DB can not open after renaming the database name

Question

Hi all,
I wanted to change the db name so i created new controlfile with trace and set it as.I have created controlfile successfully,my db opened successfully but when i shut it down and again tried it to open i saw below error message
CREATE CONTROLFILE SET DATABASE "db2" RESETLOGS NOARCHIVELOG
MAXLOGFILES 16
MAXLOGMEMBERS 3
MAXDATAFILES 100
MAXINSTANCES 8
MAXLOGHISTORY 292
LOGFILE
GROUP 1 'C:\ORACLE\PRODUCT\10.2.0\ORADATA\db2\REDO01.LOG' SIZE 50M,
GROUP 2 'C:\ORACLE\PRODUCT\10.2.0\ORADATA\db2\REDO02.LOG' SIZE 50M,
GROUP 3 'C:\ORACLE\PRODUCT\10.2.0\ORADATA\db2\REDO03.LOG' SIZE 50M
-- STANDBY LOGFILE
DATAFILE
'C:\ORACLE\PRODUCT\10.2.0\ORADATA\db2\SYSTEM01.DBF',
'C:\ORACLE\PRODUCT\10.2.0\ORADATA\db2\UNDOTBS01.DBF',
'C:\ORACLE\PRODUCT\10.2.0\ORADATA\db2\SYSAUX01.DBF',
'C:\ORACLE\PRODUCT\10.2.0\ORADATA\db2\USERS01.DBF',
'C:\ORACLE\PRODUCT\10.2.0\ORADATA\db2\DB2.DBF',
'C:\ORACLE\PRODUCT\10.2.0\ORADATA\db2\DB21.DBF',
'C:\ORACLE\PRODUCT\10.2.0\ORADATA\db2\DB211.DBF',
'C:\ORACLE\PRODUCT\10.2.0\ORADATA\db2\DB212.DBF',
'C:\ORACLE\PRODUCT\10.2.0\ORADATA\db2\DB213.DBF',
'C:\ORACLE\PRODUCT\10.2.0\ORADATA\db2\DB214.DBF',
'C:\ORACLE\PRODUCT\10.2.0\ORADATA\db2\DB215.DBF'
CHARACTER SET WE8MSWIN1252;
ALTER DATABASE OPEN RESETLOGS;
SQL> @e:\creatdbdb2.sql;
Control file created.
Database altered.
SQL> select file_name from dba_data_files;
FILE_NAME
C:\ORACLE\PRODUCT\10.2.0\ORADATA\db2\DB215.DBF
C:\ORACLE\PRODUCT\10.2.0\ORADATA\db2\DB214.DBF
C:\ORACLE\PRODUCT\10.2.0\ORADATA\db2\DB213.DBF
C:\ORACLE\PRODUCT\10.2.0\ORADATA\db2\DB212.DBF
C:\ORACLE\PRODUCT\10.2.0\ORADATA\db2\DB211.DBF
C:\ORACLE\PRODUCT\10.2.0\ORADATA\db2\DB21.DBF
C:\ORACLE\PRODUCT\10.2.0\ORADATA\db2\DB2.DBF
C:\ORACLE\PRODUCT\10.2.0\ORADATA\db2\USERS01.DBF
C:\ORACLE\PRODUCT\10.2.0\ORADATA\db2\SYSAUX01.DBF
C:\ORACLE\PRODUCT\10.2.0\ORADATA\db2\UNDOTBS01.DBF
C:\ORACLE\PRODUCT\10.2.0\ORADATA\db2\SYSTEM01.DBF
11 rows selected.
SQL> shutdown immediate;
Database closed.
Database dismounted.
ORACLE instance shut down.
SQL> startup;
ORACLE instance started.
Total System Global Area 612368384 bytes
Fixed Size 1250428 bytes
Variable Size 222301060 bytes
Database Buffers 381681664 bytes
Redo Buffers 7135232 bytes
Database mounted.
ORA-00313: open failed for members of log group 2 of thread 1
ORA-00312: online log 2 thread 1:
'C:\ORACLE\PRODUCT\10.2.0\DB_3\DATABASE\LOG2db2.ORA'
ORA-27041: unable to open file
OSD-04002: unable to open file
O/S-Error: (OS 2) The system cannot find the file specified.

Answer 1

my database is opening file now....but i have one Q i have already created init.ora for db2 database as initdb2.ora and given all controlfile location same....but why i was facing the issue? my olde initdb2.ora as below
db_cache_size=436207616
java_pool_size=4194304
large_pool_size=4194304
shared_pool_size=159383552
streams_pool_size=0
background_dump_dest='e:/db2/bdump'
compatible='10.2.0.1.0'
control_files='e:\db2\control01.ctl','e:\db2\control02.ctl','e:\db2\control03.ctl'
core_dump_dest='e:\db2\cdump'
db_block_size=8192
db_file_multiblock_read_count=16
db_name='db2'
#db_recovery_file_dest='e:\db2\flash_recovery_area'
db_recovery_file_dest_size=2147483648
dispatchers='(PROTOCOL=TCP) (SERVICE=db2XDB)'
job_queue_processes=10
log_archive_format='ARC%S_%R.%T'
open_cursors=300
pga_aggregate_target=203423744
processes=150
remote_login_passwordfile='EXCLUSIVE'
sga_target=612368384
undo_management='AUTO'
undo_tablespace='UNDOTBS1'
user_dump_dest='e:\db2\udump'