Hi I am building an Exchange 2007 SP1 cluster, A/A/P, using SCC. The CMS's are Exch1 and Exch2. The CNO's are ServerA, ServerB, ServerC - All Windows 2008 servers. I need to run Jetstress to ensure the disk subsystem/SAN can cope with the requirements, however am not sure if I need to run the Jetstress on ServerA and ServerB, or on each physical node? Secondly, I understand that we'll be using Node Majority for our Quorum, but I still can't get how this works in my head. Does anyone have a simple explanation/link? Many thanks in advance.