i/o fencing startup problem: change hostid with runnig system?

Hi anyone,

i have on a cluster node different names for the host.

can i change the hostid with command > vxdctl hostid_old hostid_new< on system thats running?

c3:/etc/vx 487su! more /etc/vx/volboot
volboot 3.1 0.4 70
hostid c3neu
hostguid {7a44f67c-1dd2-11b2-a29b-0003ba628555}
defaultdg rootdg
bootdg rootdg
end
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c3:/etc/vx 488su! vxfenadm -d

I/O Fencing Cluster Information:
================================

 Fencing Protocol Version: 201
 Fencing Mode: Disabled
 Cluster Members: 

        * 0 (c3)
          1 (c31)

 RFSM State Information:
        node   0 in state  8 (running)
        node   1 in state  8 (running)

Error message:

2008/09/16 10:51:51 VCS ERROR V-16-10001-13540 (c3) SANVolume:Fencing:clean:The volume device (/dev/vx/dsk/c3neu/C3-Share/fencing) cannot be found2008/09/16 11:38:47 VCS ERROR V-16-10001-13502 (c3)

SANVolume:Fencing:online:Error in attaching volume fencing to c3neu
2008/09/16 11:38:48 VCS INFO V-16-2-13001 (c3) Resource(Fencing): Output of the
completed operation (online)
SANVM ERROR V-52-51033-1002 Unable to communicate with StorageAgent. Please chec
k the host name and  make sure StorageAgent agent is running on the host c3neu.

regards

Gerd