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A data reading and data technology, applied in the storage field, can solve problems such as poor re-reading effect and no good options
Inactive Publication Date: 2019-07-12
NEW H3C TECH CO LTD
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[0006] However, there are many ways to adjust the read voltage. For example, to adjust the read voltage to read voltage A or read voltage B, then, whether to adjust the read voltage to read voltage A or to adjust the read voltage to read voltage B, currently There are no good options, resulting in poor re-reading effects
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[0027] The terms used in the embodiments of the present application are only for the purpose of describing specific embodiments, rather than limiting the present application. As used in this application and the claims, the singular forms "a", "the" and "the" are intended to include the plural forms as well, unless the context clearly dictates otherwise. It should also be understood that the term "and / or" as used herein is meant to include any and all possible combinations of one or more of the associated listed items.
[0028] It should be understood that although the embodiments of the present application may use terms such as first, second, and third to describe various information, such information should not be limited to these terms. These terms are only used to distinguish information of the same type from one another. For example, without departing from the scope of the present application, first information may also be called second information, and similarly, second ...
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Abstract
The invention provides a data reading method and device, and the method comprises the steps: receiving a data reading instruction which comprises an identifier of a target physical block; obtaining aread voltage identification table corresponding to the identification of the target physical block from a preset cache space; wherein the reading voltage identification table comprises a plurality ofreading voltage identifications arranged according to a reading sequence; based on the reading sequence of the plurality of reading voltage identifiers, selecting one reading voltage identifier from the plurality of reading voltage identifiers, and determining a reading voltage parameter corresponding to the reading voltage identifier; reading data from the target physical block by using the voltage reading parameter; if the data reading fails, returning to execute a process of selecting one reading voltage identifier from the plurality of reading voltage identifiers based on a reading sequence of the plurality of reading voltage identifiers; and if the data is successfully read, outputting the successfully read data. According to the technical scheme, the reading efficiency can be improved, the reading performance is improved, and the reading speed is increased.
Description
technical field [0001] The present application relates to the field of storage technology, in particular to a data reading method and device. Background technique [0002] SSD (Solid State Drives, solid state drive) is a new type of hard disk with fast speed, high anti-seismic safety, good stability, high integration, large capacity, fast read and write speed, small read and write delay, low power consumption, Non-volatile storage media and other characteristics are widely used in various fields of life, such as consumer electronics, military equipment, monitoring and security, networks, servers, handheld devices, industrial control, etc. [0003] During the use of solid-state hard drives, data can be continuously written to physical blocks (that is, Blocks, also known as data blocks) until the physical block is full, and then data is written to the next physical block, and so on. . During the use of solid-state hard drives, in order to ensure that there are available phys...
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