Silicon Motion, Inc.

De-Wei Lai

Hsiao-Te Chang

Chang-Hao Chiang

Jen-Hung Liao

Kuo-Tung Huang

Yueh-Hsien Li

A data storage device including a flash memory and a controller. The flash memory includes a plurality of blocks, and each of the blocks has a plurality of pages. The controller receives a write command which is arranged to write a plurality of data sectors into a plurality of first pages of a first block of the blocks, calculates an offset index according to a first erase count of the first block, retrieving a plurality of seeds from a random seed table according to the offset index, encodes the data sectors by using the retrieved seeds to obtain a plurality of encoded data sectors, and writes the encoded data sectors into the first pages.

Data storage device and data maintenance method thereof

A data storage system comprises a host and a flash memory device having a non-non-volatile memory. A controller of the flash memory device calculates an average erase count of the flash memory to obtaining a remaining period of time indicating usable lifespan of the flash memory device. The host obtains an index by comparing the average erase count with a first threshold and determines a performance capability status for the flash memory device. The performance capability status is set to a first status when the average erase count exceeds the first threshold. The host generates an indication based on the performance capability status and performs a limp function responsive to the first status. The limp function loads a predetermined in-system programming code for replacing an original one to configure a minimum number of at least some spare blocks of the flash memory reserved and used for data update operations.

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Hsinchu, Taiwan

De-Wei Lai