SYSTEM AND METHOD OF PROTECTING METADATA FROM NAND FLASH FAILURES

摘要

Methods and systems for protecting metadata from NAND flash failures work with data striped across multiple flash memory chips. The flash memory multiple chips may store multiple copies of metadata (and potentially ECC). The metadata stored in the multiple copies on the flash memory chips may be different from one another. For example, on a particular chip, a first copy of metadata is stored and a second copy of metadata is stored, with the second copy being a redundant copy of the metadata stored on a different chip. In this way, if one of the chips fails, a copy of the failed chips metadata is stored on another of the chips, and may be accessed.