Hello Friend wolfang.
Cluster, usually when I add a new node other nodes are restarting.
The current storage is FreeNAS via chanel fiber, but will be changing this scenario for Proxmox + DRBD + Fibre Channel.
root@prox-r1-s1:~# pvecm status
Quorum information
------------------
Date: Thu May 19 11:31:10 2016
Quorum provider: corosync_votequorum
Nodes: 6
Node ID: 0x00000001
Ring ID: 15324
Quorate: Yes
Votequorum information
----------------------
Expected votes: 7
Highest expected: 7
Total votes: 6
Quorum: 4
Flags: Quorate