Patent ID: 6219762
Filing Date: 2001-04-17
Classification: G06F

Abstract:
A storage means control method of updating data stored in first storage means on data stored in second storage means, the method comprising:causing first processing means to perform write processing in said first storage means;causing second processing means to perform write processing in said second storage means;causing first tag data control means to manage first tag data representing storage areas where said first processing means has performed write processing in said first storage means;causing second tag data control means to manage second tag data representing storage areas where said second processing means has performed write processing in said second storage means;causing priority data control means to manage priority data representing an order in which write requests are processed of each of said first and second processing means in units of storage areas of said second storage means;causing prevention data control means to generate and manage prevention data for preventing write processing in each storage area of said second storage means using the priority data stored in said priority data control means and the first and second tag data managed by said first and second tag data control means, respectively; andcausing processing data updating means to update the data written in said first storage means on said second storage means on the basis of the prevention data managed by said prevention data control means.