Cannot configure two CRS instances on the same cluster.

在运行root.sh时提示，提示Cannot configure two CRS instances ：
CRS is already configured on this node for crshome=0
Cannot configure two CRS instances on the same cluster.
Please deconfigure before proceeding with the configuration of new home.
显示已经配置过了，删除配置重新运行即可
[root@node2 grid]# ./crs/install/roothas.pl -delete -force -verbose
2013-08-13 00:35:40: Checking for super user privileges
2013-08-13 00:35:40: User has super user privileges
2013-08-13 00:35:40: Parsing the host name
Using configuration parameter file: crs/install/crsconfig_params
CRS-4535: Cannot communicate with Cluster Ready Services
CRS-4000: Command Stop failed, or completed with errors.
CRS-4535: Cannot communicate with Cluster Ready Services
CRS-4000: Command Delete failed, or completed with errors.
CRS-4133: Oracle High Availability Services has been stopped.
/oracle/grid/bin/acfsdriverstate: line 51: /lib/acfstoolsdriver.sh: No such file or directory
/oracle/grid/bin/acfsdriverstate: line 51: exec: /lib/acfstoolsdriver.sh: cannot execute: No such file or directory
Successfully deconfigured Oracle Restart stack