Oracle 11GR2 RAC OHASD failed to start solution ____oracle

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. The first time you install 11GR2 RAC encountered this 11.0.2.1 classic problem, the Internet to find out that this is a bug, the solution is very simple,

is to execute the following command before executing root.sh

/bin/dd if=/var/tmp/.oracle/npohasd of=/dev/null bs=1024 count=1

If you appear

/bin/dd:opening '/VAR/TMP/.ORACLE/NPOHASD ': No such file or directory

When the file has not been born to continue execution, until it can be implemented, generally appear adding daemon to inittab this message when the DD command.

Another workaround is to change file permissions

Chown ROOT:OINSTALL/VAR/TMP/.ORACLE/NPOHASD

Do not forget to remove the configuration before root.sh:/u01/app/11.2.0/grid/crs/install/roothas.pl-deconfig-force-verbose

Reference:

https://cn.forums.oracle.com/forums/thread.jspa?threadID=2350285

http://blog.csdn.net/tianlesoftware/article/details/8207629