Patent attributes
A data storage device includes a memory device and a controller coupled to the memory device. The controller is configured to relocate first valid data from a first source block to a destination block, relocate second valid data from a second source block to the destination block, determine that the destination block is closed, re-mark the first and second source block with a second indication, and erase the source blocks that have the second indication. The first source block and the second source block are marked with a first indication after each respective data is relocated. The first indication indicates that the source block cannot be freed. The second indication indicates that the destination block is closed and the associated source blocks can be erased. Prior to closing the destination block, parity data may be generated for the data of the destination block and programmed to the destination block.
