Patent ID: 6539463
Filing Date: 2003-03-25
Classification: G06F

Abstract:
A disk-array apparatus for use in combination with a host which serves as a data processing apparatus, said disk array apparatus comprising:a plurality of disk-medium modules, a plurality of memory modules, and a director module connected to said host, said disk-medium modules, and said memory modules; said director module configured to carry out data writing and reading operations to and from said disk-medium modules under control of said host and to temporarily store and load said data to and from said memory modules when said director module carries out said writing and said reading operations; said memory modules comprising a first through a fourth memory modules; said first and said second memory modules being combined with each other so as to serve as a first memory module-pair; said third and said fourth memory modules being combined with each other so as to serve as a second memory module-pair; said director module writing, when a failure occurs in said first memory module, fast-write data to said third and said fourth memory modules of said second memory module-pair and appointing two memory modules optionally selected from said second through said fourth memory modules for respectively serve as cache control regions.