ORACLE数据在使用过程中，会突然DOWM掉，数据库版本是 9.2.0.6.0，操作系统是：AIX，请高手帮忙看一下是什么原因引起的，以下是数据库的alert日志文件:

27271 Mon May 14 12:19:06 2007
27272 ARC0: Evaluating archive log 3 thread 1 sequence 20191
27273 ARC0: Beginning to archive log 3 thread 1 sequence 20191
27274 Creating archive destination LOG_ARCHIVE_DEST_1: '/proddata/prod/prodarch/arch_1_20191.arc'
27275 ARC0: Completed archiving log 3 thread 1 sequence 20191
27276 Mon May 14 12:19:47 2007
27277 Completed checkpoint up to RBA [0x4ee0.2.10], SCN: 0x0000.982801e3
27278 Mon May 14 12:20:08 2007
27279 Beginning log switch checkpoint up to RBA [0x4ee1.2.10], SCN: 0x0000.98281066
27280 Thread 1 advanced to log sequence 20193
27281 Current log# 2 seq# 20193 mem# 0: /proddata/prod/proddata/redo02.log
27282 Mon May 14 12:20:08 2007
27283 ARC1: Evaluating archive log 1 thread 1 sequence 20192
27284 ARC1: Beginning to archive log 1 thread 1 sequence 20192
27285 Creating archive destination LOG_ARCHIVE_DEST_1: '/proddata/prod/prodarch/arch_1_20192.arc'
27286 ARC1: Completed archiving log 1 thread 1 sequence 20192
27287 Mon May 14 12:20:31 2007
27288 Completed checkpoint up to RBA [0x4ee1.2.10], SCN: 0x0000.98281066
27289 ***
27290 Corrupt block relative dba: 0x0103d009 (file 516, block 249865)
27291 Bad header found during preparing block for write
27292 Data in bad block -
27293 type: 6 format: 2 rdba: 0x5080148e
27294 last change scn: 0x0000.58ea2351 seq: 0x1 flg: 0x06
27295 consistency value in tail: 0x23510601
27296 check value in block header: 0x78d4, computed block checksum: 0x0
27297 spare1: 0x0, spare2: 0x0, spare3: 0x0
27298 ***
27299 Mon May 14 12:20:50 2007
27300 Errors in file /proddata/prod/proddb/9.2.0/admin/PROD_dbserver/bdump/prod_dbw1_3105104.trc:
27301 ORA-00600: internal error code, arguments: [kcbzpb_1], [17027081], [4], [1], [], [], [], []
27302 ***
27303 Corrupt block relative dba: 0x0103d00a (file 516, block 249866)
27304 Bad header found during preparing block for write
27305 Data in bad block -
27306 type: 6 format: 2 rdba: 0x5080148f
27307 last change scn: 0x0000.58ea2351 seq: 0x1 flg: 0x06
27308 consistency value in tail: 0x23510601
27309 check value in block header: 0x74fe, computed block checksum: 0x0
27310 spare1: 0x0, spare2: 0x0, spare3: 0x0
27311 ***
27312 Mon May 14 12:20:51 2007
27313 Errors in file /proddata/prod/proddb/9.2.0/admin/PROD_dbserver/bdump/prod_dbw0_3129600.trc:
27314 ORA-00600: internal error code, arguments: [kcbzpb_1], [17027082], [4], [1], [], [], [], []
27315 Mon May 14 12:20:52 2007
27316 Errors in file /proddata/prod/proddb/9.2.0/admin/PROD_dbserver/bdump/prod_dbw1_3105104.trc:
27317 ORA-00600: internal error code, arguments: [kcbzpb_1], [17027081], [4], [1], [], [], [], []
27318 Mon May 14 12:20:52 2007
27319 DBW1: terminating instance due to error 600

alert中和本次错误相关的就这么多提示信息，请各位老大帮忙分配一下是什么原因造成的，谢了！