RMAN> startup force nomount;
RMAN-00571: ===========================================================
RMAN-00569: =============== ERROR MESSAGE STACK FOLLOWS ===============
RMAN-00571: ===========================================================
RMAN-03002: failure of startup command at 03/13/2012 13:51:32
RMAN-04014: startup failed: ORA-02778: Name given for the log directory is invalid
原因:pfile参数设置出错会出现该错误提示。