CRS-4124: Oracle High Availability Services startup failed. CRS-4000: Command Start failed, or completed with errors. ohasd failed to start: Inappropriate ioctl for device ohasd failed to start at/u01/app/11.2.0/grid/crs/install/rootcrs.pl
CRS-4124: Oracle High Availability Services startup failed.
CRS-4000: Command Start failed, or completed with errors.
ohasd failed to start: Inappropriate ioctl for device
ohasd failed to start at/u01/app/11.2.0/grid/crs/install/rootcrs.pl line 443.
第一次安装11gR2 RAC的时候就遇到了这个11.0.2.1的经典问题，上网一查才知道这是个bug，解决办法也很简单，就是在执行root.sh之前执行以下命令
/bin/dd if=/var/tmp/.oracle/npohasd of=/dev/null bs=1024 count=1
如果出现
/bin/dd: opening`/var/tmp/.oracle/npohasd': No such file or directory
的时候文件还没生成就继续执行，直到能执行为止，一般出现Adding daemon to inittab这条信息的时候执行dd命令。
另外还有一种解决方法就是更改文件权限
chown root:oinstall /var/tmp/.oracle/npohasd
重新执行root.sh之前别忘了删除配置：/u01/app/11.2.0/grid/crs/install/roothas.pl -deconfig -force-verbose
参考：
https://cn.forums.oracle.com/forums/thread.jspa?threadID=2350285
http://blog.csdn.net/tianlesoftware/article/details/8207629
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