View Full Version : [ubuntu] Dualboot with Windows 8 UEFI

April 2nd, 2013, 08:14 AM
When install Ubuntu and dual boot with windows 8, is it better to share the EFI partition that Windows 8 have or is it better creating one for Ubuntu too? Having two EFI partitions?

I canīt get it to work, Ubuntu boots but not Windows 8, I have two EFI partitions. I have tried the Ubuntu boot rescue disk but it does not work either


I installed Arch instead followed this tutorial.
http://www.neuraladvance.com/2012/11/17/arch-linux-windows-8-uefi-lvm/ (http://www.neuraladvance.com/2012/11/17/arch-linux-windows-8-uefi-lvm/)

April 2nd, 2013, 06:34 PM
You only can have one efi partition per hard drive. Your link is for two hard drive install.

If you boot Ubuntu in UEFI mode it will install grub2's efi boot files into the existing efi partition, in a separate ubuntu folder. With two drives you should install grub'2 efi files to the same hard drive as the Ubuntu install and then modify the chain load to Windows to see the other efi partition on the Windows drive.

April 3rd, 2013, 07:34 AM
I modified the tutorial for my needs, using sda disk instead and ordinary partitions.