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公开(公告)号：US20240153535A1
公开(公告)日：2024-05-09
申请号：US18281144
申请日：2022-02-28
发明人： Minoru YAMAGA
CPC分类号： G11B20/1202 , G11B5/00817
摘要： A servo pattern recording method includes: determining a first servo band group that includes three or more servo bands for recording a servo pattern in which first servo band identification information having a plurality of bits is to be embedded, and a second servo band group that includes three or more servo bands for recording a servo pattern in which second servo band identification information having a plurality of bits is to be embedded, the second servo band identification information being different from the first servo band identification information; and recording the first and second servo band identification information on the first and second servo band groups, respectively, such that a combination of a first pair and a second pair is not duplicated, the first pair being a pair of servo band identification information and a phase in one servo band read by a first servo read head, the second pair being a pair of servo band identification information and a phase in the other servo band read by a second servo read head.
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公开(公告)号：US20240112697A1
公开(公告)日：2024-04-04
申请号：US18467426
申请日：2023-09-14
申请人： FUJIFILM Corporation
发明人： Takuto KUROKAWA , Yujin SHIBATA , Norihito KASADA , So MATSUYAMA
CPC分类号： G11B5/62 , G11B5/00817 , G11B5/588 , G11B5/84
摘要： The magnetic tape includes: a non-magnetic support; and a magnetic layer containing a ferromagnetic powder, in which an AlFeSil abrasion value measured on a surface of the magnetic layer is 20 μm or more and 50 μm or less, and standard deviation a of the AlFeSil abrasion value obtained in a width direction of the surface of the magnetic layer is 5.0 μm or less.
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公开(公告)号：US11783857B2
公开(公告)日：2023-10-10
申请号：US17115637
申请日：2020-12-08
发明人： Robert Biskeborn
IPC分类号： G11B5/56 , G11B5/584 , G11B5/29 , G11B20/20 , G11B5/48 , G11B5/008 , G11B5/265 , G11B5/53 , G11B5/55
CPC分类号： G11B5/56 , G11B5/00817 , G11B5/2652 , G11B5/29 , G11B5/4893 , G11B5/584 , G11B20/20 , G11B5/531 , G11B5/5508 , G11B5/5539
摘要： An apparatus according to one approach includes an array of skew detection transducers. An array of write transducers is spaced from the array of skew detection transducers along an intended direction of tape travel thereacross. An array of read transducers is aligned with the array of write transducers in the intended direction of tape travel. The apparatus also includes a first actuator configured to operatively exert a force on the array of skew detection transducers for orienting a longitudinal axis of the array of skew detection transducers substantially orthogonal to the actual direction of tape travel across the array of skew detection transducers. A magnetic recording medium according to one approach includes a magnetic recording tape having a longitudinal axis extending between distal ends thereof, the magnetic recording tape having vertical bars written in servo-skew patterns thereof, the vertical bars being oriented perpendicular to the longitudinal axis of the tape.
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4.发明授权公开(公告)号：US11776572B2
公开(公告)日：2023-10-03
申请号：US17455120
申请日：2021-11-16
发明人： Mark L. Watson , James N. Malina
CPC分类号： G11B5/78 , G11B5/00817
摘要： The present disclosure generally relates to a tape utilized with a tape drive including a tape head. The tape comprises a plurality of writeable portions configured to store data and a plurality of non-writeable portions that are unable to store data. The writeable portions comprise one or more materials selected from the group consisting of: Ru, Pt, Ta, and Co, and the non-writeable portions comprise a different material than the writeable portions. Each writeable portion is defined between two non-writeable portions, and each writeable portion has a greater area on the tape than each non-writeable portion. The non-writeable portions are utilized during stop-start and turn-around operations of the tape head, are configured to lubricate the tape head, clean the tape head, and remove debris from the tape head. The non-writeable portions enable improved performance of the tape drive while reducing a cost of the tape.
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公开(公告)号：US11651781B2
公开(公告)日：2023-05-16
申请号：US17598728
申请日：2019-05-09
发明人： Minoru Yamaga
CPC分类号： G11B5/00817 , G11B5/584 , G11B5/78 , G11B20/1202 , G11B21/103 , G11B2220/93
摘要： A magnetic recording medium according to the present technology is a tape-shaped magnetic recording medium including: a base material; and a magnetic layer, the tape-shaped magnetic recording medium being long in a longitudinal direction and short in a width direction, in which the magnetic layer includes a data band long in the longitudinal direction and a servo band long in the longitudinal direction, a data signal being written to the data band, a servo signal being written to the servo band, the degree of perpendicular orientation of the magnetic layer being 65% or more, a full width at half maximum of an isolated waveform in a reproduced waveform of the data signal is 185 nm or less, a thickness of the magnetic layer is 90 nm or less, and a thickness of the base material is 4.2 μm or less.
