Arch Linux

bonbonboi

Member

Registered: 2016-01-16

Posts: 6

How to make me Arch works with AHCI/ IDE Modes

Hello, I installed Arch with IDE mode, now I want to back to AHCI mode, still it cannot boot and drop me to the shell, before I was using another Linux distros, I was switching modes without any issues.

pypi

Wiki Maintainer

Registered: 2014-04-22

Posts: 250

Re: How to make me Arch works with AHCI/ IDE Modes

Hello, I installed Arch with IDE mode, now I want to back to AHCI mode, still it cannot boot and drop me to the shell, before I was using another Linux distros, I was switching modes without any issues.

I have

MODULES="ahci"

in my mkinitcpio.conf (you will need to regenerate the mkinitcpio afterwards if you change that).
Perhaps try that?
I'm not sure why I did that - I can't see anything on the wiki mentioning it; if anyone else can dig it up I'd be interested.

EDIT: Having experimented with removing that line, it appears that it is not needed. I've no idea why that ended up in my otherwise vanilla mkinitcpio.conf... but apologies anyway for seemingly spreading misinformation.

Last edited by pypi (2016-05-16 05:13:45)

graysky

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Registered: 2008-12-01

Posts: 10,597

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Re: How to make me Arch works with AHCI/ IDE Modes

I don't think that you will need any special module... I would make sure your BIOS properly addresses the boot disk.  If it does, boot from a live environment and verify that the UUIDs are the same and regenerate your grub.cfg if not or maybe even reinstall grub to the MBR or $esp.

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clfarron4

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From: London, UK

Registered: 2013-06-28

Posts: 2,163

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Re: How to make me Arch works with AHCI/ IDE Modes

I didn't have to do anything with my Arch Installation when switching from IDE to AHCI.

Following graysky's advice, I'd also check that the GRUB entries are using UUIDs as well.

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bonbonboi

Member

Registered: 2016-01-16

Posts: 6

Re: How to make me Arch works with AHCI/ IDE Modes

well, I checked grub.conf I found all OK
I have UUID as:
/boot with this UUID: 51560223-97dd-4826-a4bb-6081fcd5b4fe so it must be auto-detected by
search --no-floppy --fs-uuid --set=root 51560223-97dd-4826-a4bb-6081fcd5b4fe
and / with this UUID 1a626278-8db7-4f5b-8aaa-8974c904fe44 must be auto-detected by
root=UUID=1a626278-8db7-4f5b-8aaa-8974c904fe44
also swap space for hibernate as this
resume=UUID=91181b88-bd7b-442c-9a9f-e7f06cdd65b7
so I'm going to double check before I reply back once more, going to change to ahci and check stuff with the shell to see where the missing part..

bonbonboi

Member

Registered: 2016-01-16

Posts: 6

Re: How to make me Arch works with AHCI/ IDE Modes

well, looks like solved by mkinitcpio -g  /boot/initramfs-linux.img