Data read-in method, disc redundant array and controller thereof

A technology for writing data and controllers, applied in the field of communications, can solve the problems of low disk space utilization, disk cannot be re-allocated, etc., to achieve the effect of improving space utilization

Active Publication Date: 2010-01-13
CHENGDU HUAWEI TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The existing RAID technology is based on the entire disk. Even if a RAID group only uses a small amount o...

Method used

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  • Data read-in method, disc redundant array and controller thereof
  • Data read-in method, disc redundant array and controller thereof
  • Data read-in method, disc redundant array and controller thereof

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Embodiment Construction

[0025] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0026] Such as figure 1 As shown, it is a schematic flowchart of the first embodiment of the method for writing data in the present invention, which may include the following steps:

[0027] Step 11, receiving a write request message, the write request message includes the data to be written and the address of the logical block to which the data to be written is to be written;

[0028] Step 12, look up the logical disk unit corresponding to the logical block ...

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Abstract

The embodiment of the invention relates to a data read-in method, a disc redundant array and a controller thereof, wherein the data read-in method comprises the following steps: receiving a read-in request message comprising data to be read in and a logical block address to be read in by the data; looking up a logical disc unit corresponding to the logical block address and an idle physical disc unit corresponding to the logical disc unit in a set logical independent disc redundant array RAID according to a mapping table; and reading the data to be read in into the idle physical disc unit. The embodiment of the invention can effectively improve the utilization rate of the disc.

Description

technical field [0001] The invention relates to communication technology, in particular to a method for writing data, a controller of a redundant array of disks and a redundant array of disks. Background technique [0002] How to increase the access speed of the disk, how to prevent data from being lost due to disk failure, and how to effectively use the disk space have always been puzzled by computer professionals and users, and the price of large-capacity disks is very expensive, causing great harm to users. burden. [0003] The emergence of disk array technology has solved these problems in one fell swoop. The advantages of a redundant array of independent disks (Redundant Array of Independent Drive, hereinafter referred to as: RAID) exist in three aspects, namely, availability (Availability), capacity (Capacity) and performance (Performance). There are three main benefits of using RAID technology in the storage system: one is to provide disk spanning function by organi...

Claims

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Application Information

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IPC IPC(8): G06F3/06
Inventor 林宇张巍
Owner CHENGDU HUAWEI TECH
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