Hard Disk Drive Write-Only Region Data Integrity

Resolve Bottlenecks,
Find Innovative SolutionsGenerate Solutions

Solution Overview

Problem

Current hard disk drives lack a reliable method to ensure data integrity and security, particularly in preventing unauthorized tampering with stored data, which is critical for backup, antivirus, and audit trail protection.

Innovation Solution

A controller for a hard disk drive or USB device is implemented with a write-only region that designates specific blocks as 'no access' unless a predetermined security code is input, preventing further writes or reads without authorization, and allows conventional read/write operations in another region.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If data is stored in a conventional read/write region, then data can be read and overwritten, but data integrity and security cannot be ensured against unauthorized tampering

Engineering Contradiction:

Improvedata integrityVSAvoiddata access flexibility

Core Design Contradiction:

ReliabilityVSEase of operation

Solution Approach 1:

The storage medium is divided into distinct regions: a write-only region for secure data storage and a conventional read/write region for flexible data access. This segmentation allows data to be stored in a protected zone where once written, it cannot be read or overwritten without authorization, thus ensuring data integrity while maintaining operational flexibility in other regions

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

Different regions of the storage medium are assigned different access characteristics. The write-only region has restricted access properties (write once, no read/overwrite without authorization) while the read/write region maintains standard access flexibility. This local differentiation of quality allows simultaneous achievement of data security and operational ease in appropriate contexts

Inventive Principle:

Principle #3Local quality

2Reliability

If a write-only region is implemented to prevent unauthorized modification, then data security is improved, but device complexity increases

Engineering Contradiction:

Improvedata securityVSAvoidcontroller logic

Core Design Contradiction:

ReliabilityVSDevice complexity

Solution Approach 1:

The controller is pre-configured with logic to identify write-only regions and enforce access restrictions before any write operations occur. The system proactively prevents unauthorized writes by checking whether a target location is in a write-only region and whether proper authorization exists, rather than reacting to security violations after they occur

Inventive Principle:

Principle #10Preliminary action

Solution Approach 2:

The controller acts as an intermediary between the user and the storage medium, interceptting write commands and determining whether they should be permitted based on the target location and authorization status. This intermediary layer enforces security policies without requiring changes to the underlying storage medium or user applications

Inventive Principle:

Principle #24Intermediary (Mediator)

Data Source

PatentUS8140795B2Hard disk drive with write-only region

Publication Date: 2012.03.20 LENOVO SWITZERLAND INTERNATIONAL GMBH

AI summary

The invention partitions the HDD into three areas, namely, no access, write-only, and the conventional read/write. Sensitive data (antivirus programs, back up data, etc.) is written into write-only areas, which thereafter become designated “no access” by appropriately changing their designation a data structure known as “logical block address” or “LBA”. Only users having approved passwords can change the status of a “no access” block back to “write-only” or “read/write”.