METHOD AND DATA STORAGE APPARATUS FOR REPLACEMENT OF INVALID DATA BLOCKS DUE TO DATA MIGRATION

A data storage apparatus may include: a storage comprising a plurality of memory blocks; and a controller configured to: configure a write buffer pool by selecting a plurality of first memory blocks which are some of the plurality of memory blocks, manage remaining memory blocks except for the first memory blocks as second memory blocks, exclude one or more of the first memory blocks, whose data are migrated to the second memory blocks and add one or more of the second memory blocks to the write buffer pool.