The NANDXtend^® technology, which is an advanced firmware technology exclusively developed by Silicon Motion, can extend operating lifetime. Conventional SSDs employ standard BCH and RS ECC (error correction coding) engines to initiate first-level correction using NAND shift-read-retries. In addition to this first-level error correction, FerriSSD^®s also implement a highly efficient second-level correction scheme using an LDPC (low-density parity-check) code and a group page RAID algorithm (a highly efficient redundant backup) to reduce potential dPPM at customer site while extending the service life of the SSD.