Abstract: Access to a flash memory device may be virtualized by creating a mapping between logical sector numbers and physical memory location. Algorithms may be used to deprecate old sectors and to reclaim both data blocks and mapping blocks. Thus, Flash sector management may be implemented using limited amounts of RAM.

Abstract: An emulated file allocation table for a NOR flash memory may provide features that improve the performance or efficiency of the file allocation process. For example, the emulated file allocation table may include a slot or field which provides the information needed to convert from logical numbers to physical addresses. In some embodiments, this may reduce the demands on the system random access memory. In addition, the table may provide an entry which accommodates for deletion or replacement of sectors. In particular, it may provide a pointer for where to go in such circumstances. The provision of such a slot or field may reduce or eliminate the need to rewrite the file allocation table each time a cluster is replaced or deleted.

Abstract: A method, device and system for determining whether a prior shut down of a device having a solid state non-volatile memory unit such as a flash memory unit resulted from a power loss and disorderly shut down and whether a power loss recovery procedure should be run.

Abstract: According to some embodiments, power loss recovery information related to an active operation is stored in volatile memory. Upon detection of a power loss condition, the power loss recovery information is copied to non-volatile memory. Upon a return of power, the power loss recovery information is used to complete or correct the interrupted operation.

Abstract: A flash memory file system includes fragments and headers. The headers have a reduced number of states.

Abstract: A technique for coalesced PLR status bits in an ECC enabled flash memory.