Rename Diskgroup having OCR , Vote File , ASM SPILE [ID 1335975.1]
适用于11R2；
11R2提供renamedg，可在磁盘组dismount时将其重命名；如果该磁盘组包含OCR/vote file，则dismount前需将其迁移至中间磁盘；

大致思路如下：
创建一个临时磁盘组temp，将OCR/vote file迁移至此；
将spfile也迁移到temp，重启CRS；
卸载并重命名原磁盘组，并重新加载；
将ocr/vote file/spfile迁回，重启CRS；

创建临时磁盘组
create diskgroup TEMP normal redundancy
disk 'ORCL:DISK4' ,'ORCL:DISK5' ,'ORCL:DATA4' ,'ORCL:DATA6'
attribute 'compatible.rdbms'='11.2.0.0', 'compatible.asm'='11.2.0.0', 'au_size'='4M';

迁移ocr/vote file
$ORACLE_HOME/bin/bin/ocrconfig -add +TEMP
$ORACLE_HOME/bin/bin/ocrconfig -delete +DATA
$ORACLE_HOME/bin/crsctl replace votedisk +TEMP
完成后调用ocrcheck检查完整性

迁移spfile

重启CRS
crsctl stop crs
crsctl start crs

重命名磁盘组
alter diskgroup data dismount; renamedgphase=both dgname=DATA newdgname=CRS verbose=true
输出如下
Parsing parameters..
Parameters in effect:
Old DG name : DATA
New DG name : CRS
Phases :
Phase 1
Phase 2
Discovery str : (null)
Clean : TRUE
Raw only : TRUE
renamedg operation: phase=both dgname=DATA newdgname=CRS verbose=true
Executing phase 1
Discovering the group
Performing discovery with string:
Identified disk ASM:/opt/oracle/extapi/32/asm/orcl/1/libasm.so:ORCL:DISK1 with disk number:0 and timestamp (32955539 -2120261632)
Identified disk ASM:/opt/oracle/extapi/32/asm/orcl/1/libasm.so:ORCL:DISK2 with disk number:1 and timestamp (32955539 -2120261632)
Identified disk ASM:/opt/oracle/extapi/32/asm/orcl/1/libasm.so:ORCL:DISK3 with disk number:2 and timestamp (32955539 -2120261632)
Identified disk ASM:/opt/oracle/extapi/32/asm/orcl/1/libasm.so:ORCL:DISK6 with disk number:5 and timestamp (32955539 -2120261632)
Checking for hearbeat...
Re-discovering the group
Performing discovery with string:
Identified disk ASM:/opt/oracle/extapi/32/asm/orcl/1/libasm.so:ORCL:DISK1 with disk number:0 and timestamp (32955539 -2120261632)
Identified disk ASM:/opt/oracle/extapi/32/asm/orcl/1/libasm.so:ORCL:DISK2 with disk number:1 and timestamp (32955539 -2120261632)
Identified disk ASM:/opt/oracle/extapi/32/asm/orcl/1/libasm.so:ORCL:DISK3 with disk number:2 and timestamp (32955539 -2120261632)
Identified disk ASM:/opt/oracle/extapi/32/asm/orcl/1/libasm.so:ORCL:DISK6 with disk number:5 and timestamp (32955539 -2120261632)
Checking if the diskgroup is mounted or used by CSS
Checking disk number:0
Checking disk number:1
Checking disk number:2
Checking disk number:5
Generating configuration file..
Completed phase 1
Executing phase 2
Looking for ORCL:DISK1
Modifying the header
Looking for ORCL:DISK2
Modifying the header
Looking for ORCL:DISK3
Modifying the header
Looking for ORCL:DISK6
Modifying the header
Completed phase 2
Terminating kgfd context 0xb7ee8050

重新加载磁盘组并迁回OCR
alter diskgroup CRS mount
$ORACLE_HOME/bin/ocrconfig -add +CRS
$ORACLE_HOME/bin/ocrconfig -delete +TEMP
$ORACLE_HOME/bin/crsctl replace votedisk +CRS

迁回spfile并重启CRS

删除temp磁盘组并将其信息从集群中移除
alter diskgroup TEMP dismount;
drop diskgroup temp including contents;
srvctl remove diskgroup -g data
srvctl remove diskgroup -g TEMP

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