Memory system with parity cache scheme and method of operating such memory system

Abstract

Within a memory system, architecture and operations for processing commands in a parity cache scheme support more open blocks taking into account cost and performance. Dynamic random access memory space holds parity buffers of all open blocks and communicates with a cache and cache controller. An open block queue (OBQ) accumulates commands in separate queues for each open block to increase cache hit rate. Open block counters keep track of the number of commands for each OBQ to facilitate arbitration. A unique identification (ID) is given for each open block.