公开(公告)号：US11379301B2

公开(公告)日：2022-07-05

申请号：US16825148

申请日：2020-03-20

Applicant: Seagate Technology LLC

Inventor： Earl T. Cohen

IPC: G06F11/10

Abstract: Higher-level redundancy information computation enables a Solid-State Disk (SSD) controller to provide higher-level redundancy capabilities to maintain reliable operation in a context of failures of non-volatile (e.g. flash) memory elements during operation of an SSD implemented in part by the controller. For example, a first computation is an XOR, and a second computation is a weighted-sum. Various amounts of storage are dedicated to storing the higher-level redundancy information, such as amounts equivalent to an integer multiple of flash die (e.g. one, two, or three entire flash die), and such as amounts equivalent to a fraction of a single flash die (e.g. one-half or one-fourth of a single flash die).

公开(公告)号：US10936251B2

公开(公告)日：2021-03-02

申请号：US16684027

申请日：2019-11-14

Applicant: Seagate Technology LLC

Inventor： Earl T. Cohen ,  Timothy L. Canepa

IPC: G06F3/06 ,  G06F12/00 ,  G06F12/1027

Abstract: Methods, systems, and computer-readable storage media for a storage device to, upon receiving a command from a computing host, determine whether or not the command includes location information targeting a particular portion of a NVM of the storage device, the location information having been retrieved by the computing host from a shadow map and included with the command. Upon determining that the command includes location information, the command is processed by the storage device using the included location information. Upon determining that the command does not include location information, the storage device determines the particular portion of the NVM targeted by the command based on a map stored in a memory of the storage device before processing the command.

公开(公告)号：US10740011B2

公开(公告)日：2020-08-11

申请号：US15946891

申请日：2018-04-06

Applicant: Seagate Technology LLC

Inventor： Earl T. Cohen

IPC: G06F3/06 ,  G06F12/02 ,  G06F12/1009

Abstract: Methods for determining, by a storage controller, a read unit address and encoded length information of one of the plurality of read units of a non-volatile memory (NVM) based at least in part on a page address of a particular one of a plurality of pages in a storage space address. The encoded length information may be decoded. The storage controller may determine a span specifying an integer number of the read units and a length in units having a finer granularity than the read units based at least in part on the page address. The storage controller may read data associated with the particular page based at least in part on the read unit address and the span. The storage controller may update space usage information of the NVM based at least in part on the length.

公开(公告)号：US10467093B2

公开(公告)日：2019-11-05

申请号：US15402773

申请日：2017-01-10

Applicant: Seagate Technology LLC

Inventor： Jeremy Isaac Nathaniel Werner ,  Earl T. Cohen

IPC: G06F11/00 ,  G06F11/10 ,  G06F3/06 ,  G06F11/20 ,  G11C29/52

Abstract: Methods, systems and computer-readable storage media for programming, by a storage controller, particular data stored in an allocated buffer to a particular one of a plurality of non-volatile memories (NVMs). Redundancy information may be updated sufficient to recover from failures of the plurality of NVMs. The allocated buffer may be freed prior to and independent of the particular NVM completing the programming. The particular data may continue to be programmed independent of freeing the allocated buffer. The continuing of the programming of the particular data may include determining whether there are any failures of the programming the particular data.

公开(公告)号：US10460818B2

公开(公告)日：2019-10-29

申请号：US15472793

申请日：2017-03-29

Applicant: Seagate Technology LLC

Inventor： Earl T. Cohen ,  Hao Zhong

IPC: G11C16/34 ,  G11C16/04 ,  G11C16/26 ,  G01R19/00 ,  G11C29/02 ,  G11C16/28 ,  G11C7/14

Abstract: Methods, systems and computer-readable storage media for selecting a retention drift predictor scheme, reading retention drift history associated with reference cells of a plurality of groups of pages of a non-volatile memory (NVM), and predicting values for an optimal read threshold voltage of at least some of the plurality of groups of pages. The predicting of values for an optimal read threshold voltage may be based at least on the selected retention drift predictor scheme and the read retention drift history.

公开(公告)号：US10346312B2

公开(公告)日：2019-07-09

申请号：US15338718

申请日：2016-10-31

Applicant: Seagate Technology LLC

Inventor： Earl T. Cohen

IPC: G06F12/1009 ,  G06F12/02 ,  G06F11/10 ,  G11C29/52 ,  G11C16/08 ,  G06F3/06 ,  G06F12/10 ,  G11C29/04 ,  G06F12/04

Abstract: A method for using a variable-size flash translation layer. The method includes reading an entry in a map based on a read logical block address in a read request to obtain both a physical address of a particular page in a memory and information regarding compressed data with a variable size; converting the information to both an address in the particular page and a number of read units in the memory that contain the compressed data; and reading the compressed data from at least the particular page in the memory based on the address and the number of read units.

