Dynamic Storage Zone Boundary Adjustment for RAID Efficiency

Solution Overview

Problem

Conventional RAID configurations, such as RAID 0 and RAID 1, face limitations in fault-tolerance and storage efficiency, with RAID 0 offering no fault-tolerance and RAID 1 requiring twice the memory space, while RAID 5 and RAID 6 configurations necessitate a minimum number of drives, leading to suboptimal performance and capacity utilization in data storage systems.

Innovation Solution

A storage apparatus and method that dynamically adjusts storage zone boundaries within a disk, allowing for flexible implementation of RAID 0 and RAID 1 configurations, enabling expansion into additional zones for increased storage capacity and fault-tolerance, thereby optimizing data storage efficiency by allocating separate zones for unsecured and secured data and utilizing a third zone for dynamic boundary expansion.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If RAID 1 configuration is used to provide fault-tolerance, then reliability is improved, but storage capacity is reduced by half

Engineering Contradiction:

Improvefault-toleranceVSAvoidstorage capacity

Core Design Contradiction:

ReliabilityVSQuantity of substance

Solution Approach 1:

The storage device is divided into multiple zones with different RAID configurations. The first zone uses RAID 1 for fault-tolerant storage of critical data, while the second zone uses RAID 0 for high-capacity storage of non-critical data. This segmentation allows the system to obtain fault-tolerance where needed without sacrificing overall storage capacity.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

Different regions of the storage device are assigned different quality characteristics. The first zone implements RAID 1 with mirroring for high reliability, while the second zone implements RAID 0 with striping for maximum capacity. This local differentiation allows each zone to optimize for its specific purpose without compromising the other.

Inventive Principle:

Principle #3Local quality

2Quantity of substance

If RAID 0 configuration is used to increase storage capacity, then storage capacity is improved, but reliability deteriorates

Engineering Contradiction:

Improvestorage capacityVSAvoidfault-tolerance

Core Design Contradiction:

Quantity of substanceVSReliability

Solution Approach 1:

The storage device is divided into multiple zones with different RAID configurations. The first zone uses RAID 1 for fault-tolerant storage of critical data, while the second zone uses RAID 0 for high-capacity storage of non-critical data. This segmentation allows the system to obtain fault-tolerance where needed without sacrificing overall storage capacity.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

Different regions of the storage device are assigned different quality characteristics. The first zone implements RAID 1 with mirroring for high reliability, while the second zone implements RAID 0 with striping for maximum capacity. This local differentiation allows each zone to optimize for its specific purpose without compromising the other.

Inventive Principle:

Principle #3Local quality

3Reliability

If RAID 5 or RAID 6 configuration is used to balance fault-tolerance and capacity, then reliability is improved, but device complexity increases due to minimum drive requirements

Engineering Contradiction:

Improvefault-toleranceVSAvoidminimum drive requirements

Core Design Contradiction:

ReliabilityVSDevice complexity

Solution Approach 1:

The storage device is divided into multiple zones with different RAID configurations. The first zone uses RAID 1 for fault-tolerant storage of critical data, while the second zone uses RAID 0 for high-capacity storage of non-critical data. This segmentation allows the system to obtain fault-tolerance where needed without sacrificing overall storage capacity.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The storage device can dynamically allocate zones between different RAID configurations based on workload requirements. A single storage device can serve multiple functions - acting as both a high-reliability storage (RAID 1 zone) and a high-capacity storage (RAID 0 zone), eliminating the need for separate devices for different storage purposes.

Inventive Principle:

Principle #6Universality (Multi-functionality)

Data Source

PatentUS8639907B2Method and apparatus for dynamically adjusting memory capacity in accordance with data storage

Publication Date: 2014.01.28 NETGEAR INC

AI summary

A storage apparatus and method configured to improve efficiency of data access utilizing dynamically adjusting storage zone boundary within a disk are disclosed. A process capable of implementing the flexible zone boundary, in one example, allocates a first zone of a first disk operable to store data. While the first zone can be referred to as a Redundant Array of Independent Disks 0 (“RAID 0”) zone, the implementation of RAID 0 can be carried out in the first zone. Upon allocating a second zone of the first disk operable to store secured data, the process allocates a third zone of the first disk wherein the storage boundary of the first zone can be dynamically expanded into the third zone in response to the availability of free storage capacity of the first zone of the first disk.