The HPE Alletra 9000 NVMe-oF 100 GbE 2-port host bus adapter (HBA) is a versatile component that can be used for multiple purposes. While it is primarily designed for high-speed host connectivity, it can also be used for connecting extra drive enclosures to the HPE Alletra 9000 storage array. This flexibility allows it to serve dual roles depending on the specific requirements of the deployment, either expanding storage capacity by connecting additional enclosures or providing high-speed connectivity to hosts.
Reference:
HPE Alletra 9000 Overview
HPE NVMe-oF Solutions