Backup method for key data in hybrid SSD
A key data, hybrid technology, applied in the redundant operation of data error detection, data processing input/output process, electrical digital data processing and other directions, can solve the problem of reducing data backup overhead, delay and increase in write amplification and other problems, to achieve the effect of improving reliability, low write amplification, and good performance
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[0025] Take SLC-TLC hybrid SSD as an example, refer to figure 1 , is the flow chart of the read operation of the present embodiment invention, starting from step 101, and then:
[0026] In step 102, when a read request arrives, the SSD will split a large read request into multiple small read sub-requests for processing respectively.
[0027] In step 103, the SSD controller checks the backup tag delivered with the request to determine whether the requested data is backed up. If the requested data is not backed up, then execute step 104, process the read sub-request according to the traditional read processing flow of the hybrid SSD, and then proceed to step 109 to end; if the requested data has a backup, then execute step 105, read the data from the SLC, Then go to step 106 .
[0028] In step 106, it is determined whether a read error occurs when the SLC reads data. If read error occurs, then execute step 107, read data from TLC, execute step 108 then, carry out data recover...
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