A flash driver tracks data stored in a flash memory device through the use of
logical-to-physical
sector mapping. The mapping is stored in a data structure and allows data to be
written into the next free physical sector in the flash memory medium. Write operations
complete quickly, because there is no need to perform an erase operation in order
to write new data on to the flash memory medium. Data loss due to power interruption
during a write operation is also minimized by the described implementations. The
logical-to-physical sector mapping stored in data structure is backed-up on the
flash memory medium. In the event there is a catastrophic power interruption, logical-to-physical
sector mapping can easily be reestablished by scanning the backed-up mapping in
the flash memory medium. The backed-up information can be stored in a spare portion
of a NAND or NOR flash memory medium.
