【RAC搭建报错】You need disks from at least two different failure groups, excluding quorum disks and quorum failure groups, to create a Disk Group with normal redundancy

报错：

You need disks from at least two different failure groups, excluding quorum disks and quorum failure groups, to create a Disk Group with normal redundancy

解决方案：

Normal至少需要两个盘，所以一个盘的话，选External