摘要:
Methods and apparatus for efficiently tracking the usage of physical blocks of non-volatile memory are disclosed. According to one aspect of the present invention, a method for maintaining a data structure that stores contents relating to the usage of physical blocks includes determining when to update the contents stored in the data structure, and obtaining a first differential erase count from the data structure when the contents are to be updated. The first differential erase count provides information on a number of times a first physical block has been erased. The method also includes determining a first actual erase count when the contents are to be updated. The first actual erase count is associated with a second physical block, and provides a number of times the second physical block has been erased. Finally, the method includes updating the first differential erase count when the contents are to be updated.
摘要:
Methods and apparatus for using different error correction code algorithms to encode and to decode contents of blocks within a non-volatile memory are disclosed. According to one aspect of the present invention, a method for storing data within a non-volatile memory includes identifying a first block into which the data is to be stored, and obtaining an indicator associated with the first block. A determination may then be made regarding whether the indicator indicates that the data is to be encoded using a first algorithm. The data is encoded using the first algorithm when it is determined that the data is to be encoded using the first algorithm, after which point the data encoded using the first algorithm is written into the first block.
摘要:
Methods and apparatus for allowing tables to be adaptively backed up are disclosed. According to one aspect of the present invention, a method for operating a memory system with a non-volatile memory that includes a reserved memory area, a plurality of physical blocks and a plurality of data structures including an erase count block involves determining when contents associated with at least one data structure of the plurality of data structures are to be substantially backed up. A request to substantially back up the contents associated with the at least one data structure is executed when it is determined that the contents associated with the at least one data structure are to be substantially backed up. Executing the request allows contents associated with the at least one data structure are substantially backed up in the reserved memory area.
摘要:
A secure software package for original equipment manufacturers to run in electronic devices in order to access and dynamically decrypt encrypted audio video or other content from a memory storage device such as a memory card, optical or hard disk such that the user interface of the device need only send simple commands and the decrypted content is output.
摘要:
A method for re-allocating memory partition space is provided. The method comprises determining when a first memory partition is full or has reached a threshold value, determining that a second memory partition has unused storage space that can be allocated to the first memory partition, and assigning the unused storage space from the second memory partition to the first memory partition. A memory controller embedded within the mass storage device and having an interface to an external host assigns the unused storage space from the second memory partition to the first memory partition.
摘要:
Methods and apparatus for dynamically configuring a redundant area of a physical page are disclosed. According to one aspect of the present invention, a method for dynamically configuring a redundant area of a page associated with a physical block of a non-volatile memory of a memory system includes determining when at least one byte associated with the redundant area is to be altered. The byte includes error correction code (ECC) information associated with a first ECC algorithm at the time of the determination. The method also includes altering the byte when it is determined that the byte is to be altered. Altering the byte includes altering the byte to include ECC information associated with a second ECC algorithm.
摘要:
Methods and apparatus for enabling contents to be efficiently stored in physical blocks of a non-volatile memory are disclosed. According to one aspect of the present invention, a method for performing a write operation in a non-volatile memory system which has a memory unit includes writing a first set of contents into a first physical sub-unit of the memory unit and writing a second set of contents into a second physical sub-unit of the memory unit after the first set of contents is written into the first physical sub-unit. The first physical sub-unit is sequentially before the second physical sub-unit in the memory unit. The first set of contents is associated with a second logical sub-unit of a logical unit and the second set of contents is associated with a first logical sub-unit of the logical unit that is sequentially before the second logical sub-unit in the logical unit.
摘要:
Methods and apparatus for determining which of a plurality of physical blocks associated with a logical block is more recently associated with the logical block are disclosed. According to one aspect of the present invention, a method for resolving associations of a first physical block and a second physical block to a logical block associated with a non-volatile memory system includes obtaining a first identifier associated with the first physical block and obtaining a second identifier associated with the second physical block. The identifiers are compared to ascertain whether the first identifier indicates that the first physical block is more recently associated with the logical block. The method also includes completing an operation arranged to provide contents associated with the logical block to the first physical block when it is determined that the first identifier indicates that the first physical block is more newly associated with the logical block.
摘要:
A secure software system for a portable device or computer that provides a simple interface to the device or computer and that retrieves and dynamically decrypts keys and content from a secure media while minimizing exposure of the keys and eliminating the need for manufacturers of the device or computer to create a their own system to manage these complex processes.
摘要:
Methods and apparatus for enabling a power up process of a non-volatile memory to occur efficiently are disclosed. According to one aspect of the present invention, a method for utilizing a memory system that has a non-volatile memory with at least one reserved memory area includes providing power to the memory system, initializing the non-volatile memory, and writing a first signature into the reserved memory area. The first signature is arranged to indicate that the memory system was successfully initialized. In one embodiment, the method also includes executing a power down process on the memory system, and writing a second signature into the reserved memory area which indicates that the power down process has been executed.