公开(公告)号：US10127157B2

公开(公告)日：2018-11-13

申请号：US14843632

申请日：2015-09-02

Applicant: SK hynix Inc.

Inventor： Xiangyu Tang ,  Frederick K. H. Lee

IPC: G06F12/08 ,  G06F12/0871

Abstract: A total bytes written (TBW) requirement associated with solid state storage is obtained. A size of a cache associated with the solid state storage is determined based at least in part on the TBW requirement. The size of the cache is adjusted to be the determined size

公开(公告)号：US09985647B2

公开(公告)日：2018-05-29

申请号：US15061650

申请日：2016-03-04

Applicant: SK hynix Inc.

Inventor： Frederick K. H. Lee ,  Marcus Marrow

IPC: H03M7/00 ,  H03M7/14 ,  H03M13/11 ,  H03M13/15 ,  H03M13/23 ,  H03M13/29

CPC classification number: H03M7/14 ,  H03M13/1102 ,  H03M13/1515 ,  H03M13/152 ,  H03M13/23 ,  H03M13/2957 ,  H03M13/2963

Abstract: Methods of encoding a near-symbol balanced (NSB) sequence may include selecting, with a controller, a constraint based on an amount of bits, determining, with the controller, a plurality of sections in a codebook based on permutations defined by the selected constraint, and partitioning, with the controller, a section among the plurality of sections into a plurality of partitions until each of the plurality of partitions include a number of entries equal to or less than a predetermined number of entries.

公开(公告)号：US10055168B2

公开(公告)日：2018-08-21

申请号：US15253123

申请日：2016-08-31

Applicant: SK hynix Inc.

Inventor： Frederick K. H. Lee ,  Xiangyu Tang ,  Lingqi Zeng

IPC: G06F12/00 ,  G06F3/06 ,  G06F13/16 ,  G11C16/10

CPC classification number: G06F3/0652 ,  G06F3/061 ,  G06F3/0616 ,  G06F3/0688 ,  G06F13/16 ,  G11C16/10

Abstract: Memory systems may include a memory storage, and a controller suitable for measuring a write amplification (WA) value of a first, current window, comparing the WA value for the first window with a previous WA value for a previous window, and calculating and setting a value of a ratio threshold based on the comparison of the WA value for the current window threshold to the WA value of the previous window threshold.

公开(公告)号：US10459635B2

公开(公告)日：2019-10-29

申请号：US15411786

申请日：2017-01-20

Applicant: SK Hynix Inc.

Inventor： Matthew Lewis Call ,  Frederick K. H. Lee ,  Johnny Lam ,  Stephen Silva

IPC: G06F12/00 ,  G06F3/06

Abstract: Window based mapping is used to reduce the usage of volatile memory for storing the mapping of logical to physical addresses for accesses to data in a flash drive. Two separate mapping tables for translation of logical addresses to physical addresses (L2P), e.g., an L2P front map and an L2P back map, are used where the L2P front map acts as a window to the L2P back map. The L2P front map has smaller granularity for data accesses than the L2P back map. The data accessed using the L2P front map can allow the flash drive to function with relatively same performance as a fully mapped drive with a single mapping table.

公开(公告)号：US10102146B2

公开(公告)日：2018-10-16

申请号：US15082990

申请日：2016-03-28

Applicant: SK hynix Inc.

Inventor： Shwetashree Virajamangala ,  Nagabhushan Hegde ,  Frederick K. H. Lee

IPC: G06F12/00 ,  G06F12/122 ,  G06F12/123 ,  G06F12/02 ,  G06F1/30

Abstract: Methods may include after a power loss, determining a most recently saved section of a logical block addressing (LBA) table, a previous section saved prior to the most recently saved section of the LBA table, and a least recently saved section of the LBA table, reading an open super block and updating entries in the LBA table from the most recently saved section through to the least recently saved section, reading a newest closed super block from a plurality of closed super blocks and updating entries in the LBA table from the previous section saved prior to the most recently saved section through to the least recently saved section, and reading an oldest super block and updating entries in the LBA table in the least recently saved section.

公开(公告)号：US09589673B1

公开(公告)日：2017-03-07

申请号：US14607890

申请日：2015-01-28

Applicant: SK Hynix Inc.

