Samsung Electronics Co., Ltd.

Dong-Hyun Song

Jang-Hwan Kim

Shea-Yun Lee

Young-Joon Choi

Myung-Jin Jung

Jung-Been Im

Bum-Soo Kim

Dong-kun Shin

Change-Hee Lee

Dong-Gi Lee

Hye-jeong Nam

Sung-Pack Hong

Sang-Lyul Min

Yeon-Jin Mo

Jae-Hyun Hwang

Jae-hyun Hwang

Chan-Ik Park

Young-Goo Ko

Jeong-Eun Kim

Jung-Yeon Yoon

Jeong-eun Kim

Change-hee Lee

Sang-Ryul Min

A memory system including non-volatile memory devices and a corresponding refresh method are disclosed. The method groups memory blocks of the non-volatile memory devices into memory groups, determines a refresh sequence for the memory groups, and refreshes the memory groups in accordance with the refresh sequence.

Nonvolatile memory system and refresh method

A non-volatile memory controller, system and method capable of processing a next request as an interrupt before completing a current operation are disclosed. The non-volatile memory system includes a first memory storing meta data loaded from a flash memory; a second memory storing the meta data copied from the first memory; and a flash memory controller copying the meta data from the first memory to the second memory, changing the meta data in the second memory, and then re-copying the changed meta data from the second memory to the first memory during a first-type operation that requires changes in the meta data.

Non-volatile memory controller processing new request before completing current operation, system including same, and method

A memory device detects and correct bit errors. The memory device includes cyclic redundancy check (CRC) and error correction code (ECC) circuits. The CRC circuit generates a write CRC code corresponding to data to be stored in memory cells. The ECC circuit generates an ECC code corresponding to the data and detecting and correcting a bit error of the data by means of the ECC code during a read operation. The CRC circuit generates a read CRC code corresponding to data corrected by the ECC circuit during the read operation, and detects a bit error of the data according to a comparison of the read CRC code and the write CRC code.

Memory device and bit error detection method thereof

A storage system is disclosed and related methods of reading/writing data are disclosed. The storage system includes a main data storage medium, and first and second buffers storing data to be stored on the main data storage medium, as well as a controller defining a data I/O path. The data I/O path may be defined in relation to a detected operating state of the main data storage medium.

Storage system, related data processing apparatus, and I/O method

A method is for recovering a block mapping table in a system including a flash memory device, where the block mapping table utilizes address mapping in accordance with a wear-leveling scheme. The method includes reading block arrangement information from the flash memory device for the wear-leveling scheme, restoring the block mapping table with reference to allocation block information included in the block arrangement information and scanning address allocation information included in spare regions of erased blocks of the flash memory device with reference to erased block information included in the block arrangement information and updating the block mapping table in accordance with the scanned address allocation information.

System with flash memory device and data recovery method thereof

An embodiment of a data storage apparatus includes a storage medium, a flash memory buffer configured to store write data to be written in the storage medium, and a controller configured to compare the amount of unused space in the flash memory buffer to a first reference value, compare the amount of valid data in the flash memory buffer to a second reference value, and in response to the comparisons, conducts either a block reclaim operation on the flash memory buffer or a buffer flush operation to transfer valid data from the flash memory buffer to the storage medium. An embodiment of a method for managing a data storage apparatus includes determining when to perform a reclaim operation on a nonvolatile memory buffer, and performing the reclaim operation by moving data either physically or virtually within the nonvolatile memory buffer.

Data storage apparatus with block reclaim for nonvolatile buffer

A data storage system includes a non-volatile memory, a disc recording medium, a non-volatile memory buffer, operatively disposed between a host interface and the non-volatile memory, which stores a portion of data stored in the non-volatile memory, and a disc buffer, operatively disposed between the host interface and the disc recording medium, which stores a portion of data stored in the disc recording medium. The data storage system may be configured to receive an access address from a host operatively connected to the host interface, and sequentially determine whether the access address exists in one of the non-volatile memory buffer, the non-volatile memory, the disc buffer, and the disc recording medium, in that order.

Data storage system including respective buffers for non-volatile memory and disc recording medium, and data access method thereof

Example embodiments provide a garbage collection method which includes applying a weight to each of at least two or more factors to calculate garbage collection costs. A hash table is configured using the calculated garbage collection costs. The method further includes searching a block having the lowest garbage collection cost from the hash table and performing garbage collection on the searched block.

Flash memory system and garbage collection method thereof

A hard disk drive is disclosed and related methods of reading/writing data are disclosed. The hard disk drive includes a disk serving as a main data storage medium, and first and second buffers storing data to be stored on the disk, as well as a controller defining a data I/O path in relation to a detected operating state of the hard disk drive.

Hard disk drive with reduced power consumption, related data processing apparatus, and I/O method

A storage apparatus using a non-volatile memory, which retains data even after power interruption, as its cache and a method of managing the same are provided. The storage apparatus includes a main storage medium, a non-volatile memory used as a cache of the main storage medium, a region of the non-volatile memory being divided into a fixed region and a non-fixed region according to whether or not data is fixed, and a block management unit managing physical blocks by means of virtual addresses, the physical blocks being allocated to the non-volatile memory.

Storage apparatus using non-volatile memory as cache and method of managing the same

Provided are a storage apparatus using a non-volatile memory as a cache and a method of operating the same, in which the non-volatile memory is used as the cache so as to preserve data even when electricity is interrupted. The storage apparatus using a non-volatile memory as a cache includes a main storage medium, the non-volatile memory being used as the cache of the main storage medium and having a stationary region and a non-stationary region divided according to whether data are fixed, and a block management unit managing blocks allocated in the non-volatile memory.

Storage apparatus and method for using a non-volatile cache memory organized into stationary and non-stationary circular regions

A memory system comprises a flash memory and a controller comprising a control logic circuit and a working memory storing a flash translation layer. The memory system performs a merge operation by selectively copying a page from a first block of the flash memory to a second block of the flash memory. Where the page is valid and marked as allocated according to a file allocation table stored in the flash memory, the page is copied to the second block. However, where the page is valid and marked as deleted in the file allocation table, the page is not copied to the second block.

Growing community of inventors

Yongin-si, South Korea

Dong-Hyun Song