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Method for accessing logic equipment utilizing ISCSI agreement

A logical device and logical technology, applied in the field of iSCSI protocol implementation, to achieve the effect of reducing complexity, reducing cost, and reducing storage cost

Inactive Publication Date: 2009-01-14
INVENTEC CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, if the server is for the purpose of performance, fault tolerance, scalability, or convenient management, it usually constructs some logical devices (or called virtual devices), such as reorganizing the hard disk into other methods (such as RAID), logical volumes, etc., and want to Provide these methods to users through the Module, which cannot be directly done in the iSCSI protocol

Method used

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  • Method for accessing logic equipment utilizing ISCSI agreement
  • Method for accessing logic equipment utilizing ISCSI agreement
  • Method for accessing logic equipment utilizing ISCSI agreement

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Embodiment Construction

[0068] As administrators of computer systems and storage devices are often plagued by ever-increasing data volumes and changing data storage requirements, many are beginning to consider virtual storage solutions. Virtual storage is the process of logically integrating a large number of different physical storage networks and devices into one logical device for management purposes, with the purpose of helping enterprises expand, centralize and simplify most storage devices. The invention uses the iSCSI protocol not only to be applied to the communication between physical devices, but also to realize the communication of logical devices such as logical volumes and Raid.

[0069] iSCSI allows us to use Ethernet to build IP storage area networks. In this way, iSCSI overcomes the limitations of direct-attached storage, allowing us to share storage resources across different servers and expand storage capacity without downtime. The iSCSI system sends a SCSI command from a SCSI card...

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Abstract

The invention is a method to access logic device using iSCSI protocol, able to implement data transmission from initiator to target, firstly giving a group of IDs and logic unit numbers (LUNs) to each target, then waiting for the initiator to connect with the target, after the connection happening and established, extracting SCSI protocol data unit (PDU) from the connection, extracting SCSI CDB from the SCSI PDU, after determining ID and device file corresponding to the LUN in the SCSI CDB, making corresponding treatment on the device file according to SCSI instruction and making corresponding response, and finally constructing the response into SCSI CDB and placing the SCSI CDB in the connection and returning the SCSI CDB to the initiator.

Description

technical field [0001] The invention relates to a method for realizing the iSCSI protocol, in particular to a method for using the iSCSI protocol to access logic devices. Background technique [0002] iSCSI (Internet Small Computer System Interface), or internet SCSI, is a standard for block transfer of data over Internet Protocol networks, especially Ethernet. Fundamentally, the iSCSI protocol is a method of transporting SCSI blocks of data with low latency across an IP network. [0003] SCSI (Small Computer System Interface) is a widely used technical standard for connecting hard drives and computers, and iSCSI is a technology that applies this technology to network connections. SCSI is a block-oriented client / server I / O protocol for communication between physical devices (such as drives, printers, computers, etc.). The device that sends a SCSI command is called an initiator, that is, the party that issues a data access request, usually a server or a user computer. The ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L29/06
Inventor 刘文涵陈玄同林宏旭
Owner INVENTEC CORP
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