Disk Device System Data Recording Across Multiple Surfaces
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Solution Overview
Problem
Existing disk devices require impractically large amounts of time to record system data for protection against data loss or deterioration, necessitating a method to record system data more efficiently.
Innovation Solution
A disk device configuration that divides system data into equal-sized portions and records them across multiple recording surfaces, using parity data and strategically timing the switching between recording surfaces to minimize the time required for data recording and retrieval.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If system data is recorded with duplication for protection, then data reliability is improved, but recording time becomes impractically large
Solution Approach 1:
The system data is divided into multiple portions (first portion, second portion, third portion) and recorded in different system regions on different recording surfaces. This segmentation allows parallel recording operations across multiple surfaces, significantly reducing the total recording time while maintaining data duplication for protection.
Solution Approach 2:
The patent transitions from sequential recording on a single surface to parallel recording across multiple recording surfaces. By utilizing the temporal and spatial dimensions simultaneously, the system records multiple data portions in parallel, reducing recording time from impractically large to acceptable levels.
2Loss of time
If system data is divided and recorded on multiple surfaces, then recording time is reduced, but device complexity increases
Solution Approach 1:
The controller pre-divides the system data into multiple portions and determines the recording locations on different surfaces before initiating the recording process. This preliminary organization simplifies the control complexity by establishing a clear recording plan in advance, making the parallel recording operation more manageable.
Solution Approach 2:
The controller automatically manages the division of data and coordination of recording operations on multiple surfaces without requiring external intervention. The system self-organizes the recording process, reducing the operational complexity burden on users while achieving fast recording times.
Data Source
AI summary
A disk device includes a recording medium having a plurality of recording surfaces, where each of the recording surfaces includes a system region for recording system data related to an operation of the disk device, and a controller configured to control recording of the system data in the system region. The controller is further configured to divide the system data to be recorded into a plurality of portions of divided data of the same size. The controller is further configured, after recording of a first portion of divided data in a first system region disposed on a first recording surface, to start recording a second portion of divided data in a second system region disposed on a second recording surface. The recording of the second portion of divided data is started after a switching time, during which switching from the first recording surface to the second recording surface transpires.