如何从ORACE 11G RAC中彻底清除DISK GROUP信息
两台服务器配置ORACLE 11G RAC，主要配置如下：OS： Oracle Linux Server 6.3
Grid: Oracle 11G R2 Grid 64Bit
Oracle:Oracle 11G R2 11.2.0.1.0
存储：ISCSI,创建3个LUN，CRSVOL、DATAVOL、FRAVOL，分别用作磁盘仲裁\OCR注册、数据库文件、
数据库归档。
上次因为调整存储后，服务器无法访问FRAVOL LUN,造成Oracle数据库无法启动，经修改数据库参
数文件，将数据库文件及归档整合到DATAVOL，已经可以启用两个数据库，但是启用后无法自动启
用数据库，应该是系统中还存FRAVOL磁盘组信息，CRS无法挂载这个磁盘组造成，现在想把它彻底
清掉，请问高人应该怎么做，谢谢。
系统启动后，查看CRS资源如下：
--------------------------------------------------------------------------------
NAME TARGETSTATE SERVER STATE_DETAILS
--------------------------------------------------------------------------------
--------------------------------------------------------------------------------
Cluster Resources
--------------------------------------------------------------------------------
ora.LISTENER_SCAN1.lsnr
1 ONLINEONLINE racnode1
ora.oc4j
1 OFFLINE OFFLINE
ora.racdb.db
1 ONLINEOFFLINE
2 ONLINEOFFLINE
ora.racdb.racdbsvc.svc
1 ONLINEUNKNOWN racnode2 CHECK TIMED OUT
2 ONLINEUNKNOWN racnode1 CHECK TIMED OUT
ora.racnode1.vip
1 ONLINEOFFLINE
ora.racnode2.vip
1 ONLINEONLINE racnode2
ora.scan1.vip
1 ONLINEONLINE racnode1
手动启动svc资料，显示如下错误（只截取了错误信息）：
$ crs_start ora.racdb.racdbsvc.svc
Attempting to start `ora.FRAVOL.dg` on member `racnode2`
ORA-15032: not all alterations performed
ORA-15017: diskgroup "FRAVOL" cannot be mounted
ORA-15063: ASM discovered an insufficient number of disks for diskgroup "FRAVOL"
Start of `ora.FRAVOL.dg` on member `racnode2` failed.
CRS-0215: Could not start resource 'ora.racdb.racdbsvc.svc 2 1'.
查询视图v$asm_diskgroup,也没有发现这个磁盘组，
SQL> select Group_number,name,state from v$asm_diskgroup;
GROUP_NUMBER NAME STATE
------------ ------------------------------ -----------
1 CRSDG QUIESCING
2 DATAVOL MOUNTED
手动删除
SQL> drop diskgroup FRAVOL including contents;
drop diskgroup FRAVOL including contents
*
ERROR at line 1:
ORA-15039: diskgroup not dropped
ORA-15001: diskgroup "FRAVOL" does not exist or is not mounted
强制删除，报如下错误：
SQL> drop diskgroup FRAVOL force including contents;
drop diskgroup FRAVOL force including contents
*
ERROR at line 1:
ORA-15039: diskgroup not dropped
ORA-15063: ASM discovered an insufficient number of disks for diskgroup
"FRAVOL"
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