Maximum amount of configurable SSD cache for an array is related to the controller's primary cache size. This chart shows the amount of SSD cache configurable for various primary cache size of the con...Maximum amount of configurable SSD cache for an array is related to the controller's primary cache size. This chart shows the amount of SSD cache configurable for various primary cache size of the controllers: Up to 2 GB > 4 GB to 8 GB Controller Cache Size Configurable SSD Cache Size > 1 GB to 2 GB > 2 GB to 4 GB Controller's primary cache size will be smaller than the controller installed memory size The size difference will vary depending on the release version and array configuration.