--创建多路复用控制文件

show parameter control_files;

shutdown immediate;
startup nomount;
alter system set control_files="d:\oracle\product\10.2.0\oradata\dbtest\control01.ctl",
    "d:\oracle\product\10.2.0\oradata\dbtest\control02.ctl" scope=spfile;
startup force;

--创建多路复用redo文件

select group#,sequence#,members,status from v$log;
select group#,status,member from v$logfile;

alter database add logfile member
    'D:\Oracle\product\10.2.0\oradata\dbtest\redo01b.log' to group 1;