I have a x2PSC and x2vCenter appliances running in linked mode accross two seperate sites. I'm planning the upgrade now however my concern is our hosts (mainly IBM UCS M3/4 series B200 blades) dont have a 6.7 vendor imagine. I dont really want to put us in a situation where either VMware or Cisco UCS wont support out configuration. Is it OK to leave them on 6.5U1 long term I know its a supported configuration short term at least but dont know about long?
Also as a bonus question does it matter which site I upgrade first? I will be proceeding with the Platform Services Controllers then the vCenter servers but not sure if it matters if I proceed with the large site or small site first. I dont believe linked mode runs as a primary or master config but could be wrong.