The Oracle Clusterware includes two important components: the voting disk and the
Oracle Cluster Registry (OCR). The voting disk is a file that manages information
about node membership and the OCR is a file that manages cluster and Oracle Real
Application Clusters (Oracle RAC) database configuration information

     我们可以看出votedisk盘起的是管理节点成员作用，即仲裁盘，ocr盘记录的是每个节点成员上的信息，即资源

比如gsd,ons,vip,listener,asm,database等

    以下实验为添加与删除votedisk镜像盘的步骤：

第一:添加votedisk镜像盘，建议至少三个

1.查votedisk盘

[root@p650:/crs/app/oracle/product/crs_1/bin]#./crsctl query css votedisk
 0.     0    /dev/rvotelv
located 1 votedisk(s).

2.从共享vg上创建共享lv vote2_lv

   chown oracle:dba /dev/rvote2_lv

   chmod 660 /dev/rvote2_lv

3.停止crs(两边节点)

   crsctl stop crs

4.crsctl add 命令增加vote盘

 [root@p650:/crs/app/oracle/product/crs_1/bin]#./crsctl add css votedisk '/dev/rvote2_lv' -force
Now formatting voting disk: /dev/rvote2_lv

一定要加 -force选项，要不然添加不成功,报以下错误

[root@p650:/crs/app/oracle/product/crs_1/bin]#./crsctl add css votedisk '/dev/rvote2_lv'
Cluster is not in a ready state for online disk addition

5.检查添加是否成功

[root@p650:/crs/app/oracle/product/crs_1/bin]#./crsctl query css votedisk
 0.     0    /dev/rvotelv
 1.     0    /dev/rvote2_lv

located 2 votedisk(s).

   第二:删除votedisk镜像盘

    [root@p650:/crs/app/oracle/product/crs_1/bin]#./crsctl delete css votedisk   '/dev/rvote2_lv'

3.检查删除是否成功

 [root@p650:/crs/app/oracle/product/crs_1/bin]#./crsctl query css votedisk
 0.     0    /dev/rvotelv
located 1 votedisk(s).