Kabushiki Kaisha Toshiba

Toshiba Memory Corporation

Kioxia Corporation

International Business Machines Corporation

Sony Computer Entertainment Inc.

Other

Toshiba America Electronic Components, Inc.

Shigehiro Asano

Shinichi Kanno

Kazuhiro Fukutomi

Toshikatsu Hida

Kenichiro Yoshii

Hidenori Matsuzaki

Hirokuni Yano

Kazuya Kitsunai

Junji Yano

Takashi Yoshikawa

Charles Ray Johns

Neil Buxton

Julien Margetts

Tatsunori Kanai

James Allan Kahle

Hideaki Sato

Yutaka Yamada

Tsutomu Ishii

Kosuke Hatsuda

Steven E Wells

Masakazu Suzuoki

Thuong Quang Truong

Tetsuro Kimura

Takeshi Yamazaki

Atsushi Kunimatsu

Peichun Peter Liu

Takehiko Amaki

Mitsuo Saito

Shunichi Igahara

David Mui

Yohei Hasegawa

Mark Carlson

Daisuke Hashimoto

Harm Peter Hofstee

Jieming Qi

Michael Norman Day

Seiji Maeda

Kenichi Maeda

Toshio Okamoto

Michael Fan Wang

Jeffrey Douglas Brown

Katsuhiko Ueki

Alvan Wing Ng

Hiroshi Nozue

Philip Rose

Hideo Segawa

Martin Edward Hopkins

Matthew Edward King

Mark Hayashida

Shin Sungho

Hiroyuki Nagashima

Tokumasa Hara

Tatsuya Mori

Hiroshi Yao

Masahiro Ishiyama

Hirofumi Muratani

Yukio Watanabe

Masaki Suzuki

Akira Yamaga

Takeshi Aikawa

Paul Edward Hanham

Yasuhiro Kimura

Shigeaki Iwasa

Ikuo Uchihori

Yoshiki Saito

Shohei Onishi

Shinya Amano

Jiro Amemiya

Satoru Hashimoto

Masayuki Takakuwa

Kazumasa Yamamoto

Tsutomu Ishli

Shouzou Isobe

Hida Toshikatsu

According to one embodiment, a write instructing unit instructs a data access unit to write, in a storage area of a data storage unit indicated by a first physical address, write object data, instructs a management information access unit to update address conversion information, and instructs a first access unit to update the first physical address. A compaction unit extracts a physical address of compaction object data, instructs the data access unit to read the compaction object data stored in a storage area of the data storage unit indicated by the physical address, instructs the data access unit to write the compaction object data in a storage area of the data storage unit indicated by a second physical address, instructs the management information access unit to update the address conversion information, and instructs a second access unit to update the second physical address.

Controller for controlling non-volatile semiconductor memory and method of controlling non-volatile semiconductor memory

A semiconductor storage device includes a first memory area configured in a volatile semiconductor memory, second and third memory areas configured in a nonvolatile semiconductor memory, and a controller which executes following processing. The controller executes a first processing for storing a plurality of data by the first unit in the first memory area, a second processing for storing data outputted from the first memory area by a first management unit in the second memory area, and a third processing for storing data outputted from the first memory area by a second management unit in the third memory area.

Semiconductor storage device with volatile and nonvolatile memories to allocate blocks to a memory and release allocated blocks

Example implementations include a method of receiving a host command identifier associated with a host command, determining a device command associated with the host command and a memory controller device, receiving a device command timestamp corresponding to a time of the determining the device command, and determining a debug record contemporaneously with the determining the device command, the debug record including the host command identifier, a device command identifier associated with the device command, and the device command timestamp. Example implementations also include a device operably coupled to a memory array, and with a memory controller device configured to receive a host command identifier associated with a host command, and configured to determine a device command associated with the host command and a memory controller device, and a debug record generator device operatively coupled to the memory controller device and configured to receive a device command timestamp corresponding to a time of the determined device command, and configured to determine a debug record contemporaneously with the determining the device command, the debug record including the host command identifier, a device command identifier associated with the device command, and the device command timestamp.

Device and method for high performance memory debug record generation and management

A memory system comprises a nonvolatile memory having a plurality of memory cells and a memory controller for controlling the nonvolatile memory. The plurality of memory cells is divided into different groups, and each group is assigned a threshold read count value from a predetermined range of read count values. The memory controller includes a counter which tracks a read count for each group, a determination circuit configured to compare the read count for each group tracked by the counter to the assigned threshold read count value for the group, and a nonvolatile memory read/write circuit configured to read data from the group when the determination circuit indicates the read count for the group has reached the assigned threshold read count value.

Memory system and memory control method

A data storage device capable of namespace re-sizing comprises a nonvolatile semiconductor storage device containing data accessed via a logical address that includes a namespace identifier and a logical block address, and a controller. The storage device can convert the namespace identifier to a base address using a first look up table. The storage device can further convert the logical block address to namespace allocation units of storage. The storage device can also determine a pointer using the base address, the namespace allocation units, and a second look up table. Further, the storage device can determine a full logical cluster address using the pointer.

Namespace re-sizing

A method of managing errors in a plurality of storage drives includes receiving, at a memory controller coupled to at least one storage medium in an SSD, a read command from a host interface. The method also includes retrieving, from the storage medium, read data corresponding to a plurality of data chunks to be retrieved in response to the read command, and determining that at least one data chunk of the plurality of data chunks is unable to be read, the at least one data chunk corresponding to a failed data chunk. And in response to determining the failed data chunk, sending to the host interface the read data including the failed data chunk or excluding the failed data chunk. And in response to the read command sending to the host interface status information about all data chunks.

Media error reporting improvements for storage drives

According to one embodiment, a memory system includes a nonvolatile memory and a controller. The controller selects, as a write mode, at least one of a first mode in which N-bit data is written per memory cell in the nonvolatile memory and a second mode in which M-bit data is written per memory cell in the nonvolatile memory as a write mode. N is equal to or larger than one. M is larger than N. The controller selects the second mode when a reception speed of data, which is received in accordance with acceptance of one or more write commands from the host, is equal to or slower than a threshold, and selects the first mode when the reception speed is faster than the threshold.

Memory system and method

A storage device includes a nonvolatile memory including a plurality of physical blocks, a communication interface connectable to a host, and a controller. The controller is configured to generate metadata of host data, which include user data and metadata of the user data, and write, in a physical block of the nonvolatile memory, the metadata of the host data, the metadata of the user data, and the user data continuously in this order, when the host data are received through the communication interface in association with a write command.

Reconstruction of address mapping in a host of a storage system

Growing community of inventors

Kanagawa, Japan

Shigehiro Asano