Hello,  When you did the firmware upgrade is likely when it swapped controllers.  There are only two ways to configure the array, either via serial cable or using the "Remove Setup Wizard".  (RSW)  Which is available for WIndows or Linux.  (Limited distros)   The computer running RSW must be on the same subnet as the array.   RSW will allow you to add it to your existing group.   Since you have more than one array, you might want to invest in a terminal server.  They aren't very expensive and I find them extremely useful, especially during firmware upgrades.  My preference is to upgrade via serial so I can watch the complete process and in the unlikely event there's a problem, you're already hooked up and ready for triage. E.g. a compact flash fails.   Regards,   Don 
Hi, last week i received a new PS4100 that was on an older firmware level than my existing group, so i had to install it into it's own group first to be able to upgrade the firmware. So i connected everything, even a serial cable to CM0 and left the datacenter. Remotely i did initial setup and eventually updated the firmware. Than i could issue a reset command so i could do the initial setup and join it to the existing group. BUT: after the reset, apparantly it booted into CM1 so now i can't perform any magic to it. If i log into CM0 it says it is not the active controller and i can't perfom any commands. So how should i have done this? and how can i setup the machine. (please don't tell me to go to the datacenter to switch the console cable... I would think of that as a rather stupid approach!)
How can i switch active controller on a 'reset' array