[root@maclean1 ~]# srvctl modify instance -d mac -instance MAC_1 -node maclean1

[root@maclean1 ~]# srvctl modify instance -d mac -instance MAC_2 -node maclean2

[root@maclean1 ~]# srvctl stop database -d MAC

[root@maclean1 ~]# srvctl start database -d MAC