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标题:控制文件异常导致ORA-00600[kccsbck_first]
作者:惜分飞©版权所有[未经本人同意,不得以任何形式转载,否则有进一步追究法律责任的权利.]
今天接到一个朋友求救他们的his系统数据库不能访问,情况比较紧急,让我帮忙处理.登录数据库得到信息如下:
操作系统:windows 2003 数据库:8.1.7 容灾方案:双机+emc存储镜像 备份:数据库无任何备份 启动到mount报错类此: ORA-00600: internal error code, arguments: [kccsbck_first], [1], [4141358753], [], [], [], [], []
这个问题在上周的数据库恢复中遇到过一次,他们也是因为双机的案例,当时的情况见:双机mount数据库出现ORA-00600[kccsbck_first],有了上次的思维,我开始也怀疑是客户的双机的问题,但是客户说双机在半年前就关闭了,没有启动过;因为我对win的双机不太熟悉,怕他们双机软自动启动系统然后接管oracle从而导致这个问题,然后让客户检查另一台机器,确定没有启动和接管oracle 服务.
然后查询MOS发现win上面的特殊之处:是控制文件corruption导致故障(不过dbv检查不出来),而且三个控制文件有同样的问题
MOS记录如下(不过8.1.7也存在同样问题) [ID 291684.1]
Applies to: Oracle Server - Enterprise Edition - Version: 9.0.1.5 and later [Release: 9.0.1 and later ] Information in this document applies to any platform. ***Checked for relevance on 09-APR-2012*** Symptoms Alter database mount exclusive results in ORA-00600: internal error code, arguments: [kccsbck_first], [1], [2141358753], [], [], [], [], [] The description of the error is: 'We receive this error because we are attempting to be the first thread/instance to mount the database and cannot because it appears that at least one other thread has mounted the database already'. However in this case the database was a standalone database on Windows. It had only one oracle service running. The operating system was rebooted, the oracle service was deleted and a new service created. Even then the error persisted. Cause There was some corruption present in the controlfile. Solution In this case the problem was resolved by: + Taking a backup of the old control file + Recreating the control file using the following document How to Recreate a Controlfile [Document 735106.1]
因为数据库不能mount,所以不能使用backup controlfile to trace;
因为是win系统,没有任何的控制文件备份,只能把控制文件拷贝到linux下面通过strings命令,自己编辑创建控制文件脚本(noresetlogs).执行脚本创建控制文件,recover database,应用redo文件恢复,然后resetlogs库,恢复成功(注意:8i中不需要另外增加临时文件)
这里的双机是系统级别的一种功能,类此rac,但是同时只有一个主机open 存储上的db.当这个主机或者该主机上的数据库实例异常时候,该数据库和实例自动切换到另外一台主机上.从而实现数据库的高可用,常见的有ROSEHA,HEADBEART,RHCS等
Hi,惜分飞,双机指的是什么呢?是指RAC还是Data Guard?
烦请解释下双机的概念,谢谢。