ORA-17503 ksfdopn2 Failed to open file .....

今天查看rac的目录发现，/oracle 用户和组不太对，然后用安装时的权限变更chown 和chmod 再刷了一遍，然后就悲剧了。

发现集群crs 正常启动，has 正常，asm 正常，但是数据库打不开，报错如下

ORA-01078: failure in processing system parameters
ORA-01565: error in identifying file '+DATA/spcp/spfilecamsdb.ora'
ORA-17503: ksfdopn:2 Failed to open file +DATA/spcp/spfilecams.ora'
ORA=12547: TNS:lost contact

解决方法：
Oracle binary should have permission of 6751. To correct the permission, as owner of oracle binary:

cd $GRID_HOME/bin #到$GRID_HOME/bin下
chmod 6751 oracle

cd $ORACLE_HOME/bin
chmod 6751 oracle

After the change, permission should show:
ls -l oracle
-rwsr-s--x 1 grid oinstall 152400480 Nov 24 15:49 oracle


Once the permission is fixed, if database still fails to come up, restart Grid Infrastructure.
故障解决，感谢itpub 的  nokilled 和 xlptt

转自：
http://www.itpub.net/thread-1457709-1-1.html