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Device with dual write-in functions and memory control device

A storage control and function technology, applied in the memory system, input/output to record carrier, memory address/allocation/relocation, etc., can solve the problem of reducing the degree of freedom of data allocation, increase the degree of freedom, and achieve effective use Effect

Inactive Publication Date: 2009-03-25
FUJITSU LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, such double writing severely restricts data allocation (data layout) in the cache memory, thereby reducing the degree of freedom of data allocation, thus creating a useless area in the cache memory

Method used

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  • Device with dual write-in functions and memory control device
  • Device with dual write-in functions and memory control device
  • Device with dual write-in functions and memory control device

Examples

Experimental program
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Embodiment Construction

[0032] Embodiments of the present invention will be described below with reference to the drawings.

[0033] FIG. 1 is a block diagram showing the minimum basic structure of a storage device (storage control unit) according to an embodiment of the present invention. In FIG. 1, a storage device generally indicated by reference numeral 1 is designated to write data from the host 4 or to read data requested by the host 4 in accordance with an access (input / output request, I / O request) from the host 4. , to send it to host 4. The storage device 1 is composed of a disk unit (physical device) 2 and a storage control unit (storage control device) 3 disposed between the disk unit 2 and a host 4 for controlling access from the host 4 to the disk unit 2 .

[0034] The storage control unit 3 is composed of a disk interface module 10 , a host interface module 20 , a management module 30 and a PCI bridge module 20 . In the storage control unit 3 having the minimum basic structure shown i...

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PUM

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Abstract

The invention discloses a dual-writing device and storage control device, which is characterized by the following: the host interface mode (20) generates the addressing information of two designated writing objects; the bridge mode (40) generates two conveying address and writing address for high-speed storage (31); the writing data is transmitted into the corresponding two management mode (30), which is written in the address writing part of high-speed storage (31).

Description

technical field [0001] The present invention relates to a device having a double write function (multiple write function) that can write data transferred from an external device such as a host into two or more cache memories, and more particularly relates to a A storage control unit between a device (for example, a disk unit) and a host to control the host's access to the physical device. The present invention is suitable for use in RAID (Redundant Array of Inexpensive Disks). Background technique [0002] Generally, a storage device used as an external storage unit is connected to a host (computer) through a network or the like. This storage device is used to write data from the host to a physical device (for example, a disk unit) or read data requested by the host from the physical device according to the access from the host (input / output request, I / O request). This storage device is composed of a disk unit and a storage control unit located between the disk unit and th...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06F3/06G06F12/08G06F12/0831
Inventor 木村修小川裕一羽根田光正小林明人内田幸治高津一马长岛克彦
Owner FUJITSU LTD