[gentoo-amd64] having trouble running root off raid

[Richard Freeman <rich@thefreemanclan.net>]

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Ok, I've been steadily migrating all my data to a raid array.  I have
everything running under raid5+lvm2, except for my root partition, which
is 1GB and running raid1 (no lvm).

On the root partition are:

bin, sbin, lib32, lib64, root, etc

I think that should be all that is needed to boot the system and mount
/usr, /var, and everything else.  Actually, I know it is, since I can
boot just fine with only those directories actually on my old root.

The system boots just fine with the root partition on a non-md device
(my old root).  When I try to boot with root=/dev/md2, however, I get a
panic right after the freeing memory message.  The error is unable to
open initial console.  I was wondering if for some reason it couldn't
find init, so I explicitly stated init=/sbin/init - no effect.  Then I
tried setting init=/bin/bash to see if I could at least get a shell -
that gave me a not syncing (attempted to kill init) panic.

Am I missing something obvious?  I do see on the console that it is
building the /dev/md2 array.  Also, I get the "VFS: Mounted root (ext3
filesystem) readonly." message, so it obviously is looking at the root
filesystem.
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