Method of writing a file to a plurality of media and a storage system thereof
US-9830102-B2 · Nov 28, 2017 · US
Deleting files written on tape
US9984078B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-9984078-B2 |
| Application number | US-201715681652-A |
| Country | US |
| Kind code | B2 |
| Filing date | Aug 21, 2017 |
| Priority date | Nov 4, 2014 |
| Publication date | May 29, 2018 |
| Grant date | May 29, 2018 |
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- Title
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Abstract
Official abstract text for this publication.
A method for writing a file from an application of a host onto a tape includes sequentially receiving records forming the file from the application, adding a predetermined number of segments of dummy data (dummy records) subsequently to the plurality of records forming the file such that the records of the file and records of a subsequent file are not included in the same data set, interposing the dummy records between a final record of the file and a head record of the subsequent (next) file, to thereby construct at least one data set that is adjacent to one data set and does not include the records of the file, and writing a data set including the records of the file, a data set (dummy data set) including the final record of the file and the dummy records, and a data set including the subsequent file, onto the tape.
First claim
Opening claim text (preview).
What is claimed is: 1. A method for writing, by a tape apparatus, a file from an application of a host onto a tape, the method comprising: sequentially receiving a plurality of records forming the file from the application; adding a predetermined number of segments of dummy data (dummy records) subsequently to the plurality of records forming the file such that the records of the file and records of a subsequent file are not included in the same data set; interposing the dummy records between a final record of the file and a head record of the subsequent file to construct at least one data set that is adjacent to one data set and does not include the records of the file; and writing a data set including the records of the file, a data set including the final record of the file and the dummy records, and a data set including the subsequent file, onto the tape; wherein adding the predetermined number of segments of dummy data includes receiving the dummy data as the predetermined number of dummy records from the application, wherein the tape apparatus is a linear tape file system (LTFS), wherein the maximum length of the records of the file is 1 MB, and a file size larger than 1 MB is divided into a plurality of records, wherein the file being in a first data set and the subsequent file being in a second data set, wherein the predetermined number of segments of dummy records are added such that the first data set remains even after deletion of the file, wherein the predetermined number of segments of dummy records are added such that the files is physically overwritten using a high frequency pattern, wherein records within a particular data set are interleaved using an interleaving function: further comprising: dividing the file.
Assignees
Inventors
Classifications
- G11B5/024Primary
Erasing · CPC title
- G06F16/116Primary
Details of conversion of file system types or formats · CPC title
magnetic tapes · CPC title
- G06F17/30076Primary
Physics · mapped topic
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Frequently asked questions
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- What does patent US9984078B2 cover?
- A method for writing a file from an application of a host onto a tape includes sequentially receiving records forming the file from the application, adding a predetermined number of segments of dummy data (dummy records) subsequently to the plurality of records forming the file such that the records of the file and records of a subsequent file are not included in the same data set, interposing …
- Who is the assignee on this patent?
- IBM
- What technology area does this patent fall under?
- Primary CPC classification G11B5/024. Mapped technology areas include Physics.
- When was this patent published?
- Publication date Tue May 29 2018 00:00:00 GMT+0000 (Coordinated Universal Time) (B2). Legal status and post-grant events are not shown on this page.
- What related patents are in patentsdb?
- We list 9 related publications on this page (citations in our corpus or others sharing the same primary CPC).