For a database in noarchivelog mode, you do not have to restore all Oracle files if no redo log file has been over-written since the last backup.
- There are two redo logs for a database
- A closed database backup was taken at log sequence 144.
- While the database was at log sequence 145, datafile 2 was lost
Since log sequence 144 has not been over-written, just datafile number 2 can be restored and recovered manually.
My question is: after restoring datafile #2, it has log sequence 144 while the other files have 145. Do I need to mount it and use "recover" command to bring it up to 145, or it is done automatically when I do "startup"?