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Prasad RD
Asked: 2014-01-07 00:05:38 +0800 CST

How to install grub on this system

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I have two Hard disk drives, as shown in the screenshot

1TB HDD 500GB HDD

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.

13.10

1 Answers

  1. Best Answer

    If you really don't want to reinstall Ubuntu, you can try to convert your install into UEFI mode this way. But it may fail as your Ubuntu disk is not GPT.

    If it fails, then backup your documents onto an external disk, format your sda disk in GPT, set up your BIOS (UEFI firmware) in UEFI mode, and reinstall Ubuntu on sda.

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