1，ocr,votedisk分2个磁盘组存放。
2，建议设置_asm_storagemaysplit 。
3，个人认为，通过pts决定一个节点的存储的(GMON terminating the instance due to storage split in grp)。
4，测试发现，在2个节点集群中，在发生存储链路故障的时候，先启动的节点asm存活。
prod01 asm log:
Tue Sep 17 14:37:57 2019
WARNING: Read Failed. group:1 disk:1 AU:1 offset:0 size:4096
WARNING: Read Failed. group:1 disk:1 AU:1 offset:4096 size:4096
ERROR: no read quorum in group: required 2, found 0 disks
WARNING: could not find any PST disk in grp 1
ERROR: GMON terminating the instance due to storage split in grp 1
GMON (ospid: 37538): terminating the instance due to error 1092
