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Old 06-13-2015, 05:45 PM   #1
itscience
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Install Arch with separate boot partition?


I have a dilemma. In my learning curve or learning how to use and install Arch Linux, I have always installed everything under /mnt (/mnt/home /mnt/var, etc).
Recently, I wanted to use a /boot partition and someone said it's better for toubleshooting if you just install everything under it's own directory (/boot /home /var)

I wrote verything down for my installation instructions for Arch and they don't work with the new partitions:
pacstrap /boot grub
pacstrap /mnt base base-devel
genfstab -p /mnt >> /mnt/etc/fstab
arch-chroot /mnt
mkinitcpio -p linux

I do not know how to execute grub-mkconfig -o /dev/sdb (sdb because I'm installing on a USB)

It makes sense to me that the base and all other packages should be in /mnt but grub cannot find any /etc directories and thus can't complete mkconfig.
What should I chroot into and what else am I missing?

Hope this makes sense. Thanks for taking the time to consider my question :-)
 
Old 06-13-2015, 06:13 PM   #2
Head_on_a_Stick
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Quote:
Originally Posted by itscience
someone said it's better for toubleshooting if you just install everything under it's own directory (/boot /home /var)
I don't agree with that statement but anyway...

You need to mount your main partition:
Code:
# mount /dev/sdXY /mnt
Create the /boot directory (the filesystem package is not installed yet so you need to do this manually):
Code:
# mkdir /mnt/boot
Create any other mountpoint directories you wish to use at this point.

Then mount your /boot partition:
Code:
# mount /dev/sdXZ /mnt/boot
https://wiki.archlinux.org/index.php...the_partitions

Replace "X" with the drive letter assigned to your main system drive (probably "b" if it is a USB stick), replace "Y" with the partition number you wish to use for your root partition ("/") and replace "Z" with the partition number you wish to use for /boot -- use `lsblk` to list all attached drives and their sizes.

Mount any other partitions you wish to use at this point.

Then select a mirror by un-commenting the nearest entries from /etc/pacman.d/mirrorlist
https://wiki.archlinux.org/index.php...elect_a_mirror

Then run the `pacstrap` script to install the base system (and any other packages you need):
Code:
# pacstrap /mnt base base-devel
https://wiki.archlinux.org/index.php...he_base_system

Then generate the fstab and configure the system (timezones, keyboard configuration, boot loader/manager. etc).

For configuring GRUB you should use:
Code:
# grub-mkconfig -o /boot/grub/grub.cfg
https://wiki.archlinux.org/index.php...S_motherboards
EDIT: This command should be run after using the `arch-chroot` command.
https://wiki.archlinux.org/index.php...he_base_system

Finally, please refer to the Beginner's Guide (see my signature) when installing Arch as it covers all these steps very clearly.

Last edited by Head_on_a_Stick; 06-13-2015 at 06:24 PM. Reason: Added ArchWiki link
 
Old 06-13-2015, 09:20 PM   #3
syg00
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Quote:
Originally Posted by itscience View Post
I do not know how to execute grub-mkconfig -o /dev/sdb (sdb because I'm installing on a USB)
As noted above, to install Arch you have to read the (excellent) Arch doco.
Your command is a composite of grub-install and grub-mkconfig. It can never work. Just follow the Guide - it's not just for beginners, we all refer back to it on occasion.
 
Old 06-16-2015, 03:45 PM   #4
Germany_chris
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someone didn't read the wiki
 
Old 06-16-2015, 06:53 PM   #5
itscience
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I did but I guess the whole /boot /home thing threw me off.
I asked on another forum about partitioning sizes for a USB Linux and some guy said he didn't understand why I was doing /mnt/home.. The reason being for if your /mnt partition goes bad the /home doesn't need to be affected. I thought I'd try it but grub wouldn't work.

I sorted it, now. using /mnt/boot and it works fine. Many thanks for pointing it out and for the useful tips :-)
 
  


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