Does not help the discussion. Please disregard
Separate to the main thread, one might buy drives that have a non standard byte size, and Wendell did a post on formatting the drives back to a more standard sector size. It’s a good way to pick up a bargain if they are on sale.
With the out of memory error OP encountered, I would have said it might be a different memory than main memory, but have no idea about raid cache memory, and it seems I would not have helped anyway. Welp, glad OP figured it out…