Dedication of space in descriptor for minimizing data processing during communications between a peripheral device and a host system

摘要

A data storage device has a control block at a first location for storing control data generated by a host system to provide control information to a peripheral device. This control block includes a first predetermined location for storing predetermined data that is generated by the host system. The data storage device also includes a status block at a second location for storing the status data generated by the peripheral device to provide status information to the host system. In addition, the status block includes a second predetermined location for storing the predetermined data. The first location of the control block and the second location of the status block are separate and independent. The peripheral device reads the predetermined data from the control block to write the predetermined data into the second predetermined location within the status block. The host system then reads the predetermined data from the second predetermined location of the status block.