Determine DS8000 Series model

The DS8300 Model 9A2/9B2 provides a split between the resources.
Each storage image uses the machine type/model number/serial number of the
DS8300 Model 9A2/9B2 base frame. The frame serial number ends with a 0. The
last character of the serial number is replaced by a number in the range one to
eight that uniquely identifies the DS8000 image. This character is a 1 or a 2,