MAGNETIC HEAD, MAGNETIC TAPE, MAGNETIC TAPE CARTRIDGE, MAGNETIC TAPE DRIVE, AND MAGNETIC TAPE READING METHOD

    公开(公告)号:US20240363142A1

    公开(公告)日:2024-10-31

    申请号:US18768256

    申请日:2024-07-10

    IPC分类号: G11B5/55 G11B5/592

    CPC分类号: G11B5/5508 G11B5/5928

    摘要: A magnetic head includes a first servo reading element pair, a second servo reading element pair, and a plurality of magnetic elements. The first servo reading element pair consists of a first servo reading element and a second servo reading element, the second servo reading element pair consists of a third servo reading element and a fourth servo reading element, the first servo reading element and the third servo reading element are disposed on one end side of the plurality of magnetic elements and read one servo band of the pair of servo bands, and the second servo reading element and the fourth servo reading element are disposed on the other end side of the plurality of magnetic elements and read the other servo band of the pair of servo bands.

    DISK DEVICE
    2.
    发明公开
    DISK DEVICE 审中-公开

    公开(公告)号:US20240321292A1

    公开(公告)日:2024-09-26

    申请号:US18461944

    申请日:2023-09-06

    发明人: Yuki SATO

    摘要: According to one embodiment, a disk device includes a magnetic disk, a magnetic head, a suspension, a ramp mechanism, a housing, and a screw. The suspension holds the magnetic head and moves between a load position and an unload position. The ramp mechanism includes a ramp member that holds the suspension at the unload position, and a cylindrical member with a through hole, being fixed to the ramp member. The housing includes a first support surface with a screw hole supporting the cylindrical member. The screw includes a screw head and a screw shaft fitted into the screw hole through the through hole. The screw holds the cylindrical member between the screw head and the first support surface. A contact area between the cylindrical member and the housing is set to larger than a contact area between the cylindrical member and the screw head.

    Magnetic disk device
    5.
    发明授权

    公开(公告)号:US12014757B2

    公开(公告)日:2024-06-18

    申请号:US18169407

    申请日:2023-02-15

    摘要: According to one embodiment, a disk device includes a rotatable magnetic disk, an actuator which supports and moves a head, a ramp which holds the head at an unloaded position, a motor which rotates the magnetic disk, and a controller which performs a load operation and a seek operation. When a radial travel speed of the head during the load operation is referred to as Vr1, a circumferential travel speed of the head is referred to as Vt1, a radial travel speed of the head during the seek operation is referred to as Vrs, and a circumferential travel speed is referred to as Vts, the controller controls at least one of the radial travel speed of the head and number of revolutions of the magnetic disk to satisfy a relationship (Vr1/Vt1)

    Magnetic disk device and method
    6.
    发明授权

    公开(公告)号:US11955146B2

    公开(公告)日:2024-04-09

    申请号:US18179824

    申请日:2023-03-07

    发明人: Naoki Tagami

    摘要: According to one embodiment, in a magnetic disk, a plurality of first servo sectors is arranged at intervals in the circumferential direction. Each of the plurality of first servo sectors includes a first area and a second area. First information including a preamble, a servo mark, and a Gray code is written in the first area. The second area is disposed after the first area in a write and read direction along the circumferential direction, and second information including a burst pattern is written in the second area. The plurality of first servo sectors includes a plurality of second servo sectors and a plurality of third servo sectors. The circumferential length of a first area included in each of the plurality of third servo sectors is longer than the circumferential length of a first area included in each of the plurality of second servo sectors.

    Disk device
    10.
    发明授权

    公开(公告)号:US11817136B2

    公开(公告)日:2023-11-14

    申请号:US17892917

    申请日:2022-08-22

    发明人: Takeyori Hara

    IPC分类号: G11B5/596 G11B5/55

    摘要: According to an embodiment, in a disk device, a first actuator moves a first head with respect to a first surface of a first disk. A controller controls positioning of the first head via the first actuator and controls a write operation to the first disk by the first head. The controller acquires information regarding a state of a vibration source, changes a value of a coefficient for estimating a predicted position of the first head according to the information regarding the state of the vibration source, estimates a predicted position of the first head with the value of the coefficient changed, performs a write operation by the first head in a case where the predicted position estimated is equal to or less than a threshold, and prohibits the write operation by the first head in a case where the predicted position estimated exceeds the threshold.