Genesys Logic, Inc.

Yuan-hao Chang

Tei-Wei Kuo

Jen-Wei Hsieh

Cheng-Chih Yang

Yi-Lin Tsai

Chia-Lin Chang

Hsiang-chi Hsieh

Po-chun Huang

Yuan-sheng Chu

Jen-wie Hsieh

Po-Liang Wu

Yung-feng Lu

Hsiang-Chi Hsieh

A flash memory system and managing and collecting methods for flash memory with invalid page messages thereof are described. When the valid data pages of the flash memory are changed to invalid data pages, a recording area is used to record the message of the invalid data pages to effectively collect the occupied space of the invalid data pages in the flash memory. Further, while garbage collecting step is performed, a block is rapidly selected according to the message of the recording area and the valid data pages in the selected block are correctly identified, copied and removed.

Flash memory system and managing and collecting methods for flash memory with invalid page messages thereof

A method for performing a static wear leveling on a flash memory is disclosed. Accordingly, a static wear leveling unit is disposed with a block reclamation unit of either a flash translation layer or a native file system in the flash memory, and utilizes less memory space to trace a distribution status of block leveling cycles of each physical block of the flash memory. Based on the distribution record of the block leveling cycles, the number of the leveling cycles less than a premeditated threshold would be found while the system idles. Then the static wear leveling unit requests the block reclamation unit to level the found blocks. Before leveling the found block, the rarely updated data is compelled to move from one block to another block which is leveled frequently, whereby accurate wear leveling cycles for the blocks can be averaged extremely.

Method for performing static wear leveling on flash memory

A management method for reducing the utilization rate of random access memory (RAM) while reading data from or writing data to the flash memory is disclosed. A physical memory set is constructed from a plurality of physical memory blocks in the flash memory. A logical set is constructed from a plurality of logical blocks wherein the data stored in the logical set are stored in the physical memory set. Further, the data stored in each of the logical blocks are stored in one number of physical memory blocks. A mapping table is constructed and includes a hash function, a logical set table, a physical memory set table, and a set status table for managing the relationship among the physical memory sets, physical memory blocks, and logical blocks while reading data from or writing data to the flash memory. Further, the management method operates and maintains the physical memory sets, the physical memory blocks, and the logical blocks at a set level so that the utilization rate of random access memory is reduced to decrease the access capacity of the random access memory while operating the physical memory blocks and the logical blocks of the flash memory.

Management method for reducing utilization rate of random access memory (RAM) used in flash memory

A cache device comprises a hard disk, cache control unit and at least one flash memory, whereby the cache control unit controlling and regulating the flash memory as the hard disk cache device. The present invention method is defined by setting up a management table to manage each corresponding logical block address of the flash memory through a cache data read-out step and cache data write-in step in order to manage the cache read or write action of the flash memory on the hard disk. In addition, the step of recycling a cache space and replacing cache temporary data storage is to remove and replace temporary cache and storage space within the flash memory on the hard disk. Moreover, the step of reconstruction management table is provided to reconstruct management table loss or damage caused by power outage or irregular shut-down of the computer and will be able to provide flash memory on the hard disk cache control.

Device and method for using a flash memory as a hard disk cache

A system and a method for configuration and management of flash memory is provided, including a flash memory, a virtual memory region, and a memory logical block region. The flash memory includes a plurality of physical erase units. Each physical erase unit is configured to include at least a consecutive segment, and each segment is configured to include at least a consecutive frame. Each frame is configured to include at least a consecutive page. Each virtual memory region is configured to include a plurality of areas, and each area is configured to include at least a virtual erase unit. The memory logical block region is configured to include a plurality of clusters, and each cluster includes at least a consecutive memory logical block. By forming correspondence among the physical erase unit, segment, frame, page, virtual erase unit, area, memory logical block and cluster to control the data access to the flash memory, the present invention achieves the reconfiguration and management of memory consumption and access efficiency for the flash memory.

Growing community of inventors

Tainan, Taiwan

Yuan-hao Chang