Bug#563947: linux-image-2.6.30-2-686 doesn't start software raid on boot

[maximilian attems <max@stro.at>]

On Thu, Jan 07, 2010 at 02:39:17PM +0100, trophime wrote:
> ii  lvm2                        2.02.54-1                   The Linux
> Logical Volume Manager
> ii  mdadm                       3.0.3-2                     tool to
> administer Linux MD arrays (software RAID)
> ii  udev                        149-2                       /dev/ and
> hotplug management daemon
> ii  util-linux                  2.16.2-0
> Miscellaneous system utilities

this looks fine.
> 
> >    bootlog or at least picture of wrong boot.
> 
> On boot the error message is the following:
> 	mdadm: No devices listed in conf file were not found
> 	      Volume group "System" not found
> 	      Skipping volume group
>         unable to find LVM volume System/debian
> 
> I have no other trace...

did you get thrown to a console?
add bootparam rootdelay=12 to grub and wait for 12 seconds,
then check which devices exists: ls -l/dev/[hs]da*
see more info on http://wiki.debian.org/InitramfsDebug