客户由于虚拟化环境空间不足，导致数据库异常，启动报ORA-600 kcratr_nab_less_than_odr错误

Mon Apr 06 00:13:16 2026
Completed: alter database mount exclusive
alter database open
Beginning crash recovery of 1 threads
 parallel recovery started with 3 processes
Started redo scan
Mon Apr 06 00:13:26 2026
Completed redo scan
 read 5480 KB redo, 459 data blocks need recovery
Errors in file d:\app\administrator\diag\rdbms\orcl\orcl\trace\orcl_ora_2324.trc  (incident=418959):
ORA-00600: ??????, ??: [kcratr_nab_less_than_odr], [1], [53856], [40105], [43042], [], [], [], [], [], [], []
Incident details in: d:\app\administrator\diag\rdbms\orcl\orcl\incident\incdir_418959\orcl_ora_2324_i418959.trc
Aborting crash recovery due to error 600
Errors in file d:\app\administrator\diag\rdbms\orcl\orcl\trace\orcl_ora_2324.trc:
ORA-00600: ??????, ??: [kcratr_nab_less_than_odr], [1], [53856], [40105], [43042], [], [], [], [], [], [], []
Errors in file d:\app\administrator\diag\rdbms\orcl\orcl\trace\orcl_ora_2324.trc:
ORA-00600: ??????, ??: [kcratr_nab_less_than_odr], [1], [53856], [40105], [43042], [], [], [], [], [], [], []
ORA-600 signalled during: alter database open...
Mon Apr 06 00:13:33 2026
Trace dumping is performing id=[cdmp_20260406001333]

由于客户自己不熟悉，故障之后，没有再次继续操作，一直保留着现场。这个故障一般是由于ctl写丢失导致，一般首先选择rectl

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然后尝试open库，运气不错，直接打开成功

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这样就完成了本次恢复工作，数据库一切正常，运气不错。对于ORA-600 kcratr_nab_less_than_odr错误大部分时候，可以这样简单的恢复，但是也遇到过rectl之后，继续报ORA-600等错误的情况:
ORA-600 kcratr_nab_less_than_odr和ORA-600 4194故障处理
ORA-600 kcratr_nab_less_than_odr和ORA-600 2662故障处理
ORA-600 kcratr_nab_less_than_odr和ORA-600 4193故障处理