-
公开(公告)号：US20240321301A1
公开(公告)日：2024-09-26
申请号：US18678272
申请日：2024-05-30
申请人： FUJIFILM Corporation
发明人： Norihito KASADA
CPC分类号： G11B5/588 , G11B5/00817
摘要： Provided is a magnetic tape apparatus. During running of a magnetic tape in the magnetic tape apparatus, an angle θ formed by an axis of an element array of a magnetic head with respect to a width direction of the magnetic tape is changed. The magnetic tape satisfies Expression 1, the Equation 1: TDSage+TDSenv−TC≤0.10 μm. In Expression 1, TDSage is a maximum value of an absolute value of a difference between a servo band interval obtained before storage and a servo band interval obtained after the storage in a predetermined environment for 36 hours. TDSenv is a value calculated by multiplying a difference between a maximum value and a minimum value in the servo band intervals obtained in each of predetermined five environments by ½, and TC is a value calculated by TC=L{cos(θinitial−Δθ)−cos(θinitial+Δθ)}.
-
公开(公告)号：US12073862B2
公开(公告)日：2024-08-27
申请号：US18181458
申请日：2023-03-09
CPC分类号： G11B5/7366 , G11B5/00813 , G11B5/02 , G11B2005/0021
摘要： A heat-assisted magnetic recording (HAMR) device is configured to write regions of neutral polarity on a magnetic media during a same pass of the recording head in which other regions are written of positive polarity and negative polarity. The various disclosed write techniques may facilitate creation of “zero state” (substantially net zero polarity) transition zones between each pair of data bits of opposite polarity and/or may facilitate the encoding of three different logical states (e.g., 1, 0, and −1) on the media.
-
公开(公告)号：US12057148B2
公开(公告)日：2024-08-06
申请号：US18172693
申请日：2023-02-22
申请人： FUJIFILM Corporation
发明人： Toru Nakao , Tetsuya Kaneko , Yoichi Akano
CPC分类号： G11B5/56 , G11B5/00821
摘要： A magnetic head includes a pair of servo reading elements corresponding to a pair of servo bands adjacent to each other in a width direction. A processor acquires a first signal based on a first result obtained by reading a servo pattern in a first servo band by a first servo reading element included in a pair of servo reading elements, acquires a second signal based on a second result obtained by reading the servo pattern in a second servo band by a second servo reading element included in the pair of servo reading elements, and outputs a deviation amount signal corresponding to a deviation amount in time between the first signal and the second signal.
-
公开(公告)号：US20240249750A1
公开(公告)日：2024-07-25
申请号：US18099833
申请日：2023-01-20
CPC分类号： G11B23/502 , G11B5/00813 , G11B15/05 , G11B20/18
摘要： In one general embodiment, an apparatus includes a magnetic head, and a controller coupled to the magnetic head, the controller being configured to perform a method that includes measuring humidity in a vicinity of the apparatus in response to detection of an error while performing a data operation on a magnetic recording tape. An error recovery procedure to remove debris on the tape is executed in response to detection of an error and the measured humidity exceeding a predefined upper limit value. An error recovery procedure to remove debris adhering to the magnetic head is executed in response to detection of an error and the measured humidity being below a predefined lower limit value.
-
公开(公告)号：US12027185B2
公开(公告)日：2024-07-02
申请号：US18145539
申请日：2022-12-22
申请人： FUJIFILM Corporation
发明人： Yoichi Akano , Toru Nakao , Tetsuya Kaneko
CPC分类号： G11B27/36 , G11B5/00813
摘要： A detection device includes a processing device and a storage medium. The processing device stores a result of reading a servo pattern by a servo reading element from a magnetic tape in which the servo pattern is recorded in a servo band, in the storage medium as an ideal waveform signal indicating an ideal waveform, acquires a servo band signal which is a result of reading the servo band by the servo reading element, and detects a servo pattern signal indicating the servo pattern by comparing the ideal waveform signal stored in the storage medium with the servo band signal.
