Description of problem:


Version-Release number of selected component (if applicable):

I use a DELL R730xd aith a PERC H730 Mini RAId controller. The machine has 12 hard drives. The two last ones are aggregated in a RAID1 virtual drive.
This virtual drive is the bootable device. I took some screenshot of the RAID configuration.

I use the last poodles OSP-d 2015-12-03.1 / OSP 2015-12-22.2 with the following images:
mburns/8.0/2015-12-03.1/images/deploy-ramdisk-ironic.tar
mburns/8.0/2015-12-03.1/images/ironic-python-agent.tar
mburns/8.0/2015-12-03.1/images/overcloud-full.tar

Kernel see the two drives of the RAID (sda and sdb) instead of just one virtual disk. Ironic fails to install the boot loader. The machine will restart on the old grub and fail to boot.

I tried to create a new RAM disk from the master branch of disk-imagebuild ( f389b3a04d75a35bb99ac68d13eaaa634cba7650 ) with the following command:
./bin/ramdisk-image-create -o deploy.ramdisk --ramdisk-element dracut-ramdisk ironic-agent centos7
And I get the same issue.

How reproducible:

Use "nova boot" to deploy a bare-metal node on this server.


Steps to Reproduce:
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Actual results:


Expected results:


Additional info: