Method and device used for RAID (Redundant Array of Independent Disks)

An independent disk redundancy and disk technology, which is applied in the field of storage systems to save reconstruction time and achieve flexible reconstruction.

Active Publication Date: 2017-04-05
EMC IP HLDG CO LLC
View PDF8 Cites 11 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In view of the above-mentioned problems in the prior art, the purpose of the embodiments of the present disclosure is to provide a method and device for redundant array of independent disks RAID, so as to solve the above-mentioned and other problems in the prior art

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Method and device used for RAID (Redundant Array of Independent Disks)
  • Method and device used for RAID (Redundant Array of Independent Disks)
  • Method and device used for RAID (Redundant Array of Independent Disks)

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0041] The principle and spirit of the present disclosure will be described below with reference to several exemplary embodiments shown in the accompanying drawings. It should be understood that these specific embodiments are described only to enable those skilled in the art to better understand and realize the present disclosure, rather than to limit the scope of the present disclosure in any way.

[0042] figure 1 The layout of data and metadata of an example RAID is schematically shown. Such as figure 1 As shown in , in products such as EMC's VNX2, users can create a redundant array of independent disks RAID on multiple disks. The disk space of the RAID can be divided into chunks, and the size of each chunk can be 1 megabyte. Further, RAID can define metadata to describe block status, such as information requiring reconstruction, and can store the metadata in an area at the end of each disk. The data zone and metadata zone can use the same RAID geometry and algorithm. ...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

No PUM Login to view more

Abstract

The content of the invention provides a method and a device used for a RAID (Redundant Array of Independent Disks). The method comprises the following steps of: dividing the RAID into a plurality of sub-RAIDs; generating sub-RAID metadata corresponding to each sub-RAID; and responding when one disk in the RAID is replaced, and reconstructing data in the corresponding sub-RAID on the basis of each piece of sub-RAID metadata. The content of the invention also provides a computer-readable storage medium and a storage system.

Description

technical field [0001] The present disclosure relates generally to a storage system and method, and more particularly to a method and apparatus for redundant array of independent disks (RAID). Background technique [0002] Among disks that can constitute a redundant array of independent disks RAID, several kinds of disks have inferior performance but have large capacities, such as NL-SAS disks. As a result, when a RAID including NL-SAS disks is degraded, the reconstruction for new disks will take a long time, even days. In this situation, the RAID stays in a dangerous state (potential data unavailability / data loss) for an excessively long period of time, because any failure of any other disk from this RAID will result in corruption of the entire RAID (if the RAID is a RAID- 5 types). All data from this RAID will be unavailable. In summary, when the RAID is in a degraded state, customers will frequently encounter the risk of data unavailability. [0003] However, the RAID...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
Patent Type & Authority Applications(China)
IPC IPC(8): G06F3/06
CPCG06F11/1092G06F11/2094G06F11/1076G06F11/2056G06F11/2053G06F11/1662G06F2201/805G06F2201/82
Inventor 高宏坡高健肖会兵董继炳韩耕
Owner EMC IP HLDG CO LLC
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap