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Disk array system configuring a logical disk drive having a redundancy function

A disk array and logic disk technology, which is applied in instruments, recording signal processing, electrical digital data processing, etc., can solve the problem of high cost of the disk array system, and achieve the effect of improving reliability

Inactive Publication Date: 2006-07-26
NEC CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In short, there is a problem that a spare disk with a higher write data rate to achieve high-speed redundancy restoration in a disk array leads to a larger cost of the disk array system

Method used

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  • Disk array system configuring a logical disk drive having a redundancy function
  • Disk array system configuring a logical disk drive having a redundancy function
  • Disk array system configuring a logical disk drive having a redundancy function

Examples

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Embodiment Construction

[0019] The invention will now be described in more detail with reference to the accompanying drawings, in which like reference numerals indicate like components throughout.

[0020] FIG. 1 shows a block diagram of a disk array system according to a first embodiment of the present invention. The number 100 is usually used to indicate a disk array system, which includes: multiple (16) physical disks (first physical disk) 10 to 25, multiple (4) physical disks (second physical disk) 50 to 53, logical disk control 30 and spare disk controller 40. The first logical disks 10 to 25 are used as master disks in the disk array system 100 . The second logical disks 50 to 53 are used as spare disks. Compared to the first logical disks 10 to 25, the second logical disks 50 to 53 have a lower read / write data rate and are thus cheaper.

[0021] Sixteen first logical disks 10 to 25 configure four logical disks 101 to 104 . More specifically, the logical disk controller 30 makes the physica...

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PUM

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Abstract

A disk array system includes a plurality of physical disks ( 10 to 25 ) configuring a logical disk ( 101 to 104 ) having a redundancy function, and a plurality of spare disks ( 50 to 53 ) for storing recovered data recovered from the physical disks ( 10 to 25 ) by the redundancy function upon occurring of a failure of one of the logical disks ( 10 to 25 ). A spare disk controller ( 40 ) writes the recovered data into the spare disks ( 50 to 53 ) in parallel for a high-speed redundancy recovery.

Description

technical field [0001] The present invention relates to a disk array system configured with logical disk drives having a redundant function, and more particularly, to a disk array system including a plurality of physical disk drives serving as a single logical disk drive having a redundant function. The invention also relates to a method used in such a disk array system. Background technique [0002] In the prior art, a disk array system including a plurality of physical disk drives serving as a single logical disk drive is known. Hereinafter, a disk drive including one or more disks is simply referred to as a "disk" herein. In a disk array system, data is usually stored according to a redundancy technology for realizing no loss of data. Examples of such disk array systems include RAID (Redundant Array of Independent Disks) systems. In a RAID system with a redundant configuration, if one of the physical disks in the disk array system fails and therefore data cannot be rea...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F3/06
CPCG06F11/1092G11B20/1803
Inventor 佐藤宏之
Owner NEC CORP
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