利用Oracle RAC 11gR2 新特性renamedg来更改diskgroup name

AIX7.1 + 双节点Oracle Rac 11.2.0.3，由于此套Rac并非自己部门安装，是开发部安装，现交由运维部分来管理，客户需要要将asm di

交代环境：
aix7.1 + 双节点oracle rac 11.2.0.3

由于此套Rac并非自己部门安装，是开发部安装，现交由运维部分来管理，客户需要要将asm  diskgroup name 安装部门规范来命令。遂需要将oasmdgdata1更改为datadg。
幸好Oracle的版本是11gR2，在11gR2中，Oracle有一项新特性，可以直接使用renamedg命令更改diskgroup的名称。

下面是具体的操作步骤。

grid@sundb01:/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  NORMAL  N        512  4096  1048576    358400  358192                0          179096              0            N  OASMDGDATA01/
MOUNTED  NORMAL  N        512  4096  1048576    15360    14434            5120            4657              0            Y  OCRDG/
ASMCMD> umount oasmdgdata01
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  NORMAL  N        512  4096  1048576    15360    14434            5120            4657              0            Y  OCRDG/

grid@sundb01:/home/grid>renamedg -help
NOTE: No asm libraries found in the system

Parsing parameters..
phase                          Phase to execute,
                                (phase=ONE|TWO|BOTH), default BOTH

dgname                          Diskgroup to be renamed

newdgname                      New name for the diskgroup

config                          intermediate config file

check                          just check-do not perform actual operation,
                                (check=TRUE/FALSE), default FALSE

confirm                        confirm before committing changes to disks,
                                (confirm=TRUE/FALSE), default FALSE

clean                          ignore errors,
                                (clean=TRUE/FALSE), default TRUE

asm_diskstring                  ASM Diskstring (asm_diskstring='discoverystring',
                                'discoverystring1' ...)

verbose                        verbose execution,
                                (verbose=TRUE|FALSE), default FALSE

keep_voting_files              Voting file attribute,
                                (keep_voting_files=TRUE|FALSE), default FALSE

利用renamedg来更改diskgroup的名称：
grid@sundb01:/home/grid>renamedg phase=both dgname=oasmdgdata01 newdgname=datadg verbose=true
NOTE: No asm libraries found in the system

Parsing parameters..

Parameters in effect:

        Old DG name      : OASMDGDATA01
        New DG name          : DATADG
        Phases              :
                Phase 1
                Phase 2
        Discovery str        : 
        Clean              : TRUE
        Raw only          : TRUE
renamedg operation: phase=both dgname=oasmdgdata01 newdgname=datadg verbose=true
Executing phase 1
Discovering the group
Performing discovery with string:
Identified disk UFS:/dev/rhdisk2 with disk number:1 and timestamp (33002374 -296274944)
Identified disk UFS:/dev/rhdisk1 with disk number:0 and timestamp (33002374 -296274944)
Checking for hearbeat...
Re-discovering the group
Performing discovery with string:
Identified disk UFS:/dev/rhdisk2 with disk number:1 and timestamp (33002374 -296274944)
Identified disk UFS:/dev/rhdisk1 with disk number:0 and timestamp (33002374 -296274944)
Checking if the diskgroup is mounted or used by CSS
Checking disk number:1
Checking disk number:0
Generating configuration file..
Completed phase 1
Executing phase 2
Looking for /dev/rhdisk2
Modifying the header
Looking for /dev/rhdisk1
Modifying the header
Completed phase 2
Terminating kgfd context 110285ba0
grid@sundb01:/home/grid>
grid@sundb01:/home/grid>sqlplus / as sysasm

SQL*Plus: Release 11.2.0.3.0 Production on Fri Oct 10 12:33:31 2014

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 name,state from v$asm_diskgroup;