I don't think it is related to Bug 115616. Yes, mdadm make's my machine
unbootable, because mdadm and lvm2 are for some reasons not compatible.
Needs a recovery disk to chroot in the error disk. *When mounting the /boot
from the error disk*: I am able to do apt-get remove mdadm which cause
regenerating of the initrd.img-2.6.28-14-server. Then the error disk will
boot well.

2010/4/1 ceg <[email protected]>

>
> Thanks for responding. Oh I see, my comment about changing the partition
> type was under the assumption of type fd Linux raid autodetect.
>
> Looking for the message you reported, could it be a little different and
> rather unrelated to mdadm? (Bug #115616
> http://forum.ubuntuusers.de/topic/device-mapper-device-lookup-
> failure/#post-767892).
>
> As you didn't actually write that mdadm made your machine unbootable
> while installed, this actually issue seems resolved (as well as the
> actual Bug #115616). Thanks again.
>
>
> ** Changed in: mdadm (Ubuntu)
>       Status: New => Invalid
>
> --
> initramfs images not recreated during *un*-install
> https://bugs.launchpad.net/bugs/418803
> You received this bug notification because you are a direct subscriber
> of the bug.
>
> Status in “mdadm” package in Ubuntu: Invalid
>
> Bug description:
> After installing mdadm on a running ubuntu 9.04 and doing nothing more than
> reboot. It give a device mapper, dm-linear, Device loopup failed. This is
> because of the 8e partition type. A apt-get remove mdadm doesn't fix the
> error.
>
> To unsubscribe from this bug, go to:
> https://bugs.launchpad.net/ubuntu/+source/mdadm/+bug/418803/+subscribe
>

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dm-linear, lookup failed
https://bugs.launchpad.net/bugs/418803
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