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

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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：

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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：

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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