Remove MBR with microkernel

[Chung Chung]

Is it possible to set up microkernel to remove the MBR on the local hard drive before a system reboot?

Basically, I have this situation:

. Machine A is running Debian and I need to switch its OS to Redhat.

. All the tags and policies are updated so Machine A knows it has to install Redhat.

. After I run razor reinstall-node, I force machine A to do a network boot.  ipxe get called 

and microkernel gets installed.  All the necessary setting in razor are now updated for that node. 

. At the end of microkernel run, machine A reboots itself.  At this time, machine A will still 

boot back to Debian, unless we force another network boot.

Is there a way to remove the MBR on machine A so it will boot from the network in the next boot

instead of the local hard drive?   Or is there some other way to setup a new OS for the same node?

Thanks!

Chung