UPDATE:
On the second backplane Dell sent, I continued to get voltage errors on. System wouldn't boot at all with the newer backplane cards.
They believe the power cable may have been the issue. Just in case, I got the kitchen sink full of parts - including the motherboard.
Well, ended up being the motherboard causing the voltage error. Probably also caused the drives to reset. Suspect that the earlier revision backplane allowed for a higher tolerance of incorrect voltage.
I'll let you know if this resurfaces.
I haven't heard back from VM SR case yet. I have uploaded the logs.
Thank you all!
-Justin