Systems and methods disclosed herein provide an I/O prioritization scheme for NVMe-compliant storage devices. Through an interface of an HBA driver, a user specifies a range of LBAs that map to a namespace. The user interface also designates a priority level for the namespace. Once the namespace is created, the HBA driver generates a queue of the designated priority level. The HBA driver also generates a table that maps the queue to the namespace. When the HBA driver receives a request to perform an I/O command that targets the namespace, the HBA driver adds the requested command to the queue. I/O commands targeting the namespace are processed in accordance with the designated priority level by the controller.