What will heppen if redo logs at os level get deleted

Question

Friends,
need 1 answer about the query: what will heppen if redo logs at os level get deleted.

Answer 1

how can i find where are my multiplexed redo logs, so that i can copy it from there
SQL> shutdown abort                       
ORACLE instance shut down.                
SQL> startup mount                        
ORACLE instance started.                  
Total System Global Area  534462464 bytes 
Fixed Size                  2256912 bytes 
Variable Size             398462960 bytes 
Database Buffers          125829120 bytes 
Redo Buffers                7913472 bytes 
Database mounted.                         
SQL> select * from v$logfile              
  2  ;                                    
    GROUP# STATUS  TYPE                   
MEMBER                                    
IS_                                       
         3         ONLINE                 
C:\O\ORADATA\XE\REDO03.LOG                
NO                                        
         2         ONLINE                 
C:\O\ORADATA\XE\REDO02.LOG                
NO                                        
    GROUP# STATUS  TYPE                   
MEMBER                                    
IS_                                       
         1         ONLINE                 
C:\O\ORADATA\XE\REDO01.LOG                
NO                                         However, Oracle knows about the multiplexing, so if your logs were multiplexed properly (using redo log members), Oracle would already have known about them and identified that there was one available.
Just goes to show you (if this is, in fact what you did), don't just go blindly deleting files that have a ".LOG" extension.