Finding datafile numbers

Hi,
Can anybody help me find the datafile numbers for the datafile. V$datafile will not help because the datafiles I'm looking for have been dropped from the existing database. I have the backups and the trace files which has the right datafiles. So I need to get the datafile numbers from either the backup or the trace file.
Thanks,
Mamata

Why do you need to know the file numbers for deleted files? What is it that you intend to try?
Way back when we had a sytem that would 'lose' control file information and the fix was to create a new control file. We would back it up to trace and the file list would would include slots for no longer existing files. You might try looking in the trace to see if it provides anything you need.
Do you have backups of the control file? We actually run a job to back it up to trace every day. If we take OS backups of the trace directories then we have lists of our files going back a couple of months. If you do anything like this then you may have the information you want in a form you just have not thought about yet.
If you have a OS copy you could run strings on it to get the list of files out.
HTH -- Mark D Powell --

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id int,
store varchar2(20),
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INSERT INTO STORE_TRACKING (SELECT 2, 'STORE X', 101 FROM DUAL );
INSERT INTO STORE_TRACKING (SELECT 3, 'STORE X', 102 FROM DUAL );
INSERT INTO STORE_TRACKING (SELECT 4, 'STORE X', 103 FROM DUAL );
INSERT INTO STORE_TRACKING (SELECT 5, 'STORE X', 104 FROM DUAL );
INSERT INTO STORE_TRACKING (SELECT 6, 'STORE X', 105 FROM DUAL );
INSERT INTO STORE_TRACKING (SELECT 7, 'STORE X', 107 FROM DUAL );
INSERT INTO STORE_TRACKING (SELECT 8, 'STORE X', 108 FROM DUAL );
INSERT INTO STORE_TRACKING (SELECT 9, 'STORE X', 109 FROM DUAL );
INSERT INTO STORE_TRACKING (SELECT 10, 'STORE X', 110 FROM DUAL);
INSERT INTO STORE_TRACKING (SELECT 11, 'STORE X', 112 FROM DUAL);
INSERT INTO STORE_TRACKING (SELECT 12, 'STORE X', 113 FROM DUAL);
INSERT INTO STORE_TRACKING (SELECT 13, 'STORE X', 114 FROM DUAL);
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