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Data accessing system and method capable of recognizing disk cache content validity

A cache and data access technology, applied in the field of data access methods, can solve the problem of disk 3 storing wrong data, etc., and achieve the effect of ensuring correctness

Inactive Publication Date: 2008-03-05
INVENTEC CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, after the failure of the main disk controller 1 is repaired, the main disk controller 1 also accesses the disk 3 according to the content recorded in the storage space 30, which may overwrite the correct data stored in the disk 3, causing the disk 3 Storing wrong data

Method used

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  • Data accessing system and method capable of recognizing disk cache content validity
  • Data accessing system and method capable of recognizing disk cache content validity

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Experimental program
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Embodiment

[0015] FIG. 2 is a schematic block diagram of the basic structure of the system implementing the data access method for identifying the validity of the disk cache content of the present invention. As shown in the figure, the data access system 4 that implements the data access method for identifying the validity of the disk cache content of the present invention is applied to the data access processing of disk arrays (Redundant Array of Independent Drivers; RAID), for simplicity The drawings and descriptions do not describe the same parts of the components shown in the data access system 4 of this embodiment and the existing data access system, and only the differences will be described below. In addition, the number of redundant disk controllers 2 of the data access system 4 in this embodiment may be two or more than the number shown in the drawing.

[0016] The disk 3' of the data access system 4 has a built-in recording area 32, which records the identification code of the ...

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Abstract

Disclosed are a system and a method for identifying content validity of disk high speed buffer of data accessing system. The system comprises: record area established in disk for recording the disk accessing identifier of being accessed by disk controller; boot-strap judge program for judging whether the record is recorded by main disk controller when reboot, the main disk controller saves its content if it is, otherwise its content is invalid. The main disk controller can easily judge the validity of current content stored in the storage space of the disk high speed buffer via the accessing identifying records established in the record area of disk, which resolves the problem of validity of disk high speed buffer content after switching accessing right of dual backup disk controller.

Description

technical field [0001] The present invention relates to a data access method for identifying the validity of disk cache content, in particular to a method for ensuring the validity (Valid) of disk cache content under a dual-standby disk controller, preventing the main After the disk controller failure is repaired due to the invalid disk cache content, the wrong data stored in the disk identifies the validity of the disk cache content. Background technique [0002] Network systems (such as the Internet, corporate intranet, or local area network, etc.) are designed to prevent server problems from affecting the service quality of client computers accessing server data. Therefore, most servers that provide services to client computers have at least one backup server. Backup server (Slaver), when the master server (Master) has a problem, the service is executed by the backup server. [0003] Furthermore, a Redundant Array of Independent Drivers (RAID) also uses dual redundant di...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06F12/08G06F11/10G06F12/0877
Inventor 陈志伟
Owner INVENTEC CORP