Abstract: In one general embodiment, a computer-implemented method includes receiving, by the computer, a request to access a first magnetic recording tape. A determination is made, by the computer, whether the first magnetic recording tape is currently loaded in a tape drive. In response to determining that the first magnetic recording tape is not currently loaded in a tape drive, a determination is made, by the computer, of an amount of time to unmount and unload a magnetic recording tape from each of at least two tape drives each having a magnetic recording tape loaded therein. The tape drive with the shortest amount of time to unmount and unload the magnetic recording tape loaded therein is selected and instructed to unload the magnetic recording tape loaded therein. The first magnetic recording tape is caused to be loaded into the selected tape drive.

Abstract: Aspects of the present disclosure relate to synchronizing data writes. An update to a file stored on a virtual tape image is received. A position and length of the file is recorded as an invalid data area. The virtual tape image is then synchronized with a tape. The invalid data area is then released from the virtual tape image.

Abstract: Electrochromic device including: first electrode; a first auxiliary electrode; a second electrode; a second auxiliary electrode having average distance of 100 mm or less with the first auxiliary electrode; an electrochromic layer; a solid electrolyte layer; and controlling unit configured to control to apply voltage according to a driving pattern that is at least one selected from the group consisting of a first driving pattern, a second driving pattern, and an initialization driving pattern, wherein the first driving pattern is a driving pattern configured to turn the electrochromic layer into first coloring state, the second driving pattern is a driving pattern configured to turn the first coloring state into a second coloring state that has coloring density lower than coloring density of the first coloring state, and the initialization driving pattern is driving pattern for forming an initial decolored state.

Abstract: An electronic device includes electrode layers and supports. The electrode layers and supports include an electrode layer and a support on each of both sides of an electronic functional layer in a thickness direction. Taking-out electrode parts from the electrode layers are exposed in a plane region of at least one of the supports on the both sides.

Abstract: A system, computer program product, and method are provided to selectively index one or more subsets of documents or files. As data is extracted from a document or file, extracted text is organized into data portions and subject to evaluations. Meta characteristic data is leveraged to assess the extracted text. One or more subsets of the organized data portions are selectively identified and subject to enrichment processing, which creates and returns enriched and indexed subsets of the documents or files.

Abstract: A computer-implemented method, according to one approach, includes: receiving a request to read a plurality of files from a magnetic tape, and obtaining a tape directory which identifies regions on the magnetic tape in which the files are stored. The tape directory is used to map each of the files to one of the regions on the magnetic tape in which the respective file is stored. A first subset of the files stored in a same first region on the magnetic tape is also sorted into a first order. The computer-implemented method further includes simultaneously: sorting a second subset of the files stored in a same second region on the magnetic tape into a second order, and instructing a tape drive to read each of the files in the first subset according to the first order.

Abstract: The method, computer program product, and computer system may include a computing device which may generate a list of data to be copied from a plurality of source media to a target medium. The computing device may identify a first type of data in the generated list of data with the first type of data being pre-migrated data. The computing device may reclaim the first type of data from a primary storage tier to the target medium with the target medium being associated with the first drive. The computing device may identify a second type of data in the generated list of data, the second type of data being migrated data, and reclaim the second type of data from at least one secondary source medium to the target medium using the first drive and a second drive. The secondary source medium may be associated with the second drive.

Abstract: Aspects of the present disclosure relate to a method for timing index write to a tape medium of a tape system. Index write timing data that specifies index write timing based on file metadata attributes is stored. Metadata attributes of a first file are analyzed to determine whether a first index should be written at a first time based on the index write timing data. In response to determining that an index should be written, the first index is written to the tape medium at the first time.

Abstract: A system and method for transferring data stored in a first storage having a deduplication function to a second storage are presented. Deduplication information may be provided for a common data section of first data, stored in the first storage, containing a unique data section and the common data section. The unique section and the deduplication information for the common data section of the first data using a deduplication index may be sent from the first storage to a second storage. The first data may be copied in the second storage based on the deduplication information.

Abstract: A method for allocating non-conflicting inode numbers between files generated at a first location and files generated at another location is provided. The method includes providing an inode number allocation rule table indicating availability for assignment a plurality of inode number allocation rules associated with the first location and the another location, generating a fileset at the first location by assigning an available inode number allocation rule to the fileset, registering, in the inode number allocation rule table, information associated with the fileset, and generating a file at the first location by determining the fileset within which to generate the file; and allocating an inode number for the file based on the available inode number allocation rule assigned to the fileset.

