vxfen

hi, I wish to verify to fencing mechanism. Let`s say we have 10 nodes in vcs and we start all of the nodes.After the vcs is up and running one of those nodes write the keyregistration on coordinator device group.is right? Or maybe all the nodes write the key registration? How I verify the health of fencing DG?(Should I verify if DG has key registration from an node(all the nodes),then vxprint -ht?,what else?). When is happening an split brain,what is the mechanism that some of the 10 nodes remain in vcs and the rest crash?i.e. 6 nodes remain in vcs and 4 nodes crash. How I handle this split brain?I mean on the 6 nodes I delete the key registration,i repair the 4 nodes and join them to vcs? If I do not handle this scenario,then every of the 4 node when try to join vcs see that there is an key registration on DG fencing and will crash? tnx a million