接上一篇，在搞定SCN问题后，又遇到ORA-600[4194]/[4193]报错。

故障现象：

OPEN数据库时报错：ORA-00600: internal error code, arguments: [4194], [], [], [], [], [], [], []

4193：表示undo和redo不一致（Arg [a] Undo record seq number，Arg [b] Redo record seq number ）；
4194：表示也是undo和redo不一致（Arg [a] Maximum Undo record number in Undo block，Arg [b] Undo record number from Redo block）

故障解决：

1、修改参数
undo_management= MANUAL
undo_tablespace= SYSTEM
2、OPEN数据库，删除当前undo空间，重建新的undo空间
3、修改参数
undo_management= AUTO
undo_tablespace= UNDOTBS1
4、重新启动数据库