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

Sean Greenslade sean at seangreenslade.com
Sun Oct 20 21:34:09 EDT 2013

On Wed, Oct 16, 2013 at 09:55:43PM -0400, Sean Greenslade wrote:
> I can say with certainty that the madadm assembly happens in the initrd,
> but I can't find any log messages pertaining to the LVM scan, even on
> successful boot. There is the following line that occurs before the root
> pivot, and which is the line that breaks the boot with the latest lvm2:
> Oct 15 17:01:14 rat systemd[1]: Expecting device
> dev-mapper-raidgroup\x2ddata.device...
> Here's my mkinitcpio.conf lines: (works with downgrade,
> not with current):
> MODULES="dm_mod"
> HOOKS="base udev mdadm_udev autodetect modconf block lvm2 filesystems
> keyboard fsck"
> --Sean

And now, after another system update, the problem has vanished. There
was a kernel update, so I'm willing to believe that it was just some
strange transient interaction between LVM, mdadm and the initramfs
kernel. Just another day in the life of Arch, I suppose.

Thanks for the attention.

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