公开(公告)号：US11282541B2

公开(公告)日：2022-03-22

申请号：US16566528

申请日：2019-09-10

申请人： DENSO CORPORATION

发明人： Takuya Hasegawa ,  Kazuaki Hayakawa

IPC分类号： G05D1/00 ,  G11B20/12 ,  B60R16/00 ,  G06F21/60 ,  G07C5/08 ,  H04L12/28 ,  G08G1/00

摘要： A record control apparatus controls record of a data item in one or more record sections. The record control apparatus includes: a data acquisition section that acquires the data item having multiple types; a data storage section that stores in the record section, the one or more data items matching a record condition prepared in advance among the acquired data item having multiple types; and a condition change section that defines the record condition as an old record condition, and sets so that the data storage section utilizes a new record condition in place of the old record condition when receiving the new record condition different from the old condition from an outside.

公开(公告)号：US20220020394A1

公开(公告)日：2022-01-20

申请号：US17281686

申请日：2019-11-08

申请人： PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO., LTD.

发明人： Kohei NAKATA ,  Yasushi KOBAYASHI

IPC分类号： G11B20/10 ,  G11B7/0045 ,  G11B20/12

摘要： The present disclosure provides an optical disk device capable of reproducing data recorded on a high linear density optical disk stably. The optical disk device according to the disclosure is characterized by being equipped with a recording expected waveform generation circuit which generates, at the time of recording, an expected waveform that is expected to be obtained at the time of decoding; and a recording pulse generation circuit which generates a recording pulse for driving a laser with power and a time width suitable for an amplitude value of the recording expected waveform for each sampling point of the recording expected waveform.

公开(公告)号：US11222659B1

公开(公告)日：2022-01-11

申请号：US17170646

申请日：2021-02-08

申请人： QUANTUM CORPORATION

发明人： Turguy Goker

IPC分类号： G11B20/12 ,  G11B5/592 ,  G11B5/02

摘要： A magnetic tape drive for writing data to a magnetic tape that includes a first data band, a second data band, and a servo band that is positioned between the first data band and the second data band, each of the data bands including a plurality of wraps including a first wrap and a last wrap, includes a drive controller and a tape head. The drive controller defines at least a first partition and a second partition within the magnetic tape. The tape head is configured to write data to the first partition of the magnetic tape and subsequently write data to the second partition of the magnetic tape. The drive controller defines an end of the first partition to be directly after the last wrap of the first data band. The drive controller controls the tape head to write data to all of the plurality of wraps of the first data band.

公开(公告)号：US11176968B2

公开(公告)日：2021-11-16

申请号：US16660612

申请日：2019-10-22

申请人： International Business Machines Corporation

发明人： Tsuyoshi Miyamura ,  Setsuko Masuda

IPC分类号： G11B27/30 ,  G11B5/008 ,  G11B5/02 ,  G06F12/0868 ,  G05B19/045 ,  G11B20/12 ,  G05B19/042 ,  G11B27/00

摘要： An apparatus according to one embodiment includes a controller configured to control writing operations to a magnetic recording tape, and logic integrated with and/or executable by the controller for causing the controller to receive a plurality of records, store datasets associated with the plurality of records in a buffer memory, and write the datasets stored in the buffer memory to the magnetic recording tape in response to a predetermined number of datasets being stored in the buffer memory. For each of the datasets being written, an end longitudinal position indicative of a physical position where the dataset is physically written to the magnetic recording tape is determined. Moreover, for each determined end longitudinal position, the end longitudinal position and an identifier of the associated dataset are stored to a table of a dataset that is to be subsequently written to the magnetic recording tape.

公开(公告)号：US20210350824A1

公开(公告)日：2021-11-11

申请号：US17380023

申请日：2021-07-20

申请人： FUJIFILM CORPORATION

发明人： Michitaka KONDO

IPC分类号： G11B5/008 ,  G11B20/12

摘要： A recording device includes a first derivation unit that derives relevance of positions between different virtual blocks on a recording medium, a second derivation unit that derives inter-data relevance representing a possibility that plural items of data to be recorded on the recording medium are read out in parallel, a third derivation unit that uses a difference between the relevance of the positions and the inter-data relevance to derive a block for recording each of the plural items of data, and a control unit that performs control of recording the plural items of data on the recording medium according to the block derived by the third derivation unit for each of the plural items of data.

