RAC数据库grid的CRS磁盘dismount造成的CRS进程无法启动问题

问题：crs asm盘没有挂载问题

rx9900b@grid[/home/grid]crsctl status res -t
CRS-4535: Cannot communicate with Cluster Ready Services
CRS-4000: Command Status failed, or completed with errors.

问题分析：

问题查看过程
rx9900b@grid[/] ocrcheck
rx9900b@grid[/] crsctl query css votedisk
1、查看crs进程日志
rx9900b@grid[/u01/app/grid/11.2.0/log/rx9900b/crsd]tail -n 20 /u01/app/grid/11.2.0/log/rx9900b/crsd/crsd.log
2021-11-17 13:07:12.711: [  OCRASM][1]ASM Error Stack : 
2021-11-17 13:07:12.791: [  OCRASM][1]proprasmo: kgfoCheckMount returned [6]
2021-11-17 13:07:12.791: [  OCRASM][1]proprasmo: The ASM disk group OCR is not found or not mounted               ----->ocr磁盘每找到
2021-11-17 13:07:12.792: [  OCRRAW][1]proprioo: Failed to open [+OCR]. Returned proprasmo() with [26]. Marking location as UNAVAILABLE.
2021-11-17 13:07:12.792: [  OCRRAW][1]proprioo: No OCR/OLR devices are usable
SQL> show parameter dump
NAME                                 TYPE        VALUE
------------------------------------ ----------- ------------------------------
background_core_dump                 string      partial
background_dump_dest                 string      /u01/app/gridbase/diag/asm/+asm/+ASM2/trace
2、查看asm实例日志
tail -n 10000 /u01/app/gridbase/diag/asm/+asm/+ASM2/trace/alert_+ASM2.log|more
SUCCESS: diskgroup OCR was dismounted
SUCCESS: alter diskgroup OCR dismount force /* ASM SERVER:342992784 */                                          ----->ocr备强制dismount
SUCCESS: ASM-initiated MANDATORY DISMOUNT of group OCR
Wed Nov 17 12:06:47 2021
NOTE: diskgroup resource ora.OCR.dg is offline
Wed Nov 17 12:06:47 2021
Errors in file /u01/app/gridbase/diag/asm/+asm/+ASM2/trace/+ASM2_ora_20678.trc:

问题处理：

rx9900b@grid[/home/grid]asmcmd
ASMCMD [+] > lsdg
State    Type    Rebal  Sector  Block       AU  Total_MB  Free_MB  Req_mir_free_MB  Usable_file_MB  Offline_disks  Voting_files  Name
MOUNTED  EXTERN  N        1024   4096  1048576   2297856  2127098                0         2127098              0          N  ARCHDG/
MOUNTED  EXTERN  N        1024   4096  1048576  13065216   253437                0          253437              0          N  RKYWDG/
MOUNTED  EXTERN  N        1024   4096  1048576  20454400  4558159                0         4558159              0          N  RXZWDG/

sqlplus / as sysdba
SQL> set linesize 300
SQL> set pagesize 100
SQL> col path format a40
SQL> col name format a20
SQL> col state format a10
SQL> select path,name,state,total_mb,free_mb from v$asm_disk;

SQL> select name,state from v$asm_diskgroup;

NAME                 STATE
-------------------- ----------
ARCHDG               MOUNTED
OCR                  DISMOUNTED
RKYWDG               MOUNTED
RXZWDG               MOUNTED
SQL> alter diskgroup OCR mount;  #挂载asm磁盘
Diskgroup altered.

SQL> select name,state from v$asm_diskgroup;

NAME                 STATE
-------------------- ----------
ARCHDG               MOUNTED
OCR                  MOUNTED
RKYWDG               MOUNTED
RXZWDG               MOUNTED

启动crs

rx9900b@root[/]/u01/app/grid/11.2.0/bin/crsctl start res ora.crsd -init
CRS-2672: Attempting to start 'ora.crsd' on 'rx9900b'
CRS-2676: Start of 'ora.crsd' on 'rx9900b' succeeded
rx9900b@root[/]/u01/app/grid/11.2.0/bin/crsctl check crs
CRS-4638: Oracle High Availability Services is online
CRS-4535: Cluster Ready Services is online
CRS-4529: Cluster Synchronization Services is online
CRS-4533: Event Manager is online