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21. 发明申请

US20150363119A1 METHOD OF WRITING FILE ONTO TAPE 有权
标题翻译：将文件写入胶带的方法
公开(公告)号：US20150363119A1
公开(公告)日：2015-12-17
申请号：US14702191
申请日：2015-05-01
申请人： International Business Machines Corporation
发明人： Hiroshi Itagaki , Tsuyoshi Miyamura
IPC分类号： G06F3/06
CPC分类号： G06F3/0613 , G06F3/0643 , G06F3/0682 , G11B27/10
摘要： An approach to reducing overhead to enable high-speed writing even when a large number of small-sized files are written onto a tape in a file system. The method of the present invention includes the steps of: writing multiple files consecutively onto a tape to become one combined file; writing, onto the tape, first index information including the start position and size of the combined file on the tape; and writing, onto the tape, second index information including the start position and size of each of the multiple files in the combined file on the tape.
摘要翻译：即使将大量小尺寸的文件写入到文件系统中的磁带上，也是减少开销以实现高速写入的方法。本发明的方法包括以下步骤：将多个文件连续写入磁带，成为一个组合文件; 在磁带上写入包括磁带上的组合文件的开始位置和大小的第一索引信息; 并在磁带上写入包括磁带上的组合文件中的多个文件的开始位置和大小的第二索引信息。

22. 发明申请

US20150155004A1 Performing Process for Removal Medium 有权
标题翻译：去除介质的执行过程
公开(公告)号：US20150155004A1
公开(公告)日：2015-06-04
申请号：US14615106
申请日：2015-02-05
申请人： International Business Machines Corporation
发明人： Hiroshi Itagaki , Yutaka Oishi , Kazuhiro Ozeki , Katsumi Yoshimura
IPC分类号： G11B20/18
CPC分类号： G11B20/18 , G06F11/0727 , G06F11/076 , G06F11/079 , G11B20/1816 , G11B27/36 , G11B2220/90
摘要： In a controller of a tape drive, when an error recovery section cannot recover an error detected by an error detecting section, an error-report generation section generates an error report, an error-information acquisition section acquires error information of the tape drive and a cartridge loaded in the tape drive, an error-information exchange section acquires pieces of error information of other tape drives and cartridges loaded in these other tape drives, an error-factor judging section judges whether the error is attributable to the tape drive or the cartridge based on these pieces of error information, an error-report update section updates the error report in accordance with the result of this judgment, and an error-report output section outputs the error report thus updated to a host.
摘要翻译：在磁带驱动器的控制器中，当错误恢复部分不能恢复由错误检测部分检测到的错误时，错误报告生成部分生成错误报告，错误信息获取部分获取磁带驱动器的错误信息和装载在磁带驱动器中的磁带盒，错误信息交换部分获取装载在这些其他磁带驱动器中的其它磁带驱动器和磁带盒的错误信息，错误因素判断部分判断磁带驱动器或磁带盒是否归因于错误基于这些错误信息，错误报告更新部根据该判断结果来更新错误报告，并且错误报告输出部将所更新的错误报告输出到主机。

23. 发明申请

US20150154222A1 Efficiency of File Synchronization in a Linear Tape File System 有权
标题翻译：线性磁带文件系统中文件同步的效率
公开(公告)号：US20150154222A1
公开(公告)日：2015-06-04
申请号：US14096094
申请日：2013-12-04
申请人： International Business Machines Corporation
发明人： Takashi Ashida , Tohru Hasegawa , Hiroshi Itagaki , Shinsuke Mitsuma , Terue Watanabe
IPC分类号： G06F17/30 , H04L29/08
CPC分类号： G06F17/30174 , G06F17/30091 , G06F17/30371
摘要： A mechanism is provided for improved file synchronization of a magnetic tape. A destination device determines whether one or more file checksums exist in an extended file attribute associated with an identified file. Responsive to one or more file checksums existing in the extended file attribute associated with the identified file, the destination device reads the one or more file checksums out of the extended file attribute without accessing the magnetic tape. The destination device transmits the one or more file checksums to a source device. The source device segments the data of the new file into fixed-length blocks that do not overlap one another. The source device calculates one or more new file checksums for each of the fixed-length blocks. The source device transmits the one or more new file checksums to the destination device.
摘要翻译：提供了用于改进磁带的文件同步的机制。目标设备确定与识别的文件相关联的扩展文件属性中是否存在一个或多个文件校验和。响应于与识别的文件相关联的扩展文件属性中存在的一个或多个文件校验和，目标设备从扩展文件属性中读取一个或多个文件校验和，而不访问磁带。目标设备将一个或多个文件校验和发送到源设备。源设备将新文件的数据分段为不重叠的固定长度块。源设备为每个固定长度块计算一个或多个新文件校验和。源设备将一个或多个新的文件校验和发送到目的地设备。

