REDOログのメンバを追加する

データベースをオープンしたままで追加できる

alter database add logfile member '/export/home/oracle/orasys03/orcl/redo01.log' to group 1;
alter database add logfile member '/export/home/oracle/orasys03/orcl/redo02.log' to group 2;
alter database add logfile member '/export/home/oracle/orasys03/orcl/redo03.log' to group 3;