US Patent 10275310 Updating exclusive-or parity data

A storage device may include a non-volatile memory; and a controller. The controller may be configured to store a plurality of blocks of data in the memory, determine exclusive-or (XOR) parity data for the plurality of blocks, and store the XOR parity data in the memory; store a second block of data in the memory. The controller may be further configured to generate updated XOR parity data by at least XORing a first block of the plurality of blocks and the second block of data with the XOR parity data to remove the first block from the XOR parity data and to add the second block to the XOR parity data, and store the updated XOR parity data in the memory.