Tape Storage Migration via Metadata Copying
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Solution Overview
Problem
The replacement of storage devices using tape media is costly and time-consuming due to the need to read and write data from one tape medium to another during migration, leading to increased costs and prolonged migration times.
Innovation Solution
A storage system that generates dummy data corresponding to the data to be migrated, allowing the management information to be transmitted and stored without actually reading or writing the data, thereby reducing the need for data transfer and cartridge reuse.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If data is read from one tape medium and written to another during migration, then data can be transferred between storage devices, but migration time and costs increase
Solution Approach 1:
The patent creates a copy of the management information (metadata) that describes the data on tape cartridges, rather than physically copying the actual data. The management information includes file names, paths, and other organizational data. This allows the destination storage device to reconstruct the data structure without reading or writing the actual data content, dramatically reducing migration time while maintaining data transfer completeness.
Solution Approach 2:
The patent separates the management information from the actual data content. By migrating only the management information segment (metadata) and leaving the data segment on the original tape cartridges, the system achieves rapid migration of organizational structure while the physical data remains unchanged, reducing overall migration time.
2Reliability
If data is read from one tape medium and written to another during migration, then data can be transferred between storage devices, but costs increase
Solution Approach 1:
The patent copies only the management information rather than the actual data, significantly reducing the volume of data that needs to be read and written. This reduces wear on tape drives and consumables while maintaining the ability to transfer data references, thereby reducing migration costs.
Solution Approach 2:
The patent enables reuse of the original tape cartridges by preserving the data on them while only migrating the management information. The original tapes can be recovered and reused, eliminating the need to purchase new tape media and reducing overall migration costs.
3Reliability
If seek operations are performed during data migration, then data can be accessed and transferred, but migration time increases
Solution Approach 1:
The patent copies management information that contains references to data locations without performing seek operations on the actual data. The management information can be transferred electronically without physical tape movement, eliminating seek time while maintaining data accessibility through the copied references.
Data Source
AI summary
A storage system includes a first storage device that includes a first memory and a first processor coupled to the first memory; and a second storage device that includes a second memory and a second processor coupled to the second memory, wherein the first processor is configured to: when migrating data in object units, generate dummy data that corresponds to the data instead of the data in object units, and transmit management information used to manage an object and the dummy data to the second storage device, and the second processor is configured to: store the management information in a storage unit in association with the object, and discard the dummy data.