Oracle 11g RAC ASM磁盘全部丢失后的恢复
Oracle 11g RAC ASM磁盘全部丢失后的恢复，Oracle 11.2.0.3 RAC ON Oracle Linux 6 x86_64，只有一个ASM外部冗余磁盘组mdash;m
一、环境描述
（1）Oracle 11.2.0.3 RAC ON Oracle Linux 6 x86_64，只有一个ASM外部冗余磁盘组——DATA；
（2）OCR，VOTEDISK，DATAFILE，CONTROLFILE，SPFILE全部位于这个磁盘组上；
（1）存储故障导致ASM磁盘丢失。
（2）CRS因为OCR和VOTEDISK的丢失，除了OHAS还联机外，CLUSTERWARE服务都已经停止。
（1）RMAN备份：包括controlfile，，database，spfile，archivelog，
（2）OCR备份：没有进行过人工备份，在$CRS_HOME/cdata目录下有CRS自动备份文件。
说明：准使用CRS自动备份的文件恢复OCR，使用RMAN备份来恢复数据库；准备恢复数据的同时，调整ASM磁盘组，将OCR，VOTEDISK同数据库文件分开存放。
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4.1 恢复OCR和VOTEDISK(1) 在所有RAC节点上停止CRS服务
[root@rac1 ~]# crsctl stop has -f CRS-2791: Starting shutdown of Oracle High Availability Services-managed resources on 'rac1' CRS-2673: Attempting to stop 'ora.mdnsd' on 'rac1' CRS-2673: Attempting to stop 'ora.crf' on 'rac1' CRS-2677: Stop of 'ora.mdnsd' on 'rac1' succeeded CRS-2677: Stop of 'ora.crf' on 'rac1' succeeded CRS-2673: Attempting to stop 'ora.gipcd' on 'rac1' CRS-2677: Stop of 'ora.gipcd' on 'rac1' succeeded CRS-2673: Attempting to stop 'ora.gpnpd' on 'rac1' CRS-2677: Stop of 'ora.gpnpd' on 'rac1' succeeded CRS-2793: Shutdown of Oracle High Availability Services-managed resources on 'rac1' has completed CRS-4133: Oracle High Availability Services has been stopped.
[root@rac2 ~]# crsctl stop has -f CRS-2791: Starting shutdown of Oracle High Availability Services-managed resources on 'rac2' CRS-2673: Attempting to stop 'ora.mdnsd' on 'rac2' CRS-2673: Attempting to stop 'ora.crf' on 'rac2' CRS-2677: Stop of 'ora.mdnsd' on 'rac2' succeeded CRS-2677: Stop of 'ora.crf' on 'rac2' succeeded CRS-2673: Attempting to stop 'ora.gipcd' on 'rac2' CRS-2677: Stop of 'ora.gipcd' on 'rac2' succeeded CRS-2673: Attempting to stop 'ora.gpnpd' on 'rac2' CRS-2677: Stop of 'ora.gpnpd' on 'rac2' succeeded CRS-2793: Shutdown of Oracle High Availability Services-managed resources on 'rac2' has completed CRS-4133: Oracle High Availability Services has been stopped.
(2) 在一个节点上以NOCRS方式启动CRS，此操作会启动ASM实例。
[root@rac1 ~]# crsctl start crs -excl -nocrs CRS-4123: Oracle High Availability Services has been started. CRS-2672: Attempting to start 'ora.mdnsd' on 'rac1' CRS-2676: Start of 'ora.mdnsd' on 'rac1' succeeded CRS-2672: Attempting to start 'ora.gpnpd' on 'rac1' CRS-2676: Start of 'ora.gpnpd' on 'rac1' succeeded CRS-2672: Attempting to start 'ora.cssdmonitor' on 'rac1' CRS-2672: Attempting to start 'ora.gipcd' on 'rac1' CRS-2676: Start of 'ora.cssdmonitor' on 'rac1' succeeded CRS-2676: Start of 'ora.gipcd' on 'rac1' succeeded CRS-2672: Attempting to start 'ora.cssd' on 'rac1' CRS-2672: Attempting to start 'ora.diskmon' on 'rac1' CRS-2676: Start of 'ora.diskmon' on 'rac1' succeeded CRS-2676: Start of 'ora.cssd' on 'rac1' succeeded CRS-2679: Attempting to clean 'ora.cluster_interconnect.haip' on 'rac1' CRS-2672: Attempting to start 'ora.ctssd' on 'rac1' CRS-2681: Clean of 'ora.cluster_interconnect.haip' on 'rac1' succeeded CRS-2672: Attempting to start 'ora.cluster_interconnect.haip' on 'rac1' CRS-2676: Start of 'ora.ctssd' on 'rac1' succeeded CRS-2676: Start of 'ora.cluster_interconnect.haip' on 'rac1' succeeded CRS-2672: Attempting to start 'ora.asm' on 'rac1' CRS-2676: Start of 'ora.asm' on 'rac1' succeeded
(3) 新添加了三块磁盘，已经使用UDEV进行了绑定，查看磁盘状态。
[root@rac1 ~]# su - grid [grid@rac1 ~]$ sqlplus / as sysasm SQL*Plus: Release 11.2.0.3.0 Production on Fri Jul 5 17:41:49 2013 Copyright (c) 1982, 2011, Oracle. All rights reserved. Connected to: Oracle Database 11g Enterprise Edition Release 11.2.0.3.0 - 64bit Production With the Real Application Clusters and Automatic Storage Management options SQL> select group_number group#, disk_number disk#, OS_MB, state, path, header_status from v$asm_disk order by 1,2; GROUP# DISK# OS_MB STATE PATH HEADER_STATUS ---------- ---------- ---------- ---------- -------------------- ---------------------- 0 0 1024 NORMAL /dev/asm-diskc CANDIDATE 0 1 5120 NORMAL /dev/asm-diskd CANDIDATE 0 2 20480 NORMAL /dev/asm-diskb CANDIDATE
(4) 创建三个磁盘组，SYSTEMDG给CRS使用，用于存放OCR，VOTEDISK和ASM实例的SPFILE。其余两个给ORACLE使用，DATADG用于存放datafile，controlfile，redolog，spfile；ARCLOGDG存放archivelog。
SQL> create diskgroup SYSTEMDG external redundancy 2 disk '/dev/asm-diskc' 3 ATTRIBUTE 'compatible.rdbms' = '11.2','compatible.asm' = '11.2'; Diskgroup created. SQL> create diskgroup DATADG external redundancy 2 disk '/dev/asm-diskb' 3 ATTRIBUTE 'compatible.rdbms' = '11.2','compatible.asm' = '11.2'; Diskgroup created. SQL> create diskgroup ARCLOGDG external redundancy 2 disk '/dev/asm-diskd' 3 ATTRIBUTE 'compatible.rdbms' = '11.2','compatible.asm' = '11.2'; Diskgroup created.
(5) 准备恢复OCR和VOTEDISK，/etc/oracle/ocr.loc中记录了OCR路径，修改ocrconfig_loc的值，以便将OCR恢复到新的磁盘组中。
[root@rac1 ~]# more /etc/oracle/ocr.loc ocrconfig_loc=+DATA local_only=FALSE [root@rac1 ~]# vi /etc/oracle/ocr.loc ocrconfig_loc=+SYSTEMDG local_only=FALSE
(6) 恢复OCR
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