Method for processing data errors, and device and system for checking and correcting data errors

Abstract

The embodiment of the invention discloses a method for processing data errors, and a device and a system for checking and correcting the data errors. The method for processing the data errors comprises the following steps of: acquiring a bit number with errors in a data block; judging whether the bit number with errors is greater than or equal to the preset threshold value which is smaller than a maximum bit position number corrected by the device for checking and correcting the data errors; and identifying a physical block which stores the data block as a bad block if the bit number with errors is grater than or equal to the preset threshold value. Because the physical block which stores the data block is identified as the bad block if the bit number with errors is judged to be greater than or equal to the preset threshold value which is smaller than the maximum bit position number corrected by the device for checking and correcting the data errors, the method for processing the data errors, and the device and the system for checking and correcting the data errors of the embodiment of the invention can effectively avoid the appearance of the errors which cannot be corrected so as to avoid the loss of the user data and prevent modifying the user data by mistake.

Description

technical field [0001] The invention relates to the field of storage technology, in particular to a data error processing method, a data error checking and correcting device and system. Background technique [0002] Error Checking and Correcting (ECC) is an algorithm that can judge and correct data errors, and the number of data error bits that it can correct is fixed. When the number of erroneous bits in the data block exceeds the number of bits that can be corrected by the ECC module, the ECC cannot correct the data error, which will cause the loss of user data block data, which cannot be recovered. [0003] In the prior art, when the ECC module checks out data bit errors, if the number of erroneous bits is less than the maximum number of bits that can be corrected by the ECC module, the ECC module automatically repairs the corresponding erroneous bits; if the number of erroneous bits is greater than the ECC If the module can correct the maximum number of bits, the physic...

AI Technical Summary

Problems solved by technology

[0005] When an ECC check error occurs, the number of erroneous bits has exceeded the maximum number of bits that can be corrected by the ECC module. Usually, the data of this data block is irrecoverable, resulting in the loss of user data.

Moreover, when the number of erroneous bits exceeds the maximum number of bits that can be corrected by the ECC module, false negatives may occur. When false negatives occur, not only cannot correct errors, but the correct data may also be corrected

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