公开(公告)号：US11152018B1

公开(公告)日：2021-10-19

申请号：US17083352

申请日：2020-10-29

申请人： INTERNATIONAL BUSINESS MACHINES CORPORATION

发明人： Tohru Hasegawa ,  Tsuyoshi Miyamura ,  Shinsuke Mitsuma ,  Hiroshi Itagaki ,  Noriko Yamamoto ,  Sosuke Matsui

IPC分类号： G11B5/008 ,  G11B15/66 ,  G11B15/43 ,  G11B15/32 ,  G11B5/86 ,  G06F16/13 ,  G11B20/12 ,  G11B20/10

摘要： A computer-implemented method for indexing a tape for unmounting from a tape drive. The computer-implemented method includes: receiving a request to unmount the tape from the tape drive, wherein the tape includes an index partition and a data partition, determining that an update to the tape is not reflected in any data index written in the data partition, appending a new data index at the end of the last written data file in the data partition, wherein the new data index includes information associated with the update to the tape, unthreading the tape from the tape drive, wherein unthreading the tape from the tape drive is performed at low tension writing a metadata index to an ancillary storage device, wherein the metadata index includes information associated with the update to the tape.

公开(公告)号：US11120833B1

公开(公告)日：2021-09-14

申请号：US16942657

申请日：2020-07-29

申请人： KABUSHIKI KAISHA TOSHIBA ,  TOSHIBA ELECTRONIC DEVICES & STORAGE CORPORATION

发明人： Kiyotaka Fukawa

IPC分类号： G11B20/12 ,  G11B5/596 ,  G11B20/18

摘要： A magnetic disk device includes a disk including a plurality of areas divided in a radial direction, a head, and a controller configured to control the head to write data to a first area including a plurality of tracks that are separated from each other, and a second area including at least two adjacent tracks that partially overlap. A first distance between track centers of said two adjacent tracks in the radial direction is different from a second distance between track centers of another two adjacent tracks in the second area in the radial direction.

公开(公告)号：US20210217441A1

公开(公告)日：2021-07-15

申请号：US17219213

申请日：2021-03-31

申请人： Sony Corporation

发明人： Eiji NAKASHIO ,  Kazuo ANNO ,  Takanobu IWAMA ,  Shinya TOCHIKUBO ,  Naohiro ADACHI ,  Minoru YAMAGA ,  Masayoshi ABE

IPC分类号： G11B20/12 ,  G11B5/008 ,  G11B33/04

摘要： [Object] A cartridge memory according to an embodiment of the present technology is a cartridge memory for a recording medium cartridge, including: a memory unit; and a capacity setting unit. The memory unit has a memory capacity capable of storing management information relating to a second information recording medium configured to be capable of recording information with a second data track number larger than a first data track number. The capacity setting unit is configured to be capable of setting a data storage area limited to a first capacity capable of storing management information relating to a first information recording medium configured to be capable of recording information with the first data track number.

公开(公告)号：US11031033B2

公开(公告)日：2021-06-08

申请号：US16969876

申请日：2019-02-18

申请人： Sony Corporation

发明人： Masaru Terakawa ,  Minoru Yamaga ,  Takanobu Iwama ,  Jun Takahashi

IPC分类号： G11B23/07 ,  G11B5/78 ,  G11B5/733 ,  G11B5/592 ,  G11B5/706 ,  G11B5/008 ,  G11B5/584 ,  G11B20/12

摘要： [Object] Provided is a technology that is capable of further improving a recording density of data.
[Solving Means] A magnetic recording medium according to the present technology is a magnetic recording medium in a shape of a tape that is long in a longitudinal direction and is short in a width direction, the medium including: a base material; a magnetic layer; and a non-magnetic layer that is provided between the base material and the magnetic layer, and contains one or more types of non-magnetic inorganic particles, in which the magnetic layer includes a data band long in the longitudinal direction in which a data signal is to be written, and a servo band long in the longitudinal direction in which a servo signal is written, and in the magnetic layer, a degree of vertical orientation is greater than or equal to 65%, a half width of a solitary waveform in a reproduction waveform of the servo signal is less than or equal to 195 nm, and a thickness of the magnetic layer is less than or equal to 90 nm, and the non-magnetic layer contains at least Fe-based non-magnetic particles as the non-magnetic inorganic particles, and in the non-magnetic layer, an average particle volume of the Fe-based non-magnetic particles is less than or equal to 2.0×10−5 μm3, and a thickness of the non-magnetic layer is less than or equal to 1.1 μm.

公开(公告)号：US20210166725A1

公开(公告)日：2021-06-03

申请号：US17176901

申请日：2021-02-16

申请人： Kabushiki Kaisha Toshiba ,  Toshiba Electronic Devices & Storage Corporation

发明人： Yusuke Tomoda

IPC分类号： G11B5/127 ,  G11B20/12 ,  G11B5/012 ,  G11B5/55 ,  G11B5/31

摘要： According to one embodiment, a magnetic disk device includes a disk, a head including a main magnetic pole having a first end and a second end opposite to the first end in a radial direction of the disk, a write shield facing the main magnetic pole with a gap, and an assist element provided in the gap and at a position where a first distance between the first end and the assist element and a second distance between the second end and the assist element are different from each other, and a controller which controls a voltage applied to the assist element according to a shingled write direction in which a second track is overwritten on a first track.