24. 发明申请

US20150062733A1 Method for Reading File Using Plurality of Tape Media 有权
标题翻译：使用多种磁带介质读取文件的方法
公开(公告)号：US20150062733A1
公开(公告)日：2015-03-05
申请号：US14473303
申请日：2014-08-29
申请人： International Business Machines Corporation
发明人： Takashi Ashida , Hiroshi Itagaki , Setsuko Masuda , Tsuyoshi Miyamura , Terue Watanabe
IPC分类号： G06F3/06 , G11B5/008
CPC分类号： G06F3/0611 , G06F3/0613 , G06F3/0643 , G06F3/0656 , G06F3/0686 , G06F12/0866 , G06F2003/0691 , G06F2003/0698 , G06F2212/1024 , G06F2212/213 , G11B5/00813 , G11B27/002 , G11B27/11 , G11B2220/90
摘要： A storage system includes a plurality of tape drives connected, to a host, and a buffer configured to temporarily hold data read from the drives. A mechanism loads a plurality of media on which a file has been written to the plurality of drives so as to mount the plurality of media in the plurality of drives and divides the file into a plurality of data portions in an order. The mechanism determines a medium that takes the shortest time to move from a current position of a read head of a corresponding drive to a beginning position of the file and one or more media from which following data portions of the beginning data portion are to be read. The mechanism executes reading of the following data portions from the next media and temporarily holding of the read following data portions in the buffer of the storage system while reading the beginning data portion of the file from the first medium to the host.
摘要翻译：存储系统包括连接到主机的多个磁带驱动器和被配置为临时保持从驱动器读取的数据的缓冲器。一种机构将已经写入文件的多个介质加载到多个驱动器，以便将多个介质安装在多个驱动器中，并将该文件按顺序划分成多个数据部分。该机构确定一个介质，其花费最短的时间从相应的驱动器的读取头的当前位置移动到该文件的开始位置，以及一个或多个介质，从该数据部分开始读取数据部分的后续数据部分。在从第一媒体向主机读取文件的起始数据部分的同时，机构执行从下一个媒体读取以下数据部分并临时保存读取的存储系统的缓冲器中的后续数据部分。

25. 发明申请

US20230097031A1 APPENDING DATA TO A TAPE CARTRIDGE DURING RECALL OPERATIONS 有权
公开(公告)号：US20230097031A1
公开(公告)日：2023-03-30
申请号：US17486970
申请日：2021-09-28
申请人： International Business Machines Corporation
发明人： Noriko Yamamoto , Hiroshi Itagaki , Tsuyoshi Miyamura , Tohru Hasegawa , Shinsuke Mitsuma , Atsushi Abe
IPC分类号： G06F3/06
摘要： A tool for tape library hierarchical storage management. The tool mounts a tape cartridge to a tape drive to satisfy a recall request. The tool determines there is available tape capacity on the tape cartridge to migrate data from a migration queue during recall operations. The tool sends a locate end of data (EOD) command to the tape drive. The tool receives a longitudinal position (LPOS) range returned from the tape drive. The tool determines the migration queue is within the LPOS range. The tool writes data from the migration queue to the tape cartridge within the LPOS range.

26. 发明授权

US11487457B2 Reclassification of files in a hierarchical storage management system 有权
公开(公告)号：US11487457B2
公开(公告)日：2022-11-01
申请号：US17199488
申请日：2021-03-12
申请人： International Business Machines Corporation
发明人： Tohru Hasegawa , Hiroshi Itagaki , Tsuyoshi Miyamura , Shinsuke Mitsuma , Atsushi Abe , Noriko Yamamoto
IPC分类号： G06F3/06 , G06F16/16 , G06F16/185
摘要： In an approach to automatically reclassifying files in an HSM system, responsive to occurrence of a recall to move a file on a hierarchical storage system from a secondary storage to a primary storage, whether stub metadata exists for the file is determined. Responsive to determining that stub metadata exists for the file, whether reclassification of the file is necessary is determined based on the stub metadata. Responsive to determining that the reclassification of the file is necessary, the file is reclassified, where the reclassification uses a latest classification model, and further where the stub metadata is updated with results of the reclassification. The file is migrated from the primary storage to the secondary storage based on the stub metadata.

