Samsung Electronics Co., Ltd.

Seong-Jun Ahn

Jung-Hwan Kim

Young-Ho Park

Kyung-Min Park

Chan-Ik Park

Chan-ho Park

Hyun-Jin Choi

Hee-Won Lee

Hyung-gyu Lee

Sung-Hwan Bae

In-Hwan Doh

Young-bong Kim

Sang-kwon Moon

Jong-youl Lee

Young-il Seo

Min-cheol Kwon

Sine Kim

In an operating method of a memory controller, the memory controller includes a logical-to-logical (L2L) mapping table including mapping information between a first logical area and a second logical area and a logical-to-physical (L2P) mapping table including mapping information between the second logical area and a physical area of a memory device. The operating method includes receiving a first logical address of the first logical area and a first command for changing the L2L mapping table to access first data stored in the memory device through the first logical address, detecting a second logical address of the second logical area mapped to a physical address of the physical area in which the first data is stored, in response to the first command, and changing the L2L mapping table to map the first logical address to the second logical address.

Memory controller, nonvolatile memory system, and operating method thereof

Fast reuse memory block detection methods and memory block management methods using the same are provided. A fast reuse memory block detection method may include selecting a memory block from memory blocks included in a nonvolatile memory device as a reference block at an initially set period, managing one of an erase time and a program time of the reference block, and determining whether other memory blocks are fast reuse memory blocks, based on a use period that is determined according to the managed one of the erase time and the program time of the reference block.

Methods of detecting fast reuse memory blocks and memory block management methods using the same

A memory apparatus includes first memory chip and second memory chip; and a control unit configured to manage a global reserved area, a first virtual area for the first memory chip, and a second virtual area for the second memory chip, wherein the first virtual area includes a first user area and a first reserved area, the second virtual area includes a second user area and a second reserved area, the global reserved area includes a first plurality of reserved blocks corresponding to the first reserved area and a second plurality of reserved blocks corresponding to the second reserved area, and the control unit is configured to assign a second virtual block included in the global reserved area to the first user area if the control unit detects a first virtual block included in the first user area is a bad block.

Memory apparatus

A Least Significant Bit (LSB) page recovery method used in a multi-level cell (MLC) flash memory device includes setting first through nLSB page groups (n being a natural number that is larger than 2) comprising at least two LSB pages from among the LSB pages included in the MLC flash memory, programming the first through xLSB pages (x is a natural number that is larger than 2) included in an iLSB page group (i is a natural number that is smaller than n), generating and storing an iLSB parity page for the first through xLSB pages, programming first through xMSB pages which correspond to one LSB page from among the first through xLSB pages, and recovering a jLSB page, which are paired with a jMSB page, using the iLSB parity page corresponding to the iLSB page group, when a power supply to the MLC flash memory is stopped during the programming of the jMSB page (j is a natural number that is smaller than x).

Least significant bit page recovery method used in multi-level cell flash memory device

A method of prefetching data in a hard disk drive includes searching for a logic block address (LBA) of data requested by an external apparatus in a history of a non-volatile cache of the hard disk drive, and if the LBA of the data is stored in the history, storing data recorded in a LBA stored after the LBA of the data requested by the external apparatus from among LBAs stored in the history in a buffer of the hard disk drive.

Method of prefetching data in hard disk drive, recording medium including program to execute the method, and apparatus to perform the method

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Seoul, South Korea

Seong-Jun Ahn