Method and device for writing in and reading out data and virtual tape library device

A technology of data writing and data reading, which is applied in the direction of input/output to record carrier, redundancy in operation, data error detection, generation of response error, etc., which can solve the problems of increasing networking costs and high backup costs , to reduce backup costs, simplify networking, and reduce costs
CN101751231AInactive Publication Date: 2010-06-23HUAWEI DIGITAL TECH (CHENGDU) CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
HUAWEI DIGITAL TECH (CHENGDU) CO LTD
Publication Date
2010-06-23
Estimated Expiration
Not applicable · inactive patent

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Abstract

An embodiment of the invention relates to a method and a device for writing in and reading out data and a virtual tape library device. The method for writing in data comprises the following steps of: when writing data in a disc, writing tape configuration information corresponding to the data in the disc, wherein the tape configuration information is generated in the process of the virtual tape on the disc; and recording a disc identifier of the disc. In the embodiment of the invention, the disc in the VTL can preserve the backup data under an off-line state by writing the data and tape configuration information for backup in the disc and by recording the disc ID. The embodiment of the invention requires no physical tape library as the filing medium, thereby ensuring simple networking and reducing the backup cost.
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Description

technical field

[0001] The invention relates to the field of data storage, in particular to a data writing and reading method and device, and virtual tape library equipment. Background technique

[0002] With the popularization of informatization and the explosive growth of data, more and more users are beginning to realize the importance of data protection. There are mainly two types of data backup methods in the prior art: one is the backup method of data from disk to physical tape library (Disk to Tape library, D2T for short), and the other is the backup method of data from disk to virtual tape library. (Virtual Tape Library, referred to as: VTL), and then archive the data from the VTL to the physical tape library (Disk to VTL to Tape library, referred to as: D2V2T) backup method.

[0003] In the D2T backup method, because the backup window of the physical tape library is relatively short, it cannot meet the needs of enterprise users for massive data backup.

[0004] Th...

Claims

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