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RMAN> backup full database format "/opt/Oracle/backup/backup_%T_%s_%p.bak";Starting backup at 01-SEP-11
using channel ORA_DISK_1
RMAN-00571: ===========================================================
RMAN-00569: =============== ERROR MESSAGE STACK FOLLOWS ===============
RMAN-00571: ===========================================================
RMAN-03002: failure of backup command at 09/01/2011 00:30:19
RMAN-20021: database not setRMAN-06031: could not translate database keyword原因是在另一个窗口将数据库由mount改到open操作引起的:SQL> ALTER DATABASE OPEN;此时,RMAN未接获数据库打开的通知,退出,再从新连入即可解决。(如果不行尝试设置nls_lang,其实应该不用的)Oracle RMAN 丢失归档日志:ORA-19625: error identifying file利用bind9架设智能DNS——PostgreSQL数据库篇相关资讯      Oracle教程 
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