 Hello,   Downgrade, correct not an option.  There's also concern with FW level depending on the disk drives in the 6010.  Some drives require the newer firmware on the array.   Don 
So I know this is probably HIGHLY not recommended, but we're trying to group this PS6010 with a few older units like a PS4000, which are all running along happily at 4.3.6.  I am under the impression that you can't add an Equallogic to an existing group unless it matches the firmware revision of the rest of the group members. Is this at all possible via any means? (I already know it's not possible via the GUI)  Am I certain to brick my system if I attempt to force-load the associated images onto the microSD cards for example?  Ok, I already tried this but received a message like "the NVSRAM present in the system is newer than the version found on the controller"  Version 16 was on the system (somewhere) and version 11 was on the controller that I re-imaged.  My next thought was to unseat the coin and NVSRAM batteries in the controllers hopes that they will forget that they ever had a newer version, but it seems like not the best idea.  Anyone have experience with this kind of thing?  It's obviously not something that most people will have tried, but hey, there are a lot of smart people on this forum. Thanks!
Downgrade from 7.0.1 to 4.3.6 firmware for a PS6010