If i swithc from archivelog to noarchivelog and i stop my archiver .
After one or two days if i again switch to archivelog mode .
i had taken a full closed backup and started with log_archive_start = true. my V$log_history shows all log history though i had gone to noarchive and come back to archivelog mode. Which archived log do i need to keep as backup i) right from the begining
ii) only archivelog files after i switched from noarchivelog mode to archivelog mode