-
公开(公告)号：US20240212710A1
公开(公告)日：2024-06-27
申请号：US18538634
申请日：2023-12-13
申请人： FUJIFILM Corporation
发明人： So MATSUYAMA
CPC分类号： G11B5/78 , G11B5/00817 , G11B5/7356 , G11B5/7369 , G11B2220/956
摘要： The magnetic tape includes a non-magnetic support, and a magnetic layer containing a ferromagnetic powder. In a binarized image of a secondary electron image obtained by imaging a surface of the magnetic layer with a scanning electron microscope at an acceleration voltage of 5 kV, the number of bright regions having an equivalent circle diameter of 75 nm or more and less than 125 nm is 100 or more and 4000 or less, and standard deviation σ of the number of the bright regions in a width direction of the surface of the magnetic layer is 400 or less.
-
公开(公告)号：US12020731B1
公开(公告)日：2024-06-25
申请号：US18211279
申请日：2023-06-18
发明人： Tsuyoshi Miyamura , Setsuko Masuda
CPC分类号： G11B5/00813 , G06F3/0619 , G06F3/0653 , G06F3/0682 , G11B27/107 , G06F2212/213 , G11B15/662
摘要： Provided is a system, method, and computer program product for minimizing high resolution tape directory (HRTD) recovery time when a HRTD is invalid. A tape drive may load a tape in the tape drive. In response to receiving a write command or a read command at a beginning of tape (BOT) position, the tape drive may execute the write command or the read command without performing HRTD recovery. In response to receiving the write command or the read command at a position other than the BOT position, the tape drive may determine if the HRTD is valid. In response to determining the HRTD is not valid, the tape drive may clear a timer.
-
公开(公告)号：US20240203451A1
公开(公告)日：2024-06-20
申请号：US18538626
申请日：2023-12-13
申请人： FUJIFILM Corporation
发明人： Norihito KASADA
CPC分类号： G11B5/65 , G11B5/00813
摘要： The magnetic tape includes a non-magnetic support, and a magnetic layer containing a ferromagnetic powder. One or more components selected from the group consisting of a fatty acid and a fatty acid amide are included in a portion on the non-magnetic support on a magnetic layer side, a C—H derived C concentration calculated from a C—H peak surface area ratio of C1s spectra obtained by X-ray photoelectron spectroscopy performed on a surface of the magnetic layer at a photoelectron take-off angle of 10 degrees is 50 at % or more, and standard deviation σ of the C—H derived C concentration in a width direction of the surface of the magnetic layer is 2.0 at % or less.
-
公开(公告)号：US12001405B2
公开(公告)日：2024-06-04
申请号：US16817674
申请日：2020-03-13
发明人： Tohru Hasegawa , Tsuyoshi Miyamura , Atsushi Abe , Shinsuke Mitsuma , Noriko Yamamoto , Sosuke Matsui
IPC分类号： G06F16/185 , G06F16/11 , G06Q20/14 , G11B5/008 , G11B5/86
CPC分类号： G06F16/185 , G06F16/119 , G06Q20/145 , G11B5/00813 , G11B5/86
摘要： Described are techniques for a tape unmounting protocol. The techniques include selecting a tape for unmounting from a plurality of tape drives, where the tape for unmounting includes a remaining capacity below a first threshold and a number of migrated files below a second threshold. The techniques further include unmounting the tape for unmounting from a tape drive.
-
公开(公告)号：US11978479B2
公开(公告)日：2024-05-07
申请号：US17845792
申请日：2022-06-21
发明人： Erhard Schreck
CPC分类号： G11B15/442 , G11B5/00813 , G11B15/32
摘要： The present disclosure generally relates to a tape drive having a regenerative braking system. The tape drive comprises a first reel; a first spindle coupled to the first reel; a first motor coupled to the first spindle, wherein the first motor is configured to rotate the first spindle; a second reel; a second spindle coupled to the second reel; a second motor coupled to the second spindle, wherein the second motor is configured to rotate the second spindle; and a regenerative braking circuit coupled to the first motor and the second motor, wherein during a braking of the motors, the regenerative braking circuit and the motors convert a mechanical energy of the motors to electrical energy for a power storage mechanism, thereby providing resistance to the rotation of the spindles.
-
-
-
-
-
-
-
-
-
搜索结果
3092 条记录 (耗时 0.021 秒)
