oracle数据库备份

oracle备份
我把"d:oracleoradata"里的数据库文件夹和"d:oracleadmin"中的数据库文件夹从机器a复制到机器b中对应的文件夹，然后改了listener.ora、tnsnames.ora文件
listener.ora文件为

# listener.ora network configuration file: d:oracleora92networkadminlistener.ora # generated by oracle configuration tools. listener =   (description_list =   (description =   (address_list =   (address = (protocol = ipc)(key = extproc0))   )   (address_list =   (address = (protocol = tcp)(host = wangpei)(port = 1521))   )   )   ) sid_list_listener =   (sid_list =   (sid_desc =   (sid_name = plsextproc)   (oracle_home = d:oracleora92)   (program = extproc)   )   (sid_desc =   (global_dbname = jiegou)   (oracle_home = d:oracleora92)   (sid_name = jiegou)   )   (sid_desc =   (global_dbname = jiegou2)   (oracle_home = d:oracleora92)   (sid_name = jiegou2)   )   ) tnsnames.ora文件 # tnsnames.ora network configuration file: d:oracleora92networkadmintnsnames.ora # generated by oracle configuration tools. jiegou =   (description =   (address_list =   (address = (protocol = tcp)(host = wangpei)(port = 1521))   )   (connect_data =   (service_name = jiegou)   )   ) inst1_http =   (description =   (address_list =   (address = (protocol = tcp)(host = wangpei)(port = 1521))   )   (connect_data =   (server = shared)   (service_name = modose)   (presentation = http://hrservice)   )   ) extproc_connection_data =   (description =   (address_list =   (address = (protocol = ipc)(key = extproc0))   )   (connect_data =   (sid = plsextproc)   (presentation = ro)   )   ) jiegou2 =   (description =   (address_list =   (address = (protocol = tcp)(host = wangpei)(port = 1521))   )   (connect_data =   (service_name = jiegou2)   )   )

其中jiegou2是我这边自己建的一个新数据库，应该不会有影响。
不过用plsql登录时报错ora-12500:tns:监听程序无法启动专用服务器进程
问题有两个：①按理说这种方法应该是没有问题的，估计是我没对应上oracle里的某个映射关系，不知道有没有人遇到我这种类似的问题，讨论讨论这种方法能不能做出来
②ora-12500这个错误我在网上也查了