Arch Linux

ivanoff

Member

Registered: 2012-03-18

Posts: 78

[SOLVED] No raid after reboot with last mdadm 4.5-1

Hi there
I don't know if this is related to anything, but the thing is after the last update, where I remember seeing some firmware updates, I have no raid recognised anymore.
My disks are there, but no /dev/mdX nor /proc/mdstat
What should I do,
rollback the firmwares?
or something else?
Am I the only one?
Thank you

*edit* was linked to mdadm broken update

Last edited by ivanoff (2026-02-27 06:28:57)

frostschutz

Member

Registered: 2013-11-15

Posts: 1,610

Re: [SOLVED] No raid after reboot with last mdadm 4.5-1

This was reported in the German forum as well, https://forum.archlinux.de/d/35734-warn … ist-defekt where md modules were somehow not loaded but assembling manually worked.

Try setting MODULES in mkinitcpio.conf, to include raid1, raid456, and/or md modules.

ivanoff

Member

Registered: 2012-03-18

Posts: 78

Re: [SOLVED] No raid after reboot with last mdadm 4.5-1

Thank you, I added (md) in the modules, and noticed indeed some progress. Now /proc/mdstat shows my raid , but as inactive.
The UUID doesn't seem to be recognized anymore, and I cannot mount the ext4 raid: bad superblock

Last edited by ivanoff (2026-02-26 21:11:04)

Scimmia

Fellow

Registered: 2012-09-01

Posts: 13,577

Re: [SOLVED] No raid after reboot with last mdadm 4.5-1

Nothing to do with firmware, mdadm problem; version in testing is supposed to fix it.
https://gitlab.archlinux.org/archlinux/ … -/issues/4

ivanoff

Member

Registered: 2012-03-18

Posts: 78

Re: [SOLVED] No raid after reboot with last mdadm 4.5-1

Great news. I was about to worry. I will wait for the correction then.
Thanks all

ivanoff

Member

Registered: 2012-03-18

Posts: 78

Re: [SOLVED] No raid after reboot with last mdadm 4.5-1

So, downgraded to mdadm 4.4-2, removed the md module in /etc/mkinitcpio.conf, rebuilt the initram, and everything's back to normal.
Was worried for a bit. Please mdadm, don't do that to me again.

Last edited by ivanoff (2026-02-27 07:24:37)

TuxThepenguin76

Member

Registered: 2023-07-06

Posts: 9

Re: [SOLVED] No raid after reboot with last mdadm 4.5-1

I had the same problem, reverted to mdadm to 4.4-2 and will wait for the fix

albinoloverats

Member

From: London

Registered: 2007-12-18

Posts: 30

Website

Re: [SOLVED] No raid after reboot with last mdadm 4.5-1

Glad it wasn't just me :-)

Having been dropped to the recovery console I was able to boot by loading the module manually

modprobe md_mod

assembling the arrays

mdadm --assemble --scan

which gave me my expected devices

/dev/mdX

and I was finally able to

mount /dev/mdX /new_root

(If anyone else need help booting to be able to downgrade.)

ivanoff

Member

Registered: 2012-03-18

Posts: 78

Re: [SOLVED] No raid after reboot with last mdadm 4.5-1

Tested the 4.5-2 version: everything's back to normal