There are two device trays. One is attached in 3.5-inch expansion bay(2) at the
factory shipment, the other is included in this product. (Each components are
same feature size.)
If backup device is already installed in 3.5-inch expansion bay(2), the device tray
attached in this product will be used for battery installation.
If backup device is not installed in 3.5-inch expansion bay(2) yet, the device tray
attached in the server will be used for battery installation. In this case, please
store the device tray attached in this product for future use.