Minnow (Redundant Boot Strategy for Software RAID1 in Linux) is a solution
that uses in-distro open-source software to configure and build a two-disk
RAID1 redundant boot volume in UEFI mode.

Please refer to below document for details:
http://h20564.www2.hpe.com/hpsc/doc/public/display?docId=c05316102
