在Oracle Linux 6.2 上安装11.2.0.1 的RAC，在安装grid时执行root.sh 脚本，报错，如下：

[root@rac1 ~]# /u01/sys_software/product/11.2.0/grid/root.sh
Running Oracle 11g root.sh script...

The following environment variables are set as:
    ORACLE_OWNER= grid
    ORACLE_HOME=  /u01/sys_software/product/11.2.0/grid

Enter the full pathname of the local bin directory: [/usr/local/bin]:
   Copying dbhome to /usr/local/bin ...
   Copying oraenv to /usr/local/bin ...
   Copying coraenv to /usr/local/bin ...

Creating /etc/oratab file...
Entries will be added to the /etc/oratab file as needed by
Database Configuration Assistant when a database is created
Finished running generic part of root.sh script.
Now product-specific root actions will be performed.
2013-01-08 17:18:27: Parsing the host name
2013-01-08 17:18:27: Checking for super user privileges
2013-01-08 17:18:27: User has super user privileges
Using configuration parameter file: /u01/sys_software/product/11.2.0/grid/crs/install/crsconfig_params
Creating trace directory
LOCAL ADD MODE
Creating OCR keys for user 'root', privgrp 'root'..
Operation successful.
  root wallet
  root wallet cert
  root cert export
  peer wallet
  profile reader wallet
  pa wallet
  peer wallet keys
  pa wallet keys
  peer cert request
  pa cert request
  peer cert
  pa cert
  peer root cert TP
  profile reader root cert TP
  pa root cert TP
  peer pa cert TP
  pa peer cert TP
  profile reader pa cert TP
  profile reader peer cert TP
  peer user cert
  pa user cert
Adding daemon to inittab
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/sys_software/product/11.2.0/grid/crs/install/rootcrs.pl line 443.
这个错误是在Oracle 版本11.2.0.1的时候出现，在后面的11.2.0.3的时候就不会有这种问题，而解决方法就是在生成了文件/var/tmp/.oracle/npohasd文件后，root立即执行命令：

/bin/dd if=/var/tmp/.oracle/npohasd f=/dev/nullbs=1024 count=1

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