Block management method, controller and storage system for flash memory

Block management method, controller and storage system for flash memory

  • CN 102,043,724 A
  • Filed: 10/15/2009
  • Published: 05/04/2011
  • Est. Priority Date: 10/15/2009
  • Status: Active Application
First Claim
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1. block management method, a plurality of physical blocks that are used to manage a flash memory wafer, described block management method comprises:

  • Dispose a plurality of logical addresses;

    Described a plurality of logical addresses are mapped to a plurality of logical blocks, and described a plurality of logical blocks are mapped to described a plurality of physical blocks;

    Dispose one logical blocks-physical blocks mapping table to write down the mapping relations between described a plurality of logical blocks and the described a plurality of physical blocks;

    From a host computer system, obtain at least one deletion record, wherein said at least one deletion record comprises about a plurality of information of having deleted logical address among described a plurality of logical addresses, and it is deleted in described host computer system to be stored in described a plurality of data of having deleted in the logical address;

    Obtain one among described a plurality of logical blocks according to described at least one deletion record and deleted logical blocks, the data that wherein are stored in corresponding described described a plurality of logical addresses of having deleted logical blocks are deleted in described host computer system;

    AndBe denoted as a bad logical address with mapping to described each described a plurality of logical address of having deleted logical blocks, wherein said host computer system can'"'"'t the described bad logical address of access.

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