cd $GRID_HOME/crs/install
$GRID_HOME/perl/bin/perl rootcrs.pl -deconfig -force
# $GRID_HOME/crs/install/rootcrs.sh -deconfig -force    # rootcrs.pl로 deconfig가 되지 않을 경우 (버그)

cd $GRID_HOME/crs/install
$GRID_HOME/perl/bin/perl rootcrs.pl -deconfig -force -lastnode
# $GRID_HOME/crs/install/rootcrs.sh -deconfig -force -lastnode    # rootcrs.pl로 deconfig가 되지 않을 경우 (버그)

rm -fr /etc/oraInst.loc
rm -fr /etc/oracle
rm -fr /etc/oracleafd.conf
rm -fr /etc/oratab
rm -fr /etc/init.d/init.tfa
rm -fr /etc/init.d/afd
rm -fr /etc/init.d/ohasd
rm -fr /etc/init.d/init.ohasd
rm -fr $ORACLE_BASE
rm -fr $GRID_HOME

oracleasm deletedisk CRS1      # ASM 디스크명 입력 (모든 디스크 삭제)
fdisk /dev/sdb                 # 디스크명 입력하여 파티션 삭제 : d, w (모든 디스크 파티션 삭제)

dd if=/dev/zero of=/dev/sdb bs=1024k count=1000  # Grid나 DB에서 사용한 모든 디스크에 적용