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公开(公告)号：US20220310115A1
公开(公告)日：2022-09-29
申请号：US17513601
申请日：2021-10-28
发明人： Sinji TUKADA
摘要： According to one embodiment, a disk device includes a plurality of recording media, a plurality of magnetic heads, a plurality of blades, and a housing. The recording medium has a recording surface, is rotatable around a rotation axis extending in an axial direction intersecting the recording surface, and is aligned in the axial direction. The magnetic head is configured to read and write information from and to the plurality of recording media. The plurality of first blades forms a spoiler, and the first blades of the plurality are located in a plurality of gaps provided between the plurality of recording media. The housing is provided with an inner chamber in which the plurality of recording media, the plurality of magnetic heads, and the plurality of first blades are accommodated. The number of first blades is smaller than the number of gaps.
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公开(公告)号：US20220290066A1
公开(公告)日：2022-09-15
申请号：US17193954
申请日：2021-03-05
发明人： Xingliang He , Bala Krishna Pathem
IPC分类号： C10M107/38 , C08G65/26 , G11B5/012 , G11B21/08 , G11B5/48
摘要： Low-profile thermally stable lubricants for data storage devices are provided based on multi-dentate molecular designs. One such lubricant comprises perfