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Reading method of bad sector data of hard disk

A hard disk and bad track technology, which is applied in the field of reading bad track data of the hard disk, can solve the problem that the data of the logical bad track of the mechanical hard disk cannot be read, etc.

Inactive Publication Date: 2016-07-27
XLY SALVATIONDATA TECHNOLOGY INC
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Problems solved by technology

[0006] Aiming at the deficiencies of the prior art, the present invention provides a method for reading bad track data of a hard disk. This method mainly solves the situation that the data of logical bad track of a mechanical hard disk cannot be read

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  • Reading method of bad sector data of hard disk

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Embodiment Construction

[0017] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be described in further detail below with reference to the accompanying drawings and examples.

[0018] A method for reading bad track data on a hard disk. When the upper interface sends a data request to the physical hard disk, the firmware program will receive the LBA value requested by the upper layer. According to the LBA value, the firmware program will actively judge whether the location can request access. DMA mode and PIO mode request access, if access is not possible or the access causes the hard disk to freeze (this happens to most hard disks with bad sectors), the firmware program will actively control the hard disk to restart and try to read.

[0019] The details are as follows: S1 loads the hard disk; S2 initializes and loads the hard disk status information; S3 sends a data read request to the hard disk; S4 requests to access the locat...

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Abstract

The invention discloses a reading method of bad sector data of a hard disk, and belongs to the field of data recovery. The method comprises following steps of S1, loading the hard disk; S2, initializing; loading hard disk state information; S3, sending a data reading request to the hard disk; S4, requesting to access the position of an LBA (Logical Block Address) value; S5, reading a hard disk state bitmap file; and S6, returning data or reading data according to whether the LBA position requested to access is a recorded bad sector or not. The method has the advantages that an upper layer interface sends the data request to the physical hard disk, a firmware program will receive the LBA value of the upper layer request, the firmware program will actively judge whether the position can be requested to access or not according to the LBA value; the access is requested in a DMA mode or a PIO mode; when the access cannot be carried out or the access results in the hang phenomenon of the hard disk, the firmware program will actively control the hard disk to restart attempted reading; and the condition that the data of the logic bad sector of the mechanical hard disk cannot be read can be solved successfully based on the method provided by the invention.

Description

technical field [0001] The invention relates to the field of data recovery, in particular to a method for reading bad track data of a hard disk. Background technique [0002] With the advent of the "big data" era, abstract things like "data" have become more and more concrete in our lives. From energy, economy, communication, to personal privacy and company files, many important data information will be stored in the storage medium. As the data storage medium of PC, hard disk is widely used in various fields, and mechanical hard disk has an irreplaceable market share due to its capacity and cost advantages. [0003] Hard disk bad sectors are divided into logical bad sectors and physical bad sectors. The reasons for logical bad sectors of hard disks are usually due to improper use or operation of software, abnormal shutdown, dust, vibration, static electricity and high temperature. During daily use, bad sectors due to various reasons may cause data to be unable to be read n...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F3/06
CPCG06F3/0614G06F3/0676
Inventor 梁效宁董超张佳强
Owner XLY SALVATIONDATA TECHNOLOGY INC
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