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Virtual physical erase of a memory of a data storage device

A data storage device, a technology of physical erasing, applied in the field of memory

Active Publication Date: 2020-11-17
WESTERN DIGITAL TECH INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, by using a "logical erase", the data in the memory portion is still physically present in the memory and thus potentially accessible
Physical erasure of memory (e.g., flash memory) has been limited to erasing entire blocks of memory, although in some cases it is possible to physically erase memory

Method used

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  • Virtual physical erase of a memory of a data storage device
  • Virtual physical erase of a memory of a data storage device
  • Virtual physical erase of a memory of a data storage device

Examples

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Embodiment Construction

[0015] Certain aspects set forth in the specification are described below with reference to the accompanying drawings. In the description, common features are indicated by common reference numerals. Although certain examples are described herein with reference to data storage devices, it should be understood that the techniques described herein may be applied to other implementations. Additionally, it should be understood that certain ordinal terms (eg, "first" or "second") may be provided for ease of reference and do not necessarily imply physical characteristics or order. Accordingly, as used herein, ordinal words (eg, "first," "second," "third," etc.) used to modify an element such as structure, component, operation, etc., do not necessarily indicate the relative importance of the element relative to another element. priority or order, but merely to distinguish the element from another element having the same name (but using a different ordinal number). As used herein, "e...

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PUM

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Abstract

Virtual physical erase of a memory of a data storage device. One example data storage device may include a flash memory. The data storage device further may include an electronic processor that may beconfigured to store a first portion of data in the flash memory, and receive a physical erase request from an access device. The electronic processor may be further configured to identify a first block of the flash memory and a memory fragment of the first block where the first portion of data is stored in the flash memory. The electronic processor may be further configured to, in response to receiving the physical erase request, program one or more cells corresponding to the memory fragment to an increased voltage state so as to obfuscate the first portion of data that are stored in the flash memory.

Description

technical field [0001] The present application relates generally to securely erasing the memory of a data storage device. Background technique [0002] Memory, such as flash memory, can be accessed by many applications, some of which store highly sensitive data and others that do not. Therefore, the memory can provide "safe write" and "safe read" interfaces for applications to ensure the security of the data stored in the memory. Similarly, some applications that access memory may require higher security for data deleted from memory. Conventional methods of erasing memory include "logical erasing," in which the Flash Transition Layer (FTL) mapping of the portion of memory to be erased is removed from a control table, thereby avoiding any access to that portion of memory. However, by using "logical erase", the data in the memory portion is still physically present in the memory, and therefore has the potential to be accessed. Physical erasure of memory (eg, flash memory) h...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F3/06
CPCG06F3/0604G06F3/0625G06F3/0652G06F3/0679G06F2212/7201G06F2212/7205G06F12/0246Y02D10/00G06F3/061G06F3/0616G06F12/10
Inventor R.穆西亚
Owner WESTERN DIGITAL TECH INC
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