Recover from corruption of single control file

RECOVER CONTROL FILE; MULTIPLEXED COPIES OF CONTROL FILE EXISTS

SQL> /
alter system switch logfile
*
ERROR at line 1:
ORA-00227: corrupt block detected in control
file: (block , # blocks )

Hex dump of (file 0, block 1) in trace file c:\oracle\product\10.2.0\admin\orcln
ew\bdump\orclnew_lgwr_3352.trc
Corrupt block relative dba: 0x00000001 (file 0, block 1)
Fractured block found during control file header read
Data in bad block:
type: 0 format: 0 rdba: 0x00000000
last change scn: 0x0000.00000000 seq: 0x0 flg: 0x00
spare1: 0x0 spare2: 0x0 spare3: 0x2400
consistency value in tail: 0x00000000
check value in block header: 0x0
block checksum disabled
Tue Oct 13 11:34:08 2009
Errors in file c:\oracle\product\10.2.0\admin\orclnew\bdump\orclnew_lgwr_3352.tr
c:
ORA-00202: control file: 'C:\ORACLE\PRODUCT\10.2.0\ORADATA\ORCLNEW\CONTROL01.CTL
'

Tue Oct 13 11:34:09 2009
Errors in file c:\oracle\product\10.2.0\admin\orclnew\bdump\orclnew_lgwr_3352.tr
c:
ORA-00227: corrupt block detected in control file: (block 1, # blocks 1)
ORA-00202: control file: 'C:\ORACLE\PRODUCT\10.2.0\ORADATA\ORCLNEW\CONTROL01.CTL
'

LGWR: terminating instance due to error 227
Tue Oct 13 11:34:09 2009
Errors in file c:\oracle\product\10.2.0\admin\orclnew\bdump\orclnew_q001_3532.tr
c:
ORA-00227: corrupt block detected in control file: (block , # blocks )

Tue Oct 13 11:34:09 2009
Errors in file c:\oracle\product\10.2.0\admin\orclnew\bdump\orclnew_pmon_6136.tr
c:
ORA-00227: corrupt block detected in control file: (block , # blocks )

Tue Oct 13 11:34:10 2009
Errors in file c:\oracle\product\10.2.0\admin\orclnew\bdump\orclnew_j000_716.trc
:
ORA-00227: corrupt block detected in control file: (block , # blocks )

Tue Oct 13 11:34:10 2009
Errors in file c:\oracle\product\10.2.0\admin\orclnew\bdump\orclnew_dbw0_5260.tr
c:
ORA-00227: corrupt block detected in control file: (block , # blocks )

Tue Oct 13 11:34:10 2009
Errors in file c:\oracle\product\10.2.0\admin\orclnew\bdump\orclnew_psp0_2336.tr
c:
ORA-00227: corrupt block detected in control file: (block , # blocks )

Tue Oct 13 11:34:10 2009
Errors in file c:\oracle\product\10.2.0\admin\orclnew\bdump\orclnew_mman_4128.tr
c:
ORA-00227: corrupt block detected in control file: (block , # blocks )

Tue Oct 13 11:34:14 2009
Errors in file c:\oracle\product\10.2.0\admin\orclnew\bdump\orclnew_ckpt_128.trc
:
ORA-00227: corrupt block detected in control file: (block , # blocks )

Tue Oct 13 11:34:18 2009
Errors in file c:\oracle\product\10.2.0\admin\orclnew\bdump\orclnew_reco_4656.tr
c:
ORA-00227: corrupt block detected in control file: (block , # blocks )

Tue Oct 13 11:34:18 2009
Errors in file c:\oracle\product\10.2.0\admin\orclnew\bdump\orclnew_smon_948.trc
:
ORA-00227: corrupt block detected in control file: (block , # blocks )

COPY CONTROL02.CTL TO CONTROL01.CTL

sphilip@seadba01 /cygdrive/c/oracle/product/10.2.0/oradata/orclnew
$ ls -ltr CONTROL*
-rwx------+ 1 sphilip ???????? 7749632 Oct 13 11:34 CONTROL03.CTL
-rwx------+ 1 sphilip ???????? 7749632 Oct 13 11:34 CONTROL02.CTL
-rwx------+ 1 sphilip ???????? 4644319 Oct 13 11:34 CONTROL01.CTL

sphilip@seadba01 /cygdrive/c/oracle/product/10.2.0/oradata/orclnew
$ cp CONTROL02.CTL CONTROL01.CTL

sphilip@seadba01 /cygdrive/c/oracle/product/10.2.0/oradata/orclnew
$ ls -ltr CONTROL*
-rwx------+ 1 sphilip ???????? 7749632 Oct 13 11:34 CONTROL03.CTL
-rwx------+ 1 sphilip ???????? 7749632 Oct 13 11:34 CONTROL02.CTL
-rwx------ 1 sphilip mkgroup-l-d 7749632 Oct 13 11:37 CONTROL01.CTL

sphilip@seadba01 /cygdrive/c/oracle/product/10.2.0/oradata/orclnew

SQL> startup
ORACLE instance started.

Total System Global Area 1073741824 bytes
Fixed Size 1294680 bytes
Variable Size 461377192 bytes
Database Buffers 603979776 bytes
Redo Buffers 7090176 bytes
Database mounted.
Database opened.