Booting Mixing

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For controller selection -> ctrl + H

Bus level 2 is the internal raid array.

Bus level 3 is external raid array.

If not booting up, install grub on level 2 ie. /dev/sda using centos 5.x boot CD and reboot the machine.

On the reboot, select F6 for the boot menu selection and select the Bus level 2 raid.