Built-in mapping message of memory device

Abstract

A storage module and a method for operating the memory module to build the mapping message into the block of a memory unit to which the mapping message belongs are disclosed. Specifically, when writing into a page according to a logic data block, the page comprises the snapshot of the current mapping message of the logic data block; with the method, the final effective physical page of the logic data block contains physical / logic mapping of the block. Thus, each effective page of the memory device is substituted and scanned for reconstructing the mapping message, and the memory module can only scan the final effective physical page of each logic data block. Once the final effective physical page of the logic data block is found, the latest mapping message of the logic data block can be read from the page.

Description

technical field [0001] The present disclosure relates generally to semiconductor memory, and in particular, in one or more embodiments, the present disclosure relates to methods and apparatus of utilizing embedded mapping information of a memory device. Background technique [0002] Electronic devices typically have some type of mass storage available to them. A common example is a hard disk drive (HDD). HDDs are capable of providing large amounts of storage at relatively low cost, with current consumer HDDs offering capacities in excess of 1 terabyte. [0003] HDDs typically store data on rotating magnetic media or backplanes. Data is usually stored on the backplane as a flux reversal pattern. To write data to a typical HDD, the backplane spins at high speed while a write head floating above the backplane generates a series of magnetic pulses to align the magnetic particles on the backplane to represent the data. To read data from a typical HDD, a resistance change is i...

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