disable EFI mode so I can boot grub before it automatically boots up windows 8...but without efi mode, win 8 doesn't boot, so I need to install grub on efi support without re-installing ubuntu. is it possible? only windows 8 is on efi mode, windows 7 is mbr mode.