摘要：安装完时EM能够正常访问。自从客户改了sys密码后，通过WEB登上EM，英文版本报"The database status is currently unavailable. It is possible that the database is in mount or nomount state. Click 'Startup' to obtain the current status and open the database. If the database cannot be opened, click 'Perform Recovery' t 阅读全文