Patent ID: 7401255
Filing Date: 2008-07-15
Classification: G06F

Abstract:
1. A method for a primary computing system to restore at least a portion of storage at the primary computing system from a backup memory block on a backup computing system, the method comprising: an act of accessing backup block transformed data that represents a result of a deterministic many-to-one mapping function applied to the backup memory block as the memory block exists on the backup computing system; an act of accessing primary block transformed data that represents a result of the deterministic many-to-one mapping function applied to a corresponding primary memory block as it exists on the primary computing system, the corresponding primary memory block being at the same relative memory location on the primary computing system as the backup memory block on the backup computing system; an act of determining that the backup block transformed data does not match the primary block transformed data; and an act of restoring the primary memory block based on the determination that the backup block transformed data does not match the primary block transformed data.