Patent ID: 6467022
Filing Date: 2002-10-15
Classification: G06F

Abstract:
A method for distributing, between a host bus adapter and a solid state disk, the execution staging of a write command issued from a host processor to a parity protected disk drive array, the host bus adapter providing an interface between a host system bus and a direct access storage device bus, the solid state disk coupled on the direct access storage device bus side of the host bus adapter, said method comprising:extending nonvolatile memory of the host bus adapter by storing a range of memory addresses of the solid state disk within the host bus adapter; responsive to the host bus adapter receiving a write command and associated write data from the host processor: sending the write command directly from the host bus adapter to a data drive within the parity protected disk drive array; and sending the associated write data from the host bus adapter to the solid state disk; retrieving the associated write data directly from the solid state disk into the data drive; and completing subsequent data and instruction transfers between the solid state disk and the parity protected disk drive array using XDWRITE, XDREAD and XPWRITE commands.