27. 发明授权

US11437062B1 Reducing time to reposition tape to write index 有权
公开(公告)号：US11437062B1
公开(公告)日：2022-09-06
申请号：US17409075
申请日：2021-08-23
申请人： International Business Machines Corporation
发明人： Tsuyoshi Miyamura , Tohru Hasegawa , Noriko Yamamoto , Atsushi Abe , Hiroshi Itagaki , Shinsuke Mitsuma
IPC分类号： G11B27/10 , G11B5/55 , G11B5/02 , G11B5/008 , G11B5/49
摘要： Aspects of the present disclosure relate to a method for reducing repositioning time within tape systems. A request to reposition to a target file within a tape medium can be received. A determination can be made that a previous command issued to the tape system was a write and that an index corresponding to the write has not been written. In response to determining that the previous command was the write and that the index corresponding to the write has not been written, a first file mark, the index after the first file mark, and a second file mark after the index can be written.

28. 发明授权

US11204891B2 Identifying partial update for tape file system 有权
公开(公告)号：US11204891B2
公开(公告)日：2021-12-21
申请号：US15343313
申请日：2016-11-04
申请人： International Business Machines Corporation
发明人： Atsushi Abe , Tohru Hasegawa , Hiroshi Itagaki
IPC分类号： G06F16/10 , G06F16/11 , G06F3/06 , G06F16/18
摘要： A request to open a file from a plurality of files in a storage is received from an application. The storage is made up of an index partition, containing recordings of file system indexes, and a data partition, containing recordings of the indexes and the file system data body. A file descriptor is created with an update flag that references the file. A determination is made that the file is being updated by the application, and the update flag is set to a value representing that the file is being updated. A request to write an index of the file system is received. A determination is made whether a specific file from the plurality of files is being updated. The index is written to the storage with an extended attribute for the specific file indicating that the specific file was being updated at the time the index was written.

29. 发明授权

US11175843B2 Data storage system with generation rollback control 有权
公开(公告)号：US11175843B2
公开(公告)日：2021-11-16
申请号：US16197475
申请日：2018-11-21
申请人： International Business Machines Corporation
发明人： Tsuyoshi Miyamura , Tohru Hasegawa , Hiroshi Itagaki , Noriko Yamamoto , Shinsuke Mitsuma
IPC分类号： G06F16/00 , G06F3/06 , G06F16/901
摘要： A linear tape file system (LTFS) maintains a series of indexes, and an incremental change dataset, that records incremental changes that have taken place in each new index over the previous one, as each new index of the series is created. Upon receiving a command to roll back the file system from a current generation to a target previous generation, a generation control module applies information in the incremental change dataset to the current index. In this way, the current index is restored, at least functionally, to the state it was in when the target generation was created, thereby effectuating the rollback of the file system to the target generation.

30. 发明申请

US20210149590A1 READING SEQUENTIALLY STORED FILES BASED ON READ AHEAD GROUPS 有权
公开(公告)号：US20210149590A1
公开(公告)日：2021-05-20
申请号：US16689127
申请日：2019-11-20
申请人： INTERNATIONAL BUSINESS MACHINES CORPORATION
发明人： Tsuyoshi Miyamura , Hiroshi Itagaki , Shinsuke Mitsuma , Tohru Hasegawa , Noriko Yamamoto , Sosuke Matsui
IPC分类号： G06F3/06
摘要： A plurality of files are stored on magnetic tape having at least one wrap for storing data sets. Each data set includes one or more records. A number of data sets that will remain in a buffer memory after performing a read ahead operation is determined. A number of records that are likely to remain in the buffer memory after performing a read ahead operation is determined. For each record likely to remain in the buffer memory after performing a read ahead operation, positions of the records on the magnetic tape are determined. Each file of the plurality of files are classified into one group of a plurality of groups based on a position of a record corresponding with each respective file and the number of records that are likely to remain in the buffer memory after performing a read ahead operation.

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