记一次系统表空间损坏ORA-600排错

打开数据库，报ORA-00449、ORA-00600、ORA-00471错误
SQL> startup
ORACLE instance started.

Total System Global Area 171966464 bytes
Fixed Size 787988 bytes
Variable Size 145488364 bytes
Database Buffers 25165824 bytes
Redo Buffers 524288 bytes
Database mounted.
ORA-00449: background process 'DBW0' unexpectedly terminated with error 600
ORA-00600: internal error code, arguments: [], [], [], [], [], [], [], []
ORA-00471: DBWR process terminated with error
ORA-00600: internal error code, arguments: [2037], [8396923], [4294967295],
[72], [51], [255], [4294967295], [39125505]


查看alert日志，经过仔细查看，终于找到是(file 1, block 21)出了问题，file 1正是系统表空间。
Errors in file d:\\oracle\\product\\10.1.0\\admin\\pszx_db\\udump\\pstc_ora_3172.trc:
ORA-00600: internal error code, arguments: [2037], [8396923], [4294967295], [72], [51], [255], [4294967295], [39125505]

Thu Apr 19 08:33:23 2012
Hex dump of (file 1, block 21) in trace file d:\\oracle\\product\\10.1.0\\admin\\pszx_db\\bdump\\pstc_dbw0_1024.trc
Corrupt block relative dba: 0x00400015 (file 1, block 21)
Bad header found during preparing block for write
Data in bad block:
type: 51 format: 0 rdba: 0xffffffff
last change scn: 0xffff.ffffffff seq: 0xff flg: 0xff
spare1: 0xff spare2: 0xff spare3: 0xffff
consistency value in tail: 0x01e60201
check value in block header: 0xffff
computed block checksum: 0x5138
Thu Apr 19 08:33:23 2012

后来为了快速解决问题，用备份恢复了系统表空间，之后数据库打开。
后来由于环境无法重现，想用块修复的方式试试。
不知道大家对于系统表空间损坏有没有什么其他好的方法？而且在没有备份的情况下，是不是只有用类似老熊的ODU工具呢？