1. A method for operating a memory system, comprising: providing a sequential update block and preexisting data associated with the sequential update block; providing an option to convert the sequential update block to a chaotic update block; receiving a write command to write data following a previous write command, the write command and the previous write command having a discontinuity in logical addresses; writing the data to the sequential update block if a logical address of the write command is different from logical addresses of the preexisting data; and converting the sequential update block to a chaotic update block if the logical address of the write command matches one of the logical addresses of the preexisting data.