Inventor： Fan Zhang ,  Frederick K. H. Lee

IPC: G11C29/00 ,  G11C29/50 ,  G06F11/10

CPC classification number: G11C29/50004 ,  G06F11/1072 ,  G11C29/021 ,  G11C29/028 ,  G11C2029/5004

Abstract: A group of cells in solid state storage is sampled in order to obtain a sampled distribution associated with the group of cells. An axis of symmetry is determined using the sampled distribution. At least some portion of a conditional distribution is determined based at least in part on: (1) the sampled distribution and (2) the axis of symmetry. An optimal read threshold is estimated using the sampled distribution and the conditional distribution.

Abstract translation: 对固态存储器中的一组单元进行采样，以获得与该组单元相关联的采样分布。 使用采样分布确定对称轴。 至少部分地基于：（1）采样分布和（2）对称轴确定条件分布的至少一部分。 使用采样分布和条件分布来估计最佳读取阈值。

公开(公告)号：US10296452B2

公开(公告)日：2019-05-21

申请号：US15152352

申请日：2016-05-11

Applicant: SK hynix Inc.

Inventor： Frederick K. H. Lee ,  Xiangyu Tang ,  Lingqi Zeng ,  Yunhsiang Hsueh

IPC: G06F12/02 ,  G06F3/06

Abstract: Memory systems may include a memory including a plurality of blocks, and a controller suitable for determining a pool of blocks from the plurality of blocks as garbage collection (GC) victim block candidates based on a number of valid pages left in each of the plurality of blocks, and selecting a block from the pool of blocks having a minimum number of valid pages as a victim block for garbage collection.

公开(公告)号：US09390002B1

公开(公告)日：2016-07-12

申请号：US14065258

申请日：2013-10-28

Applicant: SK Hynix Inc.

Inventor： Hsiao-Heng Lee ,  Lingqi Zeng ,  Frederick K. H. Lee ,  Jason Bellorado

IPC: G06F12/00 ,  G06F12/02 ,  G11C16/34

CPC classification number: G06F12/0207 ,  G06F11/1012 ,  G06F11/34 ,  G11C11/5642 ,  G11C16/26 ,  G11C16/3431 ,  G11C2211/5641

Abstract: Information associated with a read to solid state storage is received, including a read number and a read value. The read value is written to a location in a cell and bin map, wherein (1) the location in the cell and bin map corresponds to the read number and (2) the cell and bin map tracks, for each cell in a group of cells, which bin out of a plurality of bins a given cell falls into.

Abstract translation: 接收与读取到固态存储相关联的信息，包括读取数字和读取值。 将读取值写入单元格和bin映射中的位置，其中（1）单元格和bin图中的位置对应于读取的数字，以及（2）单元格和bin地图轨道，对于一组 在给定单元落入多个箱中的单元格。

公开(公告)号：US09812193B2

公开(公告)日：2017-11-07

申请号：US14480988

申请日：2014-09-09

Applicant: SK Hynix Inc.

Inventor： Christopher S. Tsang ,  Frederick K. H. Lee ,  Xiangyu Tang ,  Zheng Wu ,  Jason Bellorado

IPC: G11C11/56 ,  G11C16/26 ,  G11C16/34

CPC classification number: G11C11/5642 ,  G11C16/26 ,  G11C16/3404

Abstract: A bit flip count is determined for each bin in a plurality of bins, including by: (1) performing a first read on a group of solid state storage cells at a first threshold that corresponds to a lower bound for a given bin and (2) performing a second read on the group of solid state storage cells at a second threshold that corresponds to an upper bound for the given bin. A minimum is determined using the bit flip counts corresponding to the plurality of bins and the minimum is used to estimate an optimal threshold.

公开(公告)号：US09342389B2

公开(公告)日：2016-05-17

申请号：US14169877

申请日：2014-01-31

Applicant: SK Hynix Inc.

Inventor： Xiangyu Tang ,  Frederick K. H. Lee ,  Jason Bellorado ,  Lingqi Zeng ,  Zheng Wu

IPC: G06F12/00 ,  G06F11/00 ,  G06F3/06 ,  G06F11/34 ,  G06F12/12

CPC classification number: G06F11/00 ,  G06F3/0616 ,  G06F3/064 ,  G06F3/0679 ,  G06F11/3409 ,  G06F11/3471 ,  G06F12/121

Abstract: An address is received. One or more neighbors associated with the received address is/are determined. One or more neighboring hot metrics is/are determined for the one or more neighbors associated with the received address. A hot metric for the received address is determined based at least in part on the neighboring hot metrics.

Abstract translation: 收到一个地址。 确定与所接收的地址相关联的一个或多个邻居。 确定与接收到的地址相关联的一个或多个邻居的一个或多个相邻热度量。 至少部分地基于相邻的热指标来确定接收地址的热度量。