[arch-general] LVM + mdadm no longer works on boot

Thomas Bächler thomas at archlinux.org
Wed Oct 16 04:55:43 EDT 2013

Am 15.10.2013 21:37, schrieb Sean Greenslade:
> Hi, all. I'm running a small fileserver that has three SATA drives set
> up in RAID5 via mdadm. That RAID holds one LVM pv which is split up into
> several logical volumes. This setup has worked fine in the past, but
> with the lastest system update my LVM partitions are not getting
> discovered correctly, leading to the boot hanging until I manually run
> "vgchange -ay". After that, the boot proceeds as normal.
> It would appear that the latest lvm2 package is what causes the issue.
> Downgrading to 2.02.100-1 boots fine, whereas 2.02.103-1 hangs.
> So how exactly should I proceed from here? I'm trying to understand how
> systemd makes it all work together, but I'm rather confused by it all.

Are you assembling RAID and LVM in initrd? If so, what's your HOOKS line
in mkinitcpio.conf?

I've seen reports like this before (although most people said they were
fixed with updates and had problems before 2.02.100). Sadly, I could
never reproduce it, so I don't know how to debug it.

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