Method and device for reading RAID1 (Redundant Array of Inexpensive Disk 1) equipment

A technology for reading devices and equipment, which is used in instruments, electrical digital data processing, input/output to record carriers, etc., to achieve the effect of shortening response time and improving reading performance

Inactive Publication Date: 2011-06-01
INVENTEC CORP
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  • Abstract
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  • Application Information

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Problems solved by technology

[0004] In the existing RAID1 technology, some methods are fixed to read a disk, and some methods mainly consider the current I/O pos

Method used

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  • Method and device for reading RAID1 (Redundant Array of Inexpensive Disk 1) equipment
  • Method and device for reading RAID1 (Redundant Array of Inexpensive Disk 1) equipment
  • Method and device for reading RAID1 (Redundant Array of Inexpensive Disk 1) equipment

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Example Embodiment

[0022] The following describes in detail the embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein the same or similar reference numerals refer to the same or similar components or components having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, but not to be construed as a limitation of the present invention.

[0023] First refer to figure 2 , which shows a schematic structural diagram of a reading device of a RAID1 device according to an embodiment of the present invention. like figure 2 As shown, for a RAID1 device 10 composed of a plurality of member disks, member disk 1, member disk 2, . . . Block dividing module 26 and read request processing module 28 . The information statistics module 22 collects statistics on the current status information of each member disk 1-n included ...

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Abstract

The invention discloses a method and device for reading RAID1 (Redundant Array of Inexpensive Disk 1) equipment. The device comprises an information counting module, a reading block dividing module and a reading request processing module, wherein the information counting module is used for counting current state information of various member disks contained in the RAID1 equipment when a reading request of data of the RAID1 equipment is received; the reading block dividing module is used for dividing the size of reading blocks of the member disks according to the size of the data required to be read; and the reading request processing module is used for distributing the reading request onto the member disks to execute parallel data reading according to the current state information of all the member disks and the size of the reading blocks and informing idle member disks to read data of a next block into a cache in advance. The invention improves the reading efficiency of the RAID1 equipment.

Description

technical field [0001] The present invention relates to a disk array technology, in particular to a method and device for reading a RAID1 device. Background technique [0002] RAID1 disk arrays are generally implemented by mirroring technology. Many companies use RAID1 to achieve non-disruptive backup jobs to protect critical data. When using RAID1, data written to a redundant array of disks (RAID, redundant arrays of inexpensive disks) devices will be written to each member disk and written to the same location. In this way, disk damage in the disk array will not affect the normal operation of the array, and even if only one disk is left in the array, the read and write requests on the RAID device can be handled normally. [0003] RAID1 is usually used in occasions that need to provide high data redundancy protection and do not require high read and write performance. When writing data to a RAID device, the data is written to each member disk, which prolongs the write re...

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Application Information

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IPC IPC(8): G06F3/06G06F12/08G06F12/0866
Inventor 姚海挺陈玄同
Owner INVENTEC CORP
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