In Oracle Express Edition 10g :
设置控制面板中的Schedule Tasks，用BIN下的Backup.bat来定时备份，发现错误：
==================== ERROR =============================
Backup of the database failed.
Unknown log mode : SP2-0640:.
Log file is at SP2-0640:.
==================== ERROR =============================
Press any key to continue . . .[@more@]
设置控制面板中的Schedule Tasks，用BIN下的Backup.bat来定时备份，发现错误：
==================== ERROR =============================
Backup of the database failed.
Unknown log mode : SP2-0640:.
Log file is at SP2-0640:.
==================== ERROR =============================
Press any key to continue . . .[@more@]
运行backup.bat出错
In Oracle Express Edition 10g :
设置控制面板中的Schedule Tasks，用BIN下的Backup.bat来定时备份，发现错误：
==================== ERROR =============================
Backup of the database failed.
Unknown log mode : SP2-0640:.
Log file is at SP2-0640:.
==================== ERROR =============================
Press any key to continue . . .
原因：D:OracleOraXEapporacleproduct10.2.0serverNETWORKADMINsqlnet.ora中使用SQLNET.AUTHENTICATION_SERVICES = (NONE)，造成无法用指当前定为dba的系统用户登录，connect / as sysdba也会出错。改成SQLNET.AUTHENTICATION_SERVICES = (NTS)就可以了。
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