Arch Linux

therimalaya

Member

Registered: 2019-04-11

Posts: 2

Clone one arch installed partition to another and make dualboot

I am relatively new with installation and booting process although I learned lots of things these two days and nights. I have to partitions say /dev/sdb2 and /dev/sdb3. /dev/sdb2 contains a fresh working Arch installation with EFI boot system at /dev/sdb1. Now I cloned the partition /dev/sdb2 to /dev/sdb3. Now I would like to change the grub and other boot related problem so that I can choose to boot from one of the partition. I tried to give different UUID to each of the partition and changed fstab mounts accordingly for each of them. I generated the grub using grub-mkconfig but os-prober always stuck at the end. Any suggestion will be helpful so that I don't have to make a complete installation on the other partition.

Zod

Member

From: Hoosiertucky

Registered: 2019-03-10

Posts: 636

Re: Clone one arch installed partition to another and make dualboot

https://wiki.archlinux.org/index.php/GRUB

Make sure to differentiate between UEFI vs BIOS mode

Edit: I don't know what the ramification would be of the original Arch install waking up on a different partition (beyond the grub configuration).

Last edited by Zod (2019-04-11 20:42:00)

natervance

Member

Registered: 2017-04-20

Posts: 53

Re: Clone one arch installed partition to another and make dualboot

If os-prober is truly getting stuck (erroring out), then I would recommend completely reinstalling GRUB using the grub-install command (might be a good idea anyway after messing with partitions).

In terms of general slowness, I've experienced os-prober taking obscene amounts of time scanning large hard disks, so it may just be taking a while. In that case, once it coughs up the configuration, then disable os-prober and copy the configuration to /etc/grub.d/40_custom so that you don't have to wait so long next time.

In terms of ramifications of Arch waking up on a new partition, as long as /etc/fstab is repaired it should all work out.

Slithery

Administrator

From: Norfolk, UK

Registered: 2013-12-01

Posts: 5,776

Re: Clone one arch installed partition to another and make dualboot

Or just bypass grubs automatic configuration and create your own minimal config...
https://wiki.archlinux.org/index.php/Us … figuration

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No, it didn't "fix" anything. It just shifted the brokeness one space to the right. - jasonwryan
Closing -- for deletion; Banning -- for muppetry. - jasonwryan

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