公开(公告)号：US10061727B2

公开(公告)日：2018-08-28

申请号：US15245852

申请日：2016-08-24

Applicant: Seagate Technology LLC

Inventor： Timothy Lawrence Canepa ,  Earl T. Cohen

IPC: G06F13/36 ,  G06F13/362 ,  G06F13/364 ,  G06F13/16 ,  G06F3/06 ,  G06F13/42 ,  G06F13/00

CPC classification number: G06F13/362 ,  G06F3/0611 ,  G06F3/0659 ,  G06F3/0688 ,  G06F13/1642 ,  G06F13/364 ,  G06F13/4282

Abstract: A paired queue apparatus and method comprising request and response queues wherein queue head and tail pointer update values are communicated through an enhanced pointer word data format providing pointer indicator information and optional auxiliary information in a single transfer, wherein auxiliary information provides additional system communication without consuming additional bandwidth. Auxiliary information is optionally contained in a response data entry written to a response queue or in a request entry written to a request queue.

公开(公告)号：US09851910B2

公开(公告)日：2017-12-26

申请号：US14942475

申请日：2015-11-16

Applicant: Seagate Technology LLC

Inventor： Earl T. Cohen ,  Timothy L. Canepa

IPC: G06F12/00 ,  G06F3/06 ,  G06F12/02

CPC classification number: G06F3/0619 ,  G06F3/0616 ,  G06F3/0634 ,  G06F3/0644 ,  G06F3/0655 ,  G06F3/0688 ,  G06F12/00 ,  G06F12/0246 ,  G06F12/0292 ,  G06F2212/7206 ,  G06F2212/7207 ,  G06F2212/7208 ,  G06F2212/7211 ,  Y02D10/13

Abstract: Method and apparatus for managing data in a Non-Volatile Memory (NVD). In some embodiments, management information is stored in a buffer memory using a Solid-State Disk (SSD) controller circuit, the management information comprising a map data structure that associates storage addresses of a host device to physical addresses of the NVD. A location in the management information is determined responsive to a selected host storage address and a programmable parameter by arithmetically dividing in accordance with a divisor specified at least in part by the programmable parameter. The location in the management information is used to direct a transfer of user data by the SSD control circuit between the host device and the NVM.

公开(公告)号：US20170147435A1

公开(公告)日：2017-05-25

申请号：US15402773

申请日：2017-01-10

Applicant: Seagate Technology LLC

Inventor： Jeremy Isaac Nathaniel Werner ,  Earl T. Cohen

IPC: G06F11/10 ,  G06F3/06 ,  G11C29/52

CPC classification number: G06F11/1068 ,  G06F3/061 ,  G06F3/0619 ,  G06F3/064 ,  G06F3/0656 ,  G06F3/0679 ,  G06F3/0688 ,  G06F11/1044 ,  G06F11/108 ,  G06F11/2056 ,  G11C29/52

Abstract: Methods, systems and computer-readable storage media for programming, by a storage controller, particular data stored in an allocated buffer to a particular one of a plurality of non-volatile memories (NVMs). Redundancy information may be updated sufficient to recover from failures of the plurality of NVMs. The allocated buffer may be freed prior to and independent of the particular NVM completing the programming. The particular data may continue to be programmed independent of freeing the allocated buffer. The continuing of the programming of the particular data may include determining whether there are any failures of the programming the particular data.

公开(公告)号：US09582359B2

公开(公告)日：2017-02-28

申请号：US14963723

申请日：2015-12-09

Applicant: Seagate Technology LLC

Inventor： AbdelHakim S. Alhussien ,  Erich F. Haratsch ,  Earl T. Cohen ,  Yunxiang Wu

IPC: G06F11/10 ,  G11C29/52 ,  H03M13/45 ,  G11C7/10 ,  G11C11/56 ,  G11C16/10 ,  G11C27/00 ,  H03M13/25 ,  H03M13/29 ,  G06F11/32 ,  H03M13/11 ,  H03M13/15

CPC classification number: G06F11/0793 ,  G06F3/0619 ,  G06F3/064 ,  G06F3/0679 ,  G06F11/0727 ,  G06F11/0751 ,  G06F11/079 ,  G06F11/1068 ,  G11C7/1006 ,  G11C11/5628 ,  G11C16/10 ,  G11C16/26 ,  G11C27/005 ,  G11C29/52 ,  H03M13/1102 ,  H03M13/152 ,  H03M13/256 ,  H03M13/2906 ,  H03M13/45 ,  H03M13/458

Abstract: An apparatus having mapping and interface circuits. The mapping circuit (i) generates a coded item by mapping write unit bits using a modulation or recursion of past-seen bits, and (ii) calculates a particular state to program into a nonvolatile memory cell. The interface circuit programs the cell at the particular state. Two normal cell states are treated as at least four refined states. The particular state is one of the refined states. A mapping to the refined states mitigates programming write misplacement that shifts an analog voltage of the cell from the particular state to an erroneous state. The erroneous state corresponds to a readily observable illegal or atypical write sequence, and results in a modified soft decision from that calculated based on the normal states only. A voltage swing between the particular state and the erroneous state is less than between the normal states.

Abstract translation: 具有映射和接口电路的装置。 映射电路（i）通过使用过去位的调制或递归映射写入单元比特来生成编码项，并且（ii）计算特定状态以编程到非易失性存储单元中。 接口电路在特定状态下对单元进行编程。 两个正常的细胞状态被视为至少四个精细状态。 特定状态是精细状态之一。 对精细状态的映射减轻了将单元的模拟电压从特定状态转移到错误状态的编程写入错位。 错误状态对应于易于观察的非法或非典型写入序列，并且导致仅基于正常状态计算出的修改的软判决。 特定状态和错误状态之间的电压摆动小于正常状态之间的电压摆动。