SMR Storage Layout With Separate Metadata Recording Region
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Solution Overview
Problem
Current data storage in storage devices, particularly shingled magnetic recording (SMR) disks, results in data redundancy and low storage efficiency due to the need to store both data and associated storage information within the same region, leading to wasted space.
Innovation Solution
The storage device is divided into a recording region for storing data and an SMR region for storing data, with the recording region storing storage information such as configuration and metadata, allowing efficient data storage by separating data and storage information.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If data and storage information are stored in the same region, then data can be stored, but storage space is wasted and storage efficiency is low
Solution Approach 1:
The storage device is divided into two distinct regions: an SMR region for storing data and a recording region for storing storage information. This segmentation separates data and metadata storage functions, allowing the SMR region to be fully utilized for data storage without wasting space on metadata, thereby improving storage efficiency while maintaining total storage capacity
Solution Approach 2:
Storage information (metadata) is extracted from the data storage region and placed in a separate recording region. This extraction eliminates the waste of storage space that would occur if metadata were stored within the SMR region, allowing the SMR region to dedicate 100% of its capacity to data storage while the recording region handles metadata operations
2Quantity of substance
If SMR region stores both data and storage information, then all information can be stored, but data redundancy occurs
Solution Approach 1:
By segmenting the storage device into SMR and recording regions with distinct functions, data is stored only in the SMR region while storage information is stored only in the recording region. This eliminates data redundancy by ensuring that data and its metadata are not duplicated within the same region, reducing wasted storage space
3Productivity
If storage information is stored separately in recording region, then storage efficiency improves, but device complexity increases
Solution Approach 1:
The segmentation into SMR and recording regions, while adding structural complexity, is offset by the simplification of storage operations. Each region has a dedicated function (data storage vs. metadata storage), which simplifies the management logic compared to handling both data and metadata in a single region. The segmentation enables more efficient storage operations that compensate for the increased structural complexity
Data Source
AI summary
Systems and methods for data storage in a storage device are provided in the present disclosure. The method may include dividing the storage device into a recording region and a shingled magnetic recording (SMR) region. The SMR region may be configured to store data, and the recording region may be configured to store storage information associated with the storage device. The storage information may include at least a corresponding relationship between an index of the data and a storage location of the data. The method may also include obtaining target data to be stored. The method may further include determining, based on the target data and the storage information, a target position in the SMR region for storing the target data.