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Information system and i/o processing method

A technology of information system and processing method, applied in the direction of electronic digital data processing, error detection/correction, input/output to record carrier, etc., can solve problems such as inability to be universal, and achieve the effect of improving usability

Active Publication Date: 2012-07-04
HITACHI LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in this case, special replacement path software for replacement is required in the host, and cannot be used universally

Method used

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  • Information system and i/o processing method
  • Information system and i/o processing method
  • Information system and i/o processing method

Examples

Experimental program
Comparison scheme
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no. 1 approach

[0021]

[0022] figure 1 It is a figure which shows an example of the hardware structure of the information system 100 which concerns on one Embodiment of this invention.

[0023] The information system 100 includes, for example, a storage device 1500 , a host computer (hereinafter simply referred to as a host) 1100 , a management host 1200 , and two or more virtual storage devices 1000 . The number of the storage device 1500, the host 1100, and the management host 1200 may be one or more. The virtualized storage device 1000 and the host 1100 are connected to each other via an I / O network 1300 . The virtualized storage device 1000 , the storage device 1500 , and the management host 1200 are connected to each other via a management network (not shown) or an I / O network 1300 .

[0024] A host internal network 1104 exists in the host 1100, and a processor (abbreviated as Proc in the figure) 1101, a memory (abbreviated as Mem in the figure) 1102, and an I / O port (abbreviated a...

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Abstract

The invention relates to information system and I / O processing method. The invention provides an information system capable of improving the availability. First and second storage apparatuses respectively and internally set a remote copy pair for copying data of a first volume to a second volume and associate a third volume with a remote copy pair according to an external command. When an I / O request to the first volume ends in an error, a host computer sends an I / O request directed to the second volume to the second storage apparatus. If the first and the second storage apparatuses detect a failure in the first or the second storage apparatus of the other side or a connection failure between the first and the second storage apparatuses, the first and the second storage apparatuses store in the third volume a failure information flag showing that the failure was detected.

Description

technical field [0001] The present invention relates to information systems having multiple storage systems. Background technique [0002] Generally, in an information system, there is a storage device using, for example, a HDD (Hard Disk Drive) as a storage device, and a storage system including this storage device is accessed from a plurality of high-level devices (such as hosts) via a storage area network (SAN: Storage Area Network). . In general, a storage device adopts a high-reliability method conforming to the RAID (Redundant Array of Independent (or Inexpensive) Disks) technology to provide a storage device with reliability exceeding that of a single HDD. However, with the progress of the information society in recent years, the information system that utilizes the above-mentioned RAID to contribute to reliability has a problem in terms of availability (continuity of service). [0003] As a high-availability technology to cope with this situation, there is a techno...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06F11/07G06F3/06
CPCG06F11/2069G06F11/2076G06F11/1666
Inventor 二濑健太
Owner HITACHI LTD
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