[Solved]Having trouble with Grub detecting Windows 8 in dualboot

Question

Hey there,
I have a UEFI board. When I first installed archlinux I did not used the Windows boot partition. To fix this I loaded up the installation media, mounted the partitions as they should be, mounting the microsoft boot partition as /mnt/boot and mounted my UEFI partition into /mnt/boot/efi. I reinstalled the kernel and regenerated the fstab. I also reinstalled grub and os-prober and such and regenerated the config.
When I did all this, there is still not  /boot/EFI/Microsoft. The grub mkconfig does not detect the microsoft boot at all.
What am I missing?
Thanks!
Last edited by Aquila (2013-10-03 17:45:44)

Answer 1

I am using 2 disks: sda and sdb.
I made sda2 is the windows boot partition, sda5 is the root partition for arch, sda6 is the UEFI partition I made for UEFI, sdb2 is the home partition.
I followed the commands in the beginners guide.
Originally I did
mount /dev/sda5 /mnt
mount /dev/sda6 /mnt/boot
mount /dev/sdb2 /mnt/home
pacstrapped and generated fstab and did the three commands for grub before arch-chroot
# umount /sys/firmware/efi/efivars   
# modprobe -r efivars   
# modprobe efivars
Arch-chrooted, changed clock, changed hostname, changed passwd, then installed grub
# pacman -S grub efibootmgr
# grub-install --target=x86_64-efi --efi-directory=/boot --bootloader-id=arch_grub --recheck --debug
# grub-mkconfig -o /boot/grub/grub.cfg
Exited, unmouted, and rebooted
Grub arrives but of course Windows is missing. Windows boot is in sda2. I made sure by looking in gparted lol
At this point I booted installation media again and remounted
mount /dev/sda5 /mnt
mount /dev/sda2 /mnt/boot
mount /dev/sda6 /mnt/boot/efi
mount /dev/sdb2 /mnt/home
Did pre-grub stuff then arch-chrooted in and reinstalled the kernel and grub and grub config
# pacman -U /var/cache/pacman/pkg/linux-3.xx-x.pkg.tar.gz  for reinstalling the kernel in the chroot
At this point I rebooted but I forgot to regenerate the fstab. So I remounted everything the same way, deleted the fstab and regenerated it. The fstab looks ok when I log in. I also then reinstalled grub and made the config again.
This is where I am at now. I also get this weird issue when I shutdown, it immediately starts up again. I know this could be an issue with the Windows 8 fastboot, but I know I disabled that before I installed arch linux.
Any tips would be great. I'm not sure where to go from here.
And yes you're right it should be /boot/efi/EFI/Microsoft. I have /boot/EFI/EFI/arch-grub but not Microsoft in there
Last edited by Aquila (2013-09-30 01:58:24)