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Flash memory including flash translation layer and method of storing files therein

A technology of memory and conversion layer, applied in memory systems, instruments, memory architecture access/allocation, etc., can solve the problem of high price

Inactive Publication Date: 2014-10-29
THOMSON LICENSING SA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] At least today, flash-based memory has the disadvantage of high price per gigabyte compared to other storage media like optical discs

Method used

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  • Flash memory including flash translation layer and method of storing files therein
  • Flash memory including flash translation layer and method of storing files therein

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Experimental program
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Embodiment Construction

[0025] In storage management, the logical storage management can be separated from the physical attributes of the underlying storage structures by means of the interface layer. This allows the same logical storage management system to be used regardless of the physicality of the storage device. For example, flash memory like SD or MMC has a controller that implements a flash translation layer that converts between the external world and the memory's internal representation.

[0026] The controller handles special flash memory attributes such as erasable blocks, deleted blocks, written blocks, etc. The controller provides access to these specific memory behaviors, i.e., erases deleted blocks before writing to them, and implements wear leveling by avoiding reusing the same memory blocks too frequently, to account for the limited number of times a flash memory block can write cycle.

[0027] Since most physical storage devices are sector-based, common logical file management sy...

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Abstract

A Flash based memory (PH_MEM) comprising a Flash translation layer (FTL) is described. The Flash translation layer (FTL) comprises first translation information associating a first logical address of a logical file system (LG_MEM) with a first physical address of said flash based memory (PH_MEM). The logical file system (LG_MEM) emulates a sectored storage medium and the logical address is a logical sector start address. The logical file system (LG_MEM) comprises a number of logical stuffing bits (LSB) expanding a logical size of data of a file (PSF) stored in said Flash based memory (PH_MEM) such that the expanded logical size corresponds to an integer number of logical sectors (L_SEC) and the Flash translation layer (FTL) comprises second translation information associating a second logical address with a second physical address, the second translation information depending on said number of logical stuffing bits (LSB).

Description

technical field [0001] The present invention relates to a Flash based memory comprising a Flash translation layer and a method for storing files therein. Background technique [0002] Flash-based memory offers a significant advantage over other storage media like hard disks and other optical media like DVD or BD: Flash memory requires no moving parts to be accessed and thus cannot be damaged by moving parts The operation becomes inaccessible. This makes flash memory a very suitable storage device for mobile applications where harsh conditions may occur. [0003] One of these applications is capturing still images or images of video frames. Flash-based memory is used as storage in end-user devices like digital still cameras and digital video cameras. Flash-based memories are also found in MP3-players. Further, as a storage device, flash-based memory is becoming more and more important for professional digital cinema cameras. [0004] Typically, flash memory has internal ...

Claims

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Application Information

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IPC IPC(8): G06F3/06G06F12/02
CPCG06F3/0679G06F3/0608G06F3/0643G06F12/0246G06F2212/1044G06F2212/7201
Inventor 马科.温特
Owner THOMSON LICENSING SA