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flash components

A technology of components and flash memory, applied in memory systems, memory address/allocation/relocation, instruments, etc., can solve the problems of large control circuit size, difficulty in increasing storage capacity, and difficulty in data transmission

Active Publication Date: 2016-04-27
HITACHI LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] Therefore, if the storage capacity of the nonvolatile semiconductor storage device is to be increased, the size of the control circuit must be increased.
On the other hand, if the size of the control circuit is reduced, the number of nonvolatile chips that can be connected decreases, making it difficult to increase the storage capacity.
In addition, when connecting a large number of non-volatile chips, it is difficult to efficiently transfer data

Method used

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Embodiment Construction

[0031] Hereinafter, an embodiment will be described with reference to the drawings.

[0032] In addition, in the following description, in order to identify elements (for example, pages, flash memory chips (FM chips), switches (SW)), identification information including serial numbers is used, but identification information that does not include serial numbers may also be used. information.

[0033] In addition, in the following description, when the same type of element is to be described differently, a combination of an element name and identification information is used instead of a combination of an element name and a reference sign. For example, a switch whose identification information (identification number) is "0" may be expressed as "switch #0".

[0034] In addition, in the following description, an interface device may be abbreviated as "I / F".

[0035] In addition, in the following description, a flash memory (FM) is used as a nonvolatile semiconductor storage medi...

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PUM

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Abstract

The nonvolatile semiconductor storage system has: a plurality of nonvolatile semiconductor storage media; a control circuit having a medium interface group (one or more interface devices) connected to the plurality of nonvolatile semiconductor storage media; a plurality of switches . The media interface group and the plurality of switches are connected via a data bus, and each switch is connected to two or more nonvolatile chips via the data bus. The switch is configured to switch a connection between a data bus connected to the media interface group and a data bus connected to any one of the plurality of nonvolatile chips connected to the switch. The control circuit divides the data to be written into a plurality of data elements, switches connections by controlling a plurality of switches, and distributes the plurality of data elements to a plurality of nonvolatile chips.

Description

technical field [0001] The present invention relates to a storage system having a plurality of nonvolatile semiconductor storage media. Background technique [0002] Generally, a storage system provides a high-level device (for example, a host computer) with a logical volume generated based on a RAID (Redundant Array of Independent Disks: Redundant Array of Independent Disks) group composed of a plurality of storage devices. In recent years, nonvolatile semiconductor storage devices having a plurality of nonvolatile chips have been used in addition to or instead of HDDs (Hard Disk Drives) as storage devices. As a nonvolatile semiconductor storage device, for example, a flash memory having a plurality of flash memory chips (hereinafter referred to as FM chips) is used (for example, Patent Document 1). [0003] prior art literature [0004] patent documents [0005] Patent Document 1: Japanese Unexamined Patent Publication No. 2010-3161 [0006] In nonvolatile semiconducto...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06F13/16G06F12/00G06F12/06
CPCG06F3/0626G06F3/0635G06F3/0658G06F3/0688G06F13/1684G06F13/4022G06F12/0246G06F13/16G06F3/0685G06F3/0608G06F3/0647
Inventor 石川笃薗田浩二上原刚小川纯司小关英通
Owner HITACHI LTD