Hi Guys, My system shutdown abnormally due to power. Now the database not able to open, it prompt: ORA-00600: internal error code, arguments: [kcratr_nab_less_than_odr], [1], [43], [17448], [17450], [], [], [], [], [], [], [] I searched google, but no solution. Any advise? Thank you. This is the trace file: Trace file /u01/app/oracle/diag/rdbms/sorcl/sorcl/trace/sorcl_ora_993.trc Oracle Database 11g Enterprise Edition Release 11.2.0.1.0 - 64bit Production With the Partitioning, Oracle Label Security, OLAP, Data Mining, Oracle Database Vault and Real Application Testing options ORACLE_HOME = /u01/app/oracle/product/11.2.0/dbhome_1 System name: SunOS Node name: solaris Release: 5.10 Version: Generic_142910-17 Machine: i86pc Instance name: sorcl Redo thread mounted by this instance: 1 Oracle process number: 19 Unix process pid: 993, image: oracle@solaris (TNS V1-V3) *** 2010-10-23 23:21:14.491 *** SESSION ID:(125.7) 2010-10-23 23:21:14.491 *** CLIENT ID:() 2010-10-23 23:21:14.491 *** SERVICE NAME:() 2010-10-23 23:21:14.491 *** MODULE NAME:(sqlplus@solaris (TNS V1-V3)) 2010-10-23 23:21:14.491 *** ACTION NAME:() 2010-10-23 23:21:14.491 Successfully allocated 2 recovery slaves Using 66 overflow buffers per recovery slave Thread 1 checkpoint: logseq 43, block 2, scn 1818123 cache-low rba: logseq 43, block 16705 on-disk rba: logseq 43, block 17450, scn 1825373 change track rba: logseq 43, block 17448, scn 1825364 start recovery at logseq 43, block 16705, scn 0 *** 2010-10-23 23:21:14.515 Started writing zeroblks thread 1 seq 43 blocks 17448-17455 *** 2010-10-23 23:21:14.517 Completed writing zeroblks thread 1 seq 43 ==== Redo read statistics for thread 1 ==== Total physical reads (from disk and memory): 4096Kb -- Redo read_disk statistics -- Read rate (ASYNC): 371Kb in 0.02s => 18.14 Mb/sec Longest record: 0Kb, moves: 0/1232 (0%) Change moves: 2/48 (4%), moved: 0Mb Longest LWN: 87Kb, moves: 0/90 (0%), moved: 0Mb Last redo scn: 0x0000.001bda4d (1825357) ---------------------------------------------- ----- Recovery Hash Table Statistics --------- Hash table buckets = 32768 Longest hash chain = 1 Average hash chain = 170/170 = 1.0 Max compares per lookup = 1 Avg compares per lookup = 2116/2354 = 0.9 ---------------------------------------------- WARNING! Crash recovery of thread 1 seq 43 is ending at redo block 17448 but should not have ended before redo block 17450 Incident 8554 created, dump file: /u01/app/oracle/diag/rdbms/sorcl/sorcl/incident/incdir_8554/sorcl_ora_993_i8554.t rc ORA-00600: internal error code, arguments: [kcratr_nab_less_than_odr], [1], [43], [17448], [17450], [], [], [], [], [], [], [] ORA-00600: internal error code, arguments: [kcratr_nab_less_than_odr], [1], [43], [17448], [17450], [], [], [], [], [], [], [] ORA-00600: internal error code, arguments: [kcratr_nab_less_than_odr], [1], [43], [17448], [17450], [], [], [], [], [], [], [] *** 2010-10-23 23:23:29.757 Stopping background process MMNL *** 2010-10-23 23:23:30.757 Stopping background process MMON *** 2010-10-23 23:23:31.859 ksukia: Starting kill, flags = 1 ksukia: killed 0 out of 0 processes. *** 2010-10-23 23:23:31.984 4132 krsh.c ARCH: Archival disabled due to shutdown: 1089 *** 2010-10-23 23:23:33.039 *** 2010-10-23 23:23:33.039 4132 krsh.c ARCH: Archival disabled due to shutdown: 1089 -- Best Regards Zhou Huan <patriotzhou@xxxxxxxxx>