Self-detection method and device for disk bad block

Abstract

It is described a bad disk block self-detection method, including: each mounted chunk is partitioned into n sub-chunks, all sub-chunks having a same size, where n is an integer not less than 2; checking information is set at a fixed location of each sub-chunk, data is stored onto locations of each sub-chunk other than the fixed location, where the checking information is parity checking information for the data; and when the data is read or written, data verification is performed based on the checking information set at the fixed location of the read sub-chunk. It is also described a bad disk block self-detection apparatus and a computer storage medium. With the described above, the bad block on the disk can be detected rapidly, and it is able to instruct data migration and disk replacement.

Description

technical field [0001] The invention relates to data storage technology, in particular to a method and device for self-detection of disk bad blocks Background technique [0002] Hard disk data is stored in blocks as logical units on the magnetic medium of the hard disk. Corresponding sectors cannot be read or written or data errors on the block will result in bad blocks, making the data unusable. In order to ensure the availability of data, the storage system needs to have the ability to detect bad blocks on the disk, so as to avoid reading and writing bad blocks and migrate important data in time. The usual practice is to store certain redundant information according to the data, and judge whether a bad block is generated by the redundant information in the next read and write operation. Typical methods include ECC and RAID5 / 6. [0003] ECC is a Forward Error Correction Coding (FEC, Forward Error Correction) method, which was originally used for error detection and error c...

Images