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公开(公告)号：US20180374507A1
公开(公告)日：2018-12-27
申请号：US16009603
申请日：2018-06-15
申请人： FUJIFILM Corporation
发明人： Norihito KASADA
CPC分类号： G11B5/70615 , G11B5/00813 , G11B5/00817 , G11B5/3906 , G11B5/3909 , G11B5/584 , G11B5/5926 , G11B5/70 , G11B5/70678 , G11B5/712 , G11B20/1201
摘要： The magnetic tape includes a non-magnetic support; and a magnetic layer including ferromagnetic powder and a binding agent on the non-magnetic support, in which the magnetic layer includes a timing-based servo pattern, the ferromagnetic powder is ferromagnetic hexagonal ferrite powder having an activation volume equal to or smaller than 1,600 nm3, an XRD intensity ratio Int(110)/Int(114) obtained by an X-ray diffraction analysis of the magnetic layer by using an In-Plane method is 0.5 to 4.0, a vertical direction squareness ratio of the magnetic tape is 0.65 to 1.00, and an edge shape of the timing-based servo pattern specified by magnetic force microscope observation is a shape in which a difference (L99.9−L0.1) is equal to or smaller than 180 nm, and a magnetic tape device including the magnetic tape.
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公开(公告)号：US09891834B2
公开(公告)日：2018-02-13
申请号：US15353871
申请日：2016-11-17
发明人： Tohru Hasegawa , Masayuki Iwanaga , Yutaka Oishi
CPC分类号： G06F3/0608 , G06F3/061 , G06F3/0643 , G06F3/065 , G06F3/0686 , G11B5/00817
摘要： A method includes, in a tape apparatus system, receiving a request to write a file from a host, and, in response to the request, dividing sequentially received data of the file into two or more segments. Each of the two or more segments have a predetermined size. The method further includes sequentially writing a series of the two or more segments onto one or more tapes, and determining the predetermined size based on a capacity use efficiency of a plurality of other tapes and a time to copy when a spanning file, written by spanning on the one or more tapes, is copied to the plurality of other tapes. A corresponding computer program product and computer system are also disclosed.
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公开(公告)号：US20170344271A1
公开(公告)日：2017-11-30
申请号：US15667940
申请日：2017-08-03
发明人： Tohru Hasegawa , Masayuki Iwanaga , Yutaka Oishi
CPC分类号： G06F3/0608 , G06F3/061 , G06F3/0643 , G06F3/065 , G06F3/0686 , G11B5/00817
摘要： A method includes, in a tape apparatus system, receiving a request to write a file from a host, and, in response to the request, dividing sequentially received data of the file into two or more segments. Each of the two or more segments have a predetermined size. The method further includes sequentially writing a series of the two or more segments onto one or more tapes, and determining the predetermined size based on a capacity use efficiency of a plurality of other tapes and a time to copy when a spanning file, written by spanning on the one or more tapes, is copied to the plurality of other tapes. A corresponding computer program product and computer system are also disclosed.
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公开(公告)号：US09830104B2
公开(公告)日：2017-11-28
申请号：US15421463
申请日：2017-02-01
发明人： Kousei Kawamura , Koichi Masuda , Sosuke Matsui , Yutaka Oishi , Takahiro Tsuda
CPC分类号： G06F3/0644 , G06F3/0604 , G06F3/0643 , G06F3/0682 , G06F17/30315 , G11B5/00817 , G11B20/1201 , G11B27/032 , G11B27/107 , G11B2020/1295 , G11B2220/95
摘要： A method for writing data from a table to a tape includes setting a number of partitions on the tape, where the number of partitions is greater than or equal to a number of columns of the table to be written to the tape, and writing data from each column of the table to at least one partition of the tape, the at least one partition including two or more wraps, the data is written from a top of the two or more wraps towards a bottom of the two or more wraps in a direction of a width of the at least one partition. The written data is reciprocated from a beginning of the tape to an end of the tape in a longitudinal direction of the tape such that writing of a last data entry of one column ends at a beginning of the two or more wraps.
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10.发明授权公开(公告)号：US09753659B2
公开(公告)日：2017-09-05
申请号：US15011814
申请日：2016-02-01
发明人： Tohru Hasegawa , Takamasa Hirata , Naoki Imai , Masanori Kamiya , Yutaka Oishi
CPC分类号： G06F3/0619 , G06F3/0643 , G06F3/065 , G06F3/0685 , G06F17/30091 , G06F17/30179 , G06F17/30218 , G11B5/00817 , G11B5/09 , G11B27/032 , G11B27/107 , G11B27/328 , G11B2220/95
摘要： A mechanism is provided for generating enumerated information in which a plurality of files is enumerated except entirely-invalidated files on a sequential medium. Management information for managing locations where the plurality of files on the sequential medium are recorded is acquired from the sequential medium. The enumerated information in which the plurality of files are enumerated is generated in an order according to the locations where the plurality of files are recorded on the basis of the acquired management information.
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