System datafile corruption

Question

good morning all
What if in system datafile some blocks are corrupted in scenerio as below(db in noarchive mode but backup available-point in time recovery not important,data loss tolerated but want faster approach without shutting down db prefrably)
oracle 10g release 2
1)have cold backup /rman of few days old before corruption
2)can i use bmr of rman or export system from this server import on anoter server and export and import back on this server
3)or can i restore backup/rman of this db on other server,export system and import this on server where
system.dbf is corrupted
4)OR should i restore whole rman backup and replace whole db(point in time recovery not important here)
which approach is best
thanks

Answer 1

for the following points :
1)have cold backup /rman of few days old before corruptionyou have to remove the existing C/R/D files and restore those files from the last backup and start the database.
2)can i use bmr of rman or export system from this server import on anoter server and export and import back on this serverTaking export is possible but not sure whether there would be any problem while taking any export and also during the import as well.
3)or can i restore backup/rman of this db on other server,export system and import this on server where system.dbf is corrupted Its same as your second point but you are just doing it remotely
4)OR should i restore whole rman backup and replace whole db(point in time recovery not important here) which approach is bestThis point is right because the database is not in archivelog mode...
Cheers!