ORA-01595: error freeing extent (9) of rollback segment (2))

ALLSTARS_ORACLE

哪位高手帮忙看看。
环境oracle9.2.0.1，windows2000。从前几天出现：

Errors in file c:\oracle\admin\orcl\bdump\orcl1_smon_2148.trc:
ORA-01595: error freeing extent (9) of rollback segment (2))
ORA-00607: Internal error occurred while making a change to a data block
ORA-00600: internal error code, arguments: [4194], [56], [61], [], [], [], [], []


Sat Feb 08 07:13:07 2003
Errors in file c:\oracle\admin\orcl\bdump\orcl1_smon_1996.trc:
ORA-00600: internal error code, arguments: [4194], [56], [61], [], [], [], [], []

Recovery of Online Redo Log: Thread 1 Group 2 Seq 858 Reading mem 0
Mem# 0 errs 0: \\.\S_REDO01_02
Recovery of Online Redo Log: Thread 1 Group 2 Seq 858 Reading mem 0
Mem# 0 errs 0: \\.\S_REDO01_02
Sat Feb 08 07:13:13 2003
Errors in file c:\oracle\admin\orcl\bdump\orcl1_smon_1996.trc:
ORA-00604: error occurred at recursive SQL level 1
ORA-00607: Internal error occurred while making a change to a data block
ORA-00600: internal error code, arguments: [4194], [56], [61], [], [], [], [], []


好象是undo出现坏块，但是又怀疑是BUG。