Interleaving data across corresponding storage groups

摘要

A data processing apparatus includes a first memory that has first storage areas, a capacity of each first storage area being variable, a second memory that has second storage areas, a capacity of each second storage area being variable, and each second storage area is redundant to a first storage area corresponding to a second storage area, a memory controller that stores data stored in each first storage area to the corresponding second storage area, and writes data stored in a second storage area to the corresponding varied first storage area and writes data stored in a first storage area to the corresponding varied second storage area when capacities of the first storage area and the second storage areas are varied.

主权项

1. A data processing apparatus comprising:
a first group of storage areas having data interleaved across the first group of storage areas; a second group of storage areas having a mirrored correspondence with the first group of storage areas having data interleaved across the second group of storage areas; a memory controller that reads data from the first group of storage areas when a change is made to the first group of storage areas, selectively writes the data to the second group of storage areas so the data is interleaved across the storage areas of the second group accounting for a change of the second group of storage areas which mirrors the changed first group of storage areas, and interleaves data read from the second group of storage areas across the first group of storage areas in accordance with the change to the first group of storage areas.