无法按NOARCHIVELOG模式备份或复制活动文件

C:\DocumentsandSettings\Administratorsqlplus/assysdbaSQL*Plus:Release10.2.0.1.0-Productionon星期五7月2921:03:072011Copyright(c)1982,2005,Oracle.Allrightsreserved.连接到:OracleDatabase10gEnterpriseEditionRelease10.2.0.1.0-ProductionWiththePartitioning,OLAPandDataMiningoptionsSQLarchiveloglist;数据库日志模式非存档模式自动存档禁用存档终点USE_DB_RECOVERY_FILE_DEST最早的联机日志序列44当前日志序列46SQLshutdownimmediate;数据库已经关闭。已经卸载数据库。ORACLE例程已经关闭。SQLstartupmount;ORACLE例程已经启动。TotalSystemGlobalArea352321536bytesFixedSize1248936bytesVariableSize134218072bytesDatabaseBuffers209715200bytesRedoBuffers7139328bytes数据库装载完毕。SQLalterdatabasearchivelog;数据库已更改。SQLalterdatabaseopen;数据库已更改。SQLarchiveloglist;数据库日志模式存档模式自动存档启用存档终点USE_DB_RECOVERY_FILE_DEST最早的联机日志序列44下一个存档日志序列46当前日志序列46SQLexit从OracleDatabase10gEnterpriseEditionRelease10.2.0.1.0-ProductionWiththePartitioning,OLAPandDataMiningoptions断开C:\DocumentsandSettings\AdministratorexitRMANbackupdatabaseformat'c:\databack\%U';RMAN