A peripheral data storage subsystem is for use with a computer system. The computer system has a host PCI bus and a serial PCI host bus adapter coupled to the host PCI bus. The peripheral data storage subsystem includes a plurality of data storage devices and a data storage device to parallel PCI interface that is coupled to each of the data storage devices, a parallel PCI to serial PCI interface coupled to the data storage device to parallel PCI interface and a serial PCI link interconnect. The serial PCI link-interconnect couples the parallel PCI to serial PCI interface of the peripheral data storage subsystem to the serial PCI host bus adapter of the computer system.