2 different messages:

" Panic recovery from CPU0 with reason 'xlp_ddr_ecc_disable_error: DDR correctable threshold exceeded on channel 1, cause failover'. "

" NVRAM contains valid data. This is a PANIC RECOVERY due to a panic on a NetBSD processor."

So last night I on purpose failed over to the secondary controller to change cache battery pack in primary. That failover went great. I wasn't at work, but i was going to replace the battery today (now that primary has become the secondary controller, prefect)

fast forward 1 hour (I'm now asleep), and I boom my PS6210xs fails back to the other controller. The internet has ZERO results on this.. I have no contract with Dell (yes, THIS is why you have a contract). I'm going to buy a controller as I think it failed due to bad memory. Can anyone share if they have had a similar experience?

we are now running on the original controller but battery is depleted so we are in write-through mode, performance seems fine.