Data merge method which reads first physical unit twice for respectively performing first stage programming operation and second stage programming operation on second physical unit, memory storage device and memory control circuit unit

摘要

An exemplary embodiment of the disclosure provides a data merge method for a memory storage device. The method comprises: performing a data merge operation to store valid data collected from a source node comprising at least one first physical unit to a recycling node comprising a second physical unit. The data merge operation comprises: reading a first data from the at least one first physical unit by a first reading operation; performing a first stage programming operation on the second physical unit according to the first data; reading the first data from the at least one first physical unit again by a second reading operation after the first stage programming operation is performed; and performing a second stage programming operation on the second physical unit according to the first data read by the second reading operation.