备份需先开启归档
alter database mount;#设置归档路径 alter database add archivelog 'type=local,dest=/dm8/arch,file_size=64,space_limit=0';alter database archivelog; alter database open; #查数据库的状态、归档参数 select name,status$,ARCH_MODE from v$database; select * from v$dm_arch_ini;
新建备份
默认即可