[grid@rac01 diag]$ 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
512 4096 1048576
10240 8532 0 8532 0 N
DATA/
MOUNTED EXTERN N
512 4096 1048576
20480 15017 0 15017 0 N
FRA/
MOUNTED NORMAL N
512 4096 1048576
3072 2146 1024 561 0 Y
OCR/
检查ocr备份情况
手动备份一个
[root@rac01 rules.d]# ocrconfig -export
/u01/app/11204/cdata/rac-cluster/backup_lastest.ocr
[root@rac01 rules.d]# ll
/u01/app/11204/cdata/rac-cluster/backup_lastest.ocr
-rw------- 1 root root 122239 Nov 17 07:20
/u01/app/11204/cdata/rac-cluster/backup_lastest.ocr
清空ocr磁盘前10M模拟损坏故障
dd if=/dev/zero of=/dev/asm-ocr-01 bs=1M count=10
dd if=/dev/zero of=/dev/asm-ocr-02 bs=1M count=10
重启crs 观察日志---坏了两块ocr盘
[cssd(13948)]CRS-1637:Unable to locate configured voting file with ID
8d933740-80eb4ff2-bfe131fa-31544751; details at (:CSSNM00020:) in
/u01/app/11204/log/rac01/cssd/ocssd.log
2025-11-17 07:49:17.617:
[cssd(13948)]CRS-1637:Unable to locate configured voting file with ID
446f8215-4e4f4f78-bf3ac759-6b3d5f9f; details at (:CSSNM00020:) in
/u01/app/11204/log/rac01/cssd/ocssd.log
2025-11-17 07:49:17.617:
[cssd(13948)]CRS-1705:Found 1 configured voting files but 2 voting files
are required, terminating to ensure data integrity; details at (:CSSNM00021:)
in /u01/app/11204/log/rac01/cssd/ocssd.log
2025-11-17 07:49:17.617:
[cssd(13948)]CRS-1656:The CSS daemon is terminating due to a fatal
error; Details at (:CSSSC00012:) in /u01/app/11204/log/rac01/cssd/ocssd.log
停掉集群资源：
[root@rac01 rules.d]# crsctl stop crs -f
CRS-2791: Starting shutdown of Oracle High Availability Services-managed
resources on 'rac01'
以独占模式启动
[root@rac01 rules.d]# crsctl start crs -excl -nocrs
CRS-4123: Oracle High Availability Services has been started.
记录集群资源状态
此时asmcmd工具并没有显示相关磁盘组信息，是因为asm实例的参数文件存储在ocr磁盘组上的，现在已经一起损毁了，需要重建pfile。
[grid@rac01 ~]$ asmcmd
ASMCMD> lsdg
重建asm参数文件
vi /home/grid/asmpfile.ora
+ASM2.asm_diskgroups='DATA','FRA'
+ASM1.asm_diskgroups='OCR','DATA','FRA'
*.asm_diskstring='/dev/*'
*.asm_power_limit=1
*.diagnostic_dest='/u01/app/grid'
*.instance_type='asm'
*.large_pool_size=12M
*.remote_login_passwordfile='EXCLUSIVE'
参数文件启动asm实例
startup nomount pfile='/home/grid/asmpfile.ora';
ASM instance started
Total System Global Area 1135747072 bytes
Fixed Size 2260728 bytes
Variable Size
1108320520 bytes
ASM Cache 25165824 bytes
此时无法自动mount OCR磁盘组，因为Ocr磁盘组超过2/3的磁盘已损坏，应该彻底将ocr盘移除后新建磁盘组
准备好三块磁盘新建ocr磁盘组
set line 200
col path for a50;
select path, header_status, os_mb, free_mb
from v$asm_disk
where header_status != 'member'
or header_status != 'former';
select name, state, type, total_mb, free_mb from v$asm_diskgroup;
创建磁盘组
create diskgroup OCR normal redundancy
disk '/dev/asm-ocr-new-01','/dev/asm-ocr-new-02','/dev/asm-ocr-new-03';
安装集群软件时使用了asmca图形化工具创建OCR盘，compatible.asm默认设置就已经为11.2，如果使用命令行创建则默认设置为10.1，所以需要手动修改磁盘组的版本
create spfile='+OCR' from pfile='/home/grid/asmpfile.ora';
alter diskgroup OCR set attribute 'COMPATIBLE.ASM'='11.2';
启动asm实例，磁盘组正常挂载
SQL> startup pfile='/home/grid/asmpfile.ora';
ASM instance started
Total System Global Area 1135747072 bytes
Fixed Size 2260728 bytes
Variable Size
1108320520 bytes
ASM Cache 25165824 bytes
ASM diskgroups mounted
ASM diskgroups volume enabled
开始还原ocr文件、恢复voting disk
[root@rac01 oracle]# ocrconfig -restore
/u01/app/11204/cdata/rac-cluster/backup_lastest.ocr
PROT-40: The specified file
'/u01/app/11204/cdata/rac-cluster/backup_lastest.ocr' has an invalid format
手动备份的ocr文件有问题，换成自动备份的文件还原
[root@rac01 bin]# ./ocrconfig -restore
/u01/app/11204/cdata/rac-cluster/backup00.ocr
恢复voting disk
[root@rac01 bin]# crsctl replace votedisk +OCR
Successful addition of voting disk 0352babe760d4fe9bf877ff52a4f4b30.
Successful addition of voting disk 28fff47157624f7bbfb40a51a0181841.
Successful addition of voting disk 02791d7cfce64fadbf600c868227b3a5.
Successfully replaced voting disk group with +OCR.
CRS-4266: Voting file(s) successfully replaced
[root@rac01 bin]# ocrcheck
Status of Oracle Cluster Registry is as follows :
Version : 3
Total space (kbytes) :
262120
Used space (kbytes) :
3100
Available space (kbytes) : 259020
ID : 1643724806
Device/File Name :
+OCR
Device/File integrity check succeeded
Device/File not configured
Device/File not configured
Device/File not configured
Device/File not configured
Cluster registry integrity check succeeded
Logical corruption check succeeded
关闭crs，重新正常启动两个节点的crs，观察日志
集群资源正常
