Reinstalling Grub Question

whitetimer · 2015-05-02 23:19:13

Hi All

I have to reinstall grub efi on a windows/Arch system and just wanted to clarify something. I know I can load up the Arch Live CD and then need to mount the sda where arch is installed. My current partitions are:

sda1 Windows
sda2 Windows Boot efi / Arch Boot efi
sda3 Windows
sda4 Windows
sda5 arch root
sda6 arch
sda7 arch
sda8 arch

if I follow this example mount -t ext4 /dev/sda1 /mnt - Where /dev/sda1 is the partition where Arch Linux is installed.

Which of my partitions would I use ? Would that be sda5 so mount -t ext4 /dev/sda5 /mnt

Do I also have to mount sda2 partition aswell before running grub-install /dev/sda

Cheers

WT

Last edited by whitetimer (2015-05-02 23:26:39)

Head_on_a_Stick · 2015-05-02 23:27:28

How did you install Arch?
https://wiki.archlinux.org/index.php/Be … partitions

whitetimer · 2015-05-02 23:34:48

So same way I originally installed then.

mount -t ext4 /dev/sda5 /mnt
mount -t ext4 /dev/sda2 /mnt/boot/efi

grub-install /dev/sda

Ok cheers

Head_on_a_Stick · 2015-05-02 23:40:46

whitetimer wrote:

So same way I originally installed then.
mount -t ext4 /dev/sda5 /mnt
mount -t ext4 /dev/sda2 /mnt/boot/efi

No, the Beginner's Guide recommends mounting /boot to the EFI system partition.

Read the link I posted.

whitetimer · 2015-05-02 23:57:24

Head_on_a_Stick wrote:

whitetimer wrote:
So same way I originally installed then.
mount -t ext4 /dev/sda5 /mnt
mount -t ext4 /dev/sda2 /mnt/boot/efi
No, the Beginner's Guide recommends mounting /boot to the EFI system partition.
Read the link I posted.

so mount /dev/sda5 /mnt

mkdir /mnt/boot/efi

mount /dev/sda2 /mnt/boot/efi

arch-chroot /mnt

grub-install /dev/sda

Head_on_a_Stick · 2015-05-03 14:19:32

whitetimer wrote:

so mount /dev/sda5 /mnt
mkdir /mnt/boot/efi
mount /dev/sda2 /mnt/boot/efi
arch-chroot /mnt
grub-install /dev/sda

Well the /boot/efi directory should already exist on your system (no need to `mkdir`) and you can mount /boot/efi to $ESP if you want (it's your system).

However, this will stop you from being able to use gummiboot or direct EFISTUB booting without further workarounds and those methods can be very useful in case of problems.

If you start GRUB-related support threads in future, be sure to mention if you have $ESP mounted to /boot/efi

whitetimer · 2015-05-03 20:15:20

Head_on_a_Stick wrote:

whitetimer wrote:
so mount /dev/sda5 /mnt
mkdir /mnt/boot/efi
mount /dev/sda2 /mnt/boot/efi
arch-chroot /mnt
grub-install /dev/sda
Well the /boot/efi directory should already exist on your system (no need to `mkdir`) and you can mount /boot/efi to $ESP if you want (it's your system).
However, this will stop you from being able to use gummiboot or direct EFISTUB booting without further workarounds and those methods can be very useful in case of problems.
If you start GRUB-related support threads in future, be sure to mention if you have $ESP mounted to /boot/efi

Thanks for the advice and yes sda2 was the EFI System partition

Arch Linux

#1 2015-05-02 23:19:13

Reinstalling Grub Question

#2 2015-05-02 23:27:28

Re: Reinstalling Grub Question

#3 2015-05-02 23:34:48

Re: Reinstalling Grub Question

#4 2015-05-02 23:40:46

Re: Reinstalling Grub Question

#5 2015-05-02 23:57:24

Re: Reinstalling Grub Question

#6 2015-05-03 14:19:32

Re: Reinstalling Grub Question

#7 2015-05-03 20:15:20

Re: Reinstalling Grub Question

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