Patent ID: 8954823
Filing Date: 2015-02-10
Classification: G06F,G11C

Abstract:
1. A method for data storage, comprising: in a memory that includes at least N memory units, defining a mapping between logical addresses and respective physical storage locations in the at least N memory units; selecting a set of N logical addresses, which are mapped to N respective physical storage locations in different ones of the memory units, such that K of the logical addresses in the set of N logical addresses, 1≦K<N, are assigned for data storage and N-K logical addresses in the set of N logical addresses, other than the K logical addresses, are assigned for storing redundancy information; accepting data for storage in the K logical addresses in the set of N logical addresses; computing the redundancy information for the data; storing the data in the K logical addresses at a first storage density; and storing the redundancy information in the N-K logical addresses at a second storage density that is lower than the first storage density.