Concurrent disk array management system implemented with CPU executable extension

A direct host-controlled disk array access management system connected between a host computer controlled by running an operating system program thereon and at least two independent concurrently operational disk arrays, each including a plurality of disks, the disk access management system comprising:

• a central processing unit (CPU) executable extension device directly accessible and executable by a CPU of said host computer wherein said CPU executable extension device implemented with a plurality of instruction sets of said operating system program for direct control by said CPU in running said operating system employing said instruction sets;
• a concurrent disk array interface device for interfacing with said concurrent disk arrays for performing disk accesses from said host computer to said disks;
• said CPU executable extension device being employed for initializing, configuring and controlling said concurrent disk array interface device in performing the concurrent disk accesses operations under direct control of said CPU of said host computer in running said operating system program employing said instruction sets;
• said CPU executable extension device includes an array basic input-output system (BIOS) for including a plurality of said instruction sets executable by said CPU of said host computer for performing said disk access operation;
• and
• said CPU executable extension device further includes a read only memory (ROM) for storing a plurality of configuration and initialization data therein to be employed by said CPU of said host computer for initializing, configuring and controlling said concurrent disk array interface device;
• said concurrent disk array interface device further including a state machine for each of said concurrent disk arrays for controlling the timing of the data transfers, and a pre-fetch control means for each of said concurrent disk arrays for controlling the pre-fetch of data to said data buffer.