How to Perform Recovery in Database Control on tablespace?

Hi,
I am runnig 10gR2 on Windows XP SP 2.
I have taken backup of my nonsystem tablespace by using Database Control.
Now to test it I dropped tablespace.
Logged in as sys on Database Control:
Maintenance->Perform Recovery->
Object Level Recovery
Here in Object Type I choosed Tablespace from the dropdown
But what do I choose in Operation Type? There are three choises:
- Recover to current time or a previous point-in-time
- Restore tablespaces
- Recover from previously restored tablespaces
And as I said, I have taken backup of my whole tablespace...
Thanks

Hi Werner,
thanks again, but I still would like to perform backup of my tablespace.
Now I understood, that to drop a tablespace was an error. OK.
Next try:
Step 1:
CREATE TABLESPACE TEST_TS DATAFILE
'C:\ORACLE\ORADATA\ORCL\TEST_01.DBF' SIZE 1M AUTOEXTEND ON,
'C:\ORACLE\ORADATA\ORCL\TEST_02.DBF' SIZE 1M AUTOEXTEND ON;
Step 2:
CREATE TABLE TEST_TBL (
NAME VARCHAR2(10))
TABLESPACE TEST_TS;
Step 3:
INSERT INTO TEST_TBL VALUES('DB2');
Step 4:
COMMIT;
Step 5:
I have done backup of newly created tablespace TEST_TS via Database Control.
Step 6:
shutdown database;
Step 7:
I have manually renamed datafile TEST_01.DBF to TEST_01_.DBF
Step 8:
Now I have started database and have following entries in alert.log:
Errors in file c:\oracle\oracle\product\10.2.0\db_1\admin\orcl\bdump\orcl_dbw0_4124.trc:
ORA-01157: cannot identify/lock data file 6 - see DBWR trace file
ORA-01110: data file 6: 'C:\ORACLE\ORADATA\ORCL\TEST_01.DBF'
ORA-27041: unable to open file
OSD-04002: unable to open file
O/S-Error: (OS 2) The system cannot find the file specified.
ORA-1157 signalled during: alter database open...
Which is correct. Oracle can not find the datafile I have renamed.
Step 9:
Now I thought I could be able to access Backup/Recovery Page in Database Control,
but all I can reach is 'Recovery Settings'
Do I need to go in open stage first to perfor recovery?
What needs to be done in Step 9? Do I have to drop my
ALTER DATABASE DATAFILE 'C:\ORACLE\ORADATA\ORCL\TEST_01.DBF' OFFLINE DROP;
alter database open;
Go to Database Control and try it out?
Thanks

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