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Method of writing a file to a plurality of media and a storage system thereof

A storage system and medium technology, applied in the direction of information storage, record information storage, input/output to record carrier, etc., can solve problems such as non-existence, and achieve the effect of improving reading performance

Active Publication Date: 2014-06-18
IBM CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Currently, no mechanism exists in LTFS for enabling spanning

Method used

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  • Method of writing a file to a plurality of media and a storage system thereof
  • Method of writing a file to a plurality of media and a storage system thereof
  • Method of writing a file to a plurality of media and a storage system thereof

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Embodiment Construction

[0065] In the following, implementations of the invention will be described with reference to the case where data of a file portion of a file is written to, read from, or edited in a storage system (comprising a plurality of tape drives) way (example).

[0066] The present invention assumes that multiple drives are used to write data volumes to multiple media that exceed the capacity of the media. The write method includes the following steps:

[0067] (1) Once loaded into the drive, the first media (parent media) remains resident in the drive until the file is completely written.

[0068] (2) Perform writing to the remaining one or more media (one or more sub-mediums) using another drive or two or more other drives.

[0069] (3) In the first medium, the information on the medium containing the pieces (file parts) of the divided file is collectively managed.

[0070] (4) ID information on the parent medium is stored in the child medium.

[0071] figure 1 Displays storage ...

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PUM

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Abstract

The invention relates to a method for writing a file to a plurality of media and a storage system thereof. The method includes loading a parent medium into a first drive to retrieve ID information about the parent medium from metadata, writing a first file part to the parent medium and, at about a same time, saving a file name, attribute information, and attribute information about the first file part to the parent medium as metadata, loading a child medium into a second drive in order to write subsequent file parts and retrieving ID information about the child medium from metadata, writing the subsequent file parts to the child medium and, at about a same time, saving the ID information and attribute information about the subsequent file parts to the parent medium, and additionally saving the ID information about the child medium and the attribute information about the subsequent file parts as metadata in the child medium.

Description

technical field [0001] The invention relates to a method and a storage system for writing files to multiple media. More particularly, the present invention relates to a method of writing portions of a file to a plurality of tape media in a storage system comprising at least two tape drives. Background technique [0002] The data storage capacity of a storage system including a tape drive depends on the maximum capacity of the tape media as an upper limit. For example, fifth generation Linear Tape Open (LTO) tape drives cannot write amounts of data exceeding 1.5 "TB", which is the maximum capacity of the media. Also, in the case of writing additional data to a medium on which a certain amount of data has already been written, the amount of data to be additionally written must be smaller than the maximum capacity of the medium. [0003] Tape drives can be used in file systems, like HDDs etc. For example, the Linear Tape File System (LTFS) is an example of a file system for ...

Claims

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Application Information

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IPC IPC(8): G06F3/06G06F17/30
CPCG06F3/0686G06F3/0643G06F3/0619G11B27/002G11B27/031G11B27/30
Inventor 宫村刚志板垣浩渡边辉江长谷川徹
Owner IBM CORP
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