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Hard disk scanning detection method

A technology of scanning detection and scanning method, which is applied in the field of hard disk scanning detection, can solve problems such as insufficient scanning range, failure of RAID5 array, waste of scanning resources, etc., and achieve the effects of avoiding incomplete scanning range, reducing CPU burden, and reducing use cost

Pending Publication Date: 2021-01-01
TIANJIN JINHANG COMP TECH RES INST
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Problems solved by technology

The problem with the random scanning method is that the scanning range is not comprehensive enough, and it is easy to miss bad sectors. For example, on a storage array RAID5 that does not support double disk failure, when a hard disk fails, if the If bad sectors appear on another data disk, the RAID5 array will fail
Another disadvantage is that due to random scanning, there is no regularity in scanning, which will cause some sectors of the hard disk to be read multiple times in one scan cycle, while some sectors may be read in multiple scan cycles. have not been scanned, which causes a waste of scanning resources and poses a serious challenge to the reliability of the entire storage array

Method used

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Embodiment Construction

[0019] In order to make the purpose, content, and advantages of the present invention clearer, the specific implementation manners of the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments.

[0020] The basic idea of ​​the block scanning detection method is the same as that of other hard disk erasing technologies. By sending the command to read data to the hard disk, find the bad sectors of the hard disk that cannot read data, and use the ECC mechanism to recover the bad sectors. Status mark, and then remap the data on the sector, and restore the data to a good sector.

[0021] Such as image 3 As shown, the strategy of the block scanning method is: first divide the hard disk into N sections (Sections) of the same size, and the addresses between the sections are continuous. Then divide the data in each area into M data blocks (Blocks) of uniform size, and the addresses between the data blocks are also cont...

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Abstract

The invention discloses a hard disk scanning detection method, and the method comprises the following steps: issuing a data reading command to a hard disk, finding a hard disk bad track of which datacannot be read, performing state marking on a bad track sector by using an ECC mechanism, performing Remap processing on the data on the sector, and recovering the data to a good sector. According tothe invention, the defect of incomplete scanning range of a random scanning method is avoided, and each sector of the hard disk can be scanned; the defect that a full-disk scanning method is not flexible enough is overcome, and hard disk bad tracks can be found more quickly; the CPU burden can be reduced, and the use cost of a user is reduced.

Description

technical field [0001] The invention belongs to the technical field of data storage, and relates to a hard disk scanning detection method for improving the reliability of data storage. Background technique [0002] The continuous growth of digital information and the continuous improvement of technical means in modern society, the continuous increase of data storage scale and hard disk capacity, make it possible for a hard disk among the thousands of hard disks in the data center to fail at any time, so it is very important for the reliability of the storage array. Sex poses a challenge. [0003] Error prevention before an error occurs refers to a behavior in which the storage system checks the reliability of the software and hardware of the storage system to prevent system errors. This approach is very effective for discovering and repairing potential sector failures or silent data corruption in storage systems. Because these two types of errors are not very harmful to th...

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Application Information

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IPC IPC(8): G11C29/32G11C29/42
CPCG11C29/32G11C29/42
Inventor 周津何全付彦淇刘超仇旭东
Owner TIANJIN JINHANG COMP TECH RES INST
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