Abstract: A computer-implemented method, according to one embodiment, includes: sending one or more instructions to calculate a combined size of fragments included in the fragmented files, sending one or more instructions to designate a portion of cache which corresponds to at least the combined size of the fragments, sending one or more instructions to send a copy of each non-fragmented file from a first drive directly to a second drive in which the second sequential storage medium is loaded, sending one or more instructions to use the designated portion of the cache to accumulate the fragments included in the fragmented files, and sending one or more instructions to send a copy of each of the fragments corresponding to a given fragmented file from the cache to the second drive in response to determining that all of the fragments corresponding to the given fragmented file have been accumulated in the cache.

Abstract: The time required for recalling the file is reduced when the file is written in a mounted plurality of tapes in comparison to recalling the file when written in a non-mounted plurality of tapes. In the non-mounted state, criteria does not typically exist in order to recall the written file within the plurality of tapes. Embodiments of the present invention provide systems and methods for recalling files based on criteria which considers: the mounted state of a tape; the type of tape; the type of available tape drive; the number of files included in a tape; and the location of the written file in a tape.

Abstract: 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.

Abstract: An information providing system and method, including a computer, for providing time taken to read a file, which includes an acquisition unit. The acquisition unit obtains information on a recording position of a file when the file is recorded in a storage device. A recording unit writes information on the obtained recording position to an index referred to access the file. A calculation unit calculates time taken to read the file using the information on the recording position written to the index in response to a request to obtain the time taken to read the file, and providing the calculated time to a requester that requests the time.

Abstract: A method includes setting a maximum total size of data saved in a snapshot area, creating a snapshot of a file system, including reference to a plurality of logical volumes, saving at least a part of the plurality of logical volumes in the snapshot area on condition that it does not exceed the maximum total size of data saved in the snapshot area, and executing copy-on-write processing in response to a writing request for data in the file system, the data not being saved in the snapshot area.

Abstract: A computer program product, according to one embodiment, includes a computer readable storage medium having program instructions embodied therewith. The program instructions are readable and/or executable by a processor to cause the processor to: receive a first portion of data, and divide the first portion of data into a plurality of blocks. An identification segment having identification information therein is appended to each of the blocks, each block and the corresponding identification information appended thereto forming a record. Each record is written in a data partition of the magnetic tape, and an index may be written in the data partition of the magnetic tape. The magnetic tape is rewound to a beginning of tape in response to a final one of the records being written in the magnetic tape, and the index is written in an index partition of the magnetic tape.

Abstract: A method to identify data elements conforming to a policy includes receiving a request to identify data elements in an input set of data elements that conform to one or more requested policies. According to the method, policy output information describing data elements that conform to a requested policy are saved in association with the requested policy. In response to receiving a subsequent request to identify data elements in a subsequent set of data elements that conform to the requested policy, the method includes outputting the saved policy output information based on the policy output information having been saved in association with the requested policy. A computer program product and a system, configured with processors and a memory that can store saved policy information, can implement the method.

Abstract: Software for reclaiming a storage medium. The software determines that a first storage medium storing data in a linear tape file system (LTFS) format meets a predetermined condition indicating that the first storage medium should be reclaimed. Responsive to reading requested data from the first storage medium, and responsive to determining that the first storage medium meets the predetermined condition, the software writes the requested data to a second storage medium in the LTFS format. Subsequent to writing the requested data to the second storage medium, the software reconciles the first storage medium to delete expired data. Subsequent to reconciling the first storage medium, the software explicitly reclaims remaining data on the first storage medium to the second storage medium in the LTFS format.

Abstract: The direction of a WRAP and the logical points on which a file are written influence the efficiency of a recall of the file. Embodiments of the present invention provide methods and systems which can be applied to an upper storage layer and a lower storage layer in a hierarchical storage system. In turn, the migration and recall of a plurality of files, which contain data, are more rapid and efficient by preferring one logical point over another logical point.

Abstract: A method, computer system, and a computer program product for verifying data written to a tape is provided. The present invention may include preparing a first group of data to be written to the tape; signaling a tape drive to perform a write operation to write the first group of data to the tape; receiving from the tape drive a tape head location signal, wherein the tape head location signal indicates that the tape drive has detected that the tape movement during the write operation has reached a turnaround point; performing a read operation to read the first group of data from the tape; receiving from the tape drive a second group of data read by the tape drive during the read operation; and comparing the first group of data to the second group of data.