結：
rac啟動會根據rac中記錄的引數檔案的位置，寫入到$ORACLE_HOME/dbs/initFMISDB2.ora檔案中，然後根據檔案中的路徑，找到ASM中引數檔案，然後利用引數檔案啟動資料庫。這是正常的啟動順序。

當使用sqlplus啟動的時候，有時候會使用指定的引數檔案啟動資料庫，此時，如果該引數檔案和叢集中記錄的不一致，那麼叢集起來，但是db是無法啟動的。用startup命令啟動，會提示引數檔案不存在。即使手動修改了initFMISDB2.ora檔案，叢集重啟，該檔案會被重新寫入，根據叢集的配置。

所以，在修改引數檔案的路徑時，一定要注意，叢集中引數檔案配置和啟動的引數檔案一致。

確認叢集的配置
節點一：叢集和資料庫記錄不一致；修改確認。
fmisdb1:$ srvctl config 
 
database -d fmisdb
Database unique name: FMISDB
Database name: FMISDB
Oracle home: /u01/app/oracle/product/11.2.0/db_1
Oracle user: oracle
Spfile: +DATA/FMISDB/spfileFMISDB.ora
Domain:
Start options: open
Stop options: immediate
Database role: PRIMARY
Management policy: AUTOMATIC
Server pools: FMISDB
Database
 
 instances: FMISDB1,FMISDB2
Disk Groups: DATA
Mount point paths:
Services:
Type: RAC
Database is administrator managed

SQL> show parameter pfile

NAME TYPE VALUE
---------------------------------------
spfile string +DATA/fmisdb/spfilefmisdb1.ora

fmisdb1:/u01/app/oracle/diag/rdbms/fmisdb/FMISDB1/trace$ id
uid
 
=1101(oracle) gid=1000(oinstall) groups=1000(oinstall),1200(dba),1300(asmdba)
fmisdb1:/u01/app/oracle/diag/rdbms/fmisdb/FMISDB1/trace$ srvctl modify database -d fmisdb -p +DATA/FMISDB/spfileFMISDB1.ora
fmisdb1:/u01/app/oracle/diag/rdbms/fmisdb/FMISDB1/trace$
fmisdb1:/u01/app/oracle/diag/rdbms/fmisdb/FMISDB1/trace$
fmisdb1:/u01/app/oracle/diag/rdbms/fmisdb/FMISDB1/trace$ srvctl config database -d fmisdb
Database unique name: FMISDB
Database name: FMISDB
Oracle home: /u01/app/oracle/product/11.2.0/db_1
Oracle user: oracle
Spfile: +DATA/FMISDB/spfileFMISDB1.ora
Domain:
Start options: open
Stop options: immediate
Database role: PRIMARY
Management policy: AUTOMATIC
Server pools: FMISDB
Database instances: FMISDB1,FMISDB2
Disk Groups: DATA
Mount point paths:
Services:
Type: RAC
Database is administrator managed


節點二：確認寫入檔案和配置
fmisdb2:/u01/app/oracle/product/11.2.0/db_1/dbs$ cat initFMISDB2.ora
#SPFILE='+DATA/FMISDB/spfileFMISDB1.ora' # line added by Agent
SPFILE='+DATA/FMISDB/spfileFMISDB1.ora' # line added by Agent


fmisdb2:/u01/app/oracle/diag/rdbms/fmisdb/FMISDB2/trace$ srvctl config database -d fmisdb
Database unique name: FMISDB
Database name: FMISDB
Oracle home: /u01/app/oracle/product/11.2.0/db_1
Oracle user: oracle
Spfile: +DATA/FMISDB/spfileFMISDB1.ora
Domain:
Start options: open
Stop options: immediate
Database role: PRIMARY
Management policy: AUTOMATIC
Server pools: FMISDB
Database instances: FMISDB1,FMISDB2
Disk Groups: DATA
Mount point paths:
Services:
Type: RAC
Database is administrator managed