Missing current redo log files

Question

hello to all
i have a question please if you can guide me.
if i lose all current redo log files (current redo log group files) how i can repair it and open
database ? (i don't have problem by missing INACTIVE redo group)
thanks

Answer 1

Hi,
>>if i lose all current redo log files (current redo log group files) how i can repair it and
open database ? (i don't have problem by missing INACTIVE redo group)Well, It depends. The database was active when the current log file was lost ? Are you using RMAN ? The database is operating in ARCHIVELOG mode or NOARCHIVEMOG mode ? Basically, an incomplete recovery is necessary when there is a loss of the current redo log files. It means that you don’t have all the redo log files up to the point of failure, so the only alternative is[b] to recover prior to the point of failure. To perform incomplete recovery after the redo log files have been lost, you do the following (if you are not using RMAN):
1) Execute a SHUTDOWN command and restore all data files (*.dbf) from most recent backup.
2) Execute a STARTUP MOUNT command to read the contents of the control file.
3) Execute a RECOVER DATABASE UNTIL CANCEL command to start the recovery process.
SQL> startup mount;
4) Execute a RECOVER DATABASE UNTIL CANCEL command to start the recovery process.
SQL> recover database until cancel;
5) Apply the necessary archived logs up to, but not including, the lost or corrupted log.
6) Open the database and reset the log files.
SQL> alter database open resetlogs;
7) Shut down the database.
SQL> shutdown normal;
8) Take a full cold backup
In resume, for more information, take a look at [url http://download-west.oracle.com/docs/cd/B19306_01/backup.102/b14191/recoscen008.htm#sthref1872]Recovering After the Loss of Online Redo Log Files: Scenarios
Cheers
Legatti