Method and device for reliable fault transferring non-complete RAID disc writing

A failover, reliable technique used in program control design, response to error generation, input/output process of data processing, etc.

Inactive Publication Date: 2004-03-10
IBM CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The data corruption failure is the result of a RAID controller 112 regenerating da

Method used

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  • Method and device for reliable fault transferring non-complete RAID disc writing
  • Method and device for reliable fault transferring non-complete RAID disc writing
  • Method and device for reliable fault transferring non-complete RAID disc writing

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Embodiment Construction

[0034] The invention is claimed and described herein by the term "module". As used herein, the term is used to refer to a line of software code instructions or electronic hardware configured to carry out a given purpose of a module. Thus, a module is a structural unit. More than one instruction may exist within a module, as is readily understood by those skilled in the art of software development. These instructions need not be contiguous, but may be interspersed among various parts of one or more software programs, including within different objects, routines, functions, and the like. Similarly, hardware components of a subsystem or module, such as integrated circuits, logic gates, discrete devices, etc., need not be organized into a single circuit, but may be distributed among one or more circuits. Unless otherwise indicated, hardware or software implementations may be used interchangeably to achieve the structures and functions of the disclosed modules.

[0035] Figure...

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Abstract

Disclosed is a system and a method for reliable failover involving incomplete redundant arrays of inexpensive disks (RAID) writes in clustering systems. The system comprises the restructuring of a mirror race table (MRT) and a storage location that may be a non-volatile random access memory (NVRAM) module in a shared disk enclosure to make the MRT accessible to all nodes in the system. In one embodiment, the NVRAM module comprises copies of MRTs from each node operating within the cluster system.

Description

technical field [0001] The present invention relates to redundant array of independent disks (RAID) in a client / server computing environment, and more particularly to systems and methods with reliable failover capability with respect to write operations of failed nodes in the cluster. Background technique [0002] In modern client / server computing environments, a cluster is a group of connected, independent computer systems called nodes that acts as a single system. Clients interact with the cluster as if it were a single server. The combined computing and storage capabilities of a cluster make it a useful tool in many applications, from online commerce to scientific modelling. In many instances, the reliability of these systems is critical to the overall success of a commercial endeavor or scientific experiment. [0003] The most vulnerable component of computer systems, including cluster systems, is the hard disk drive, the only substantially mechanical, moving part of t...

Claims

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Application Information

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IPC IPC(8): G06F3/06G06F9/312G06F11/07G06F11/10G06F11/20G06F12/00H04L1/22
CPCG06F11/2092G06F2003/0697G06F2201/82G06F3/0601
Inventor D·Q-Y·初A·金
Owner IBM CORP
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