zap all devices before install coreos
zap all devices before install coreos

gaoyw1/sextant,k8sp/sextant,k8sp/sextant,JunfeiYang/sextant,zhengbo0/sextant,gaoyw1/sextant,JunfeiYang/sextant,k8sp/sextant,JunfeiYang/sextant,zhengbo0/sextant,zhengbo0/sextant,k8sp/sextant,gaoyw1/sextant