Should disks in a raid really prevent booting?

[poma]

On 27.03.2015 21:10, Tom Horsley wrote:
> On Fri, 27 Mar 2015 18:06:15 +0100
> poma wrote:
> 
>> See if this is relevant:
> 
> I don't think so. It definitely wasn't a degraded
> array - it was brand new with both disks involved
> operating fine. It was also simply a data disk,
> the boot and swap partitions were not on the raid.
> 
> I suspect it just didn't have kernel modules it
> needed in the initramfs. It was never able to
> recognize the disks (at least that's what it
> seemed to be saying in the boot messages).
> 
> When I booted off an f21 live USB, it had no
> problems. I'm not sure how the heck the
> initramfs normally gets built on a kernel update.
> I didn't see anything automatically applying
> the hostonly option, but when I updated the
> kernel in the fedora 21 boot partition by
> chrooting into it from the live USB session,
> the newly installed kernel was able to boot just
> fine, so the new update apparently included
> whatever was missing previously.
> 

This line should lead you to the end of the kernel installation road:
http://pkgs.fedoraproject.org/cgit/kernel.git/tree/kernel.spec#n2030