添加磁盘组存储ocrbk报错PROT-30、PROC-50

问题描述：添加磁盘组存储ocrbk报错PROT-30、PROC-50，如下所示：
数据库：oracle 11.2.0.4 64位
系统：centos 7.9 64位
环境：rac(双节点) + dg
异常现象：
[root@hisdb1 bin]# pwd
/u01/app/11.2.0/grid/bin
[root@hisdb1 bin]# ./ocrconfig -add +orcbk
PROT-30: The Oracle Cluster Registry location to be added is not usable
PROC-50: The Oracle Cluster Registry location to be added is inaccessible on nodes hisdb1, hisdb2.
[root@hisdb1 bin]# more /etc/oracle/ocr.loc
ocrconfig_loc=+OCR
local_only=FALSE
解决过程：
查磁盘组状态
SQL> set line 999
SQL> select name,
  2         state,
  3         free_mb,
  4         required_mirror_free_mb,
  5         usable_file_mb,
  6         group_number
  7    from v$asm_diskgroup;

NAME                           STATE          FREE_MB REQUIRED_MIRROR_FREE_MB USABLE_FILE_MB GROUP_NUMBER
------------------------------ ----------- ---------- ----------------------- -------------- ------------
DATA                           MOUNTED          16490                       0          16490            1
FRA                            MOUNTED           8957                       0           8957            2
OCR                            MOUNTED           9875                       0           9875            3
OCRBK                          MOUNTED          10112                       0          10112            4
磁盘组ocrbk状态正常.经一段时间的查，发现磁盘组名写错，正确应该是“ocrbk”，却被错误的写成“orcbk”，修改后成功添加.
[root@hisdb1 bin]# ./ocrconfig -add +ocrbk
[root@hisdb1 bin]# more /etc/oracle/ocr.loc
#Device/file  getting replaced by device +ocrbk 
ocrconfig_loc=+OCR
ocrmirrorconfig_loc=+ocrbk
local_only=false

参考网址：
https://blog.csdn.net/ghostliming/article/details/50062209