问题：在SCOunix505安装oracle734时出现如下问题？

kongjx

3  There are still sgadef<SID>;.dbf file(s) in $ORACLE_HOME/dbs/        3
   3  (/home/oracle/app/oracle/product/7.3.4/dbs/).  This indicates that  3
   3  there may still be running instances.  You must shut down all       3
   3  database instances associated with this ORACLE_HOME before          3
   3  upgrading the Server.  Select (YES) if you have shut down the       3
   3  instances from another terminal/window.  Select (NO) to abort       3
   3  installation in order to shutdown running instances.                3
如何解决，谢了！