failsafe configure questions

Hello, everyone!

I am begin use linux failsafe two weeks ago.Now I have installed it to RedHat 7.3 with SGI XFS support.

When I begin my configure, I meet some questions.
I wonder who can help me about this.

 My cluster include two host, they are connect by two ethernet  line ( one to public network and one to private network) and a serial line, they are all connect to a shared SCSI disk array. I want to make it a HA NFS server, while a host is working,another standby.
     ================================Public Network========================================           
              	|                                             			|
		| 192.168.9.141							| 192.168.9.143
	+-------eth0-----+ 						+-------eth0-----+
	|             eth1[192.168.3.1]---------------------[192.168.3.3]eth1            | 
	|    Host A      |						|      Host B    |
	|               COM0-------------------------------------------COM0              |
	+-------+--------+						+-------+--------+
		|								|
		|								|
		|			+---------------+			|		
		+----------------------	|   Shared SCSI	|-----------------------+
					|   Disk Array	|
					+---------------+

I wrote the following scripts:


define node xfs1
set nodeid to 1
set is_failsafe to true
set sysctrl_type to null
set sysctrl_status to enabled
set sysctrl_password to none
set sysctrl_owner to xfs3
set sysctrl_device to /dev/ttyS0
set sysctrl_owner_type to tty
add nic 192.168.9.141

set heartbeat to true
set ctrl_msgs to true
set priority to 1
done

add nic 192.168.3.1
set heartbeat to true
set ctrl_msgs to true
set priority to 2
done
done


define node xfs3
set nodeid to 3
set is_failsafe to true
set sysctrl_type to null
set sysctrl_status to enabled
set sysctrl_password to none
set sysctrl_owner to xfs1
set sysctrl_device to /dev/ttyS1
set sysctrl_owner_type to tty
add nic 192.168.9.145

set heartbeat to true
set ctrl_msgs to true
set priority to 1
done

add nic 192.168.3.3
set heartbeat to true
set ctrl_msgs to true
set priority to 2
done
done


when I use this scripts one all the two hosts, They all show that define node failure.

when I use "Show nodes" command, It seems these two node was define OK!

and I can't Use the following scrpits define:

define cluster test_xfs
set is_failsafe to true
add node xfs1
add node xfs2

when I use this, it always show failure.

And my /etc/hosts file is as follow on all the two hoosts:

127.0.0.1               localhost.localdomain localhost
192.168.9.145           xfs3.fs xfs3
192.168.9.141           xfs1.fs xfs1
192.168.3.1             xfs1.fs xfs1
192.168.3.3             xfs3.fs xfs3


Can you guide me what my error is?

and I still have other questions as following:

1. Sometimes when I click on "Setup a New Cluster" ( in " Guide Configuration" ), the mouse show the wait stat and I can't continue. I use the cdbreinit to reinit DB, I can enter   "Setup a New Cluster" . But when I enter for the second time, It can't enter again.

2.On the Node config interface, what's the mean of "VACM", "STONITH"? I have a serial line connect this two host from COM0 (ttyS0), How can I select? what the "sysctrl_device" should I use?

Can you send me a Similar config scripts? Though the Admin Guide introduce some config, but I can't understand some terms very well.

Sorry for bother you!

Regards!

Jason.Xue