That's likely to be a fault in the RAID controller itself, or likely the DIMM slot. Try some air in a can to blow it out, and then insert/remove the DIMM a few times.

Go back to the old RAID controller, and see if there's a way to back up the RAID config, write it to the disks. At least document all the settings. Hopefully the replacement controller will allow you recreate an array, without initializing it.

But try cleaning the old controller first.

What management software are you talking about?

Pioneer PDP-5020FD, Marantz SR6011
Axiom M5HP, VP160HP, QS8
Sony PS4, surround backs
-Chris