hesela.devRestricted copyback
Restricted copyback limits consecutive NAND-internal relocations before requiring an off-chip error-corrected copy.
Hong et al. derive thresholds from wear and retention characterization of 1x-nm MLC NAND. Their rcFTL groups destination blocks by copy count and returns corrected off-chip moves to count zero. This counter records copy history, not cell wear. [1]
Relations
- related
- NAND copyback, Program/erase cycle, Flash data retention, Error-correcting code, Garbage collection (flash), Flash translation layer (FTL)
Limitations
- The tested chip population and emulated performance do not specify a safe threshold for another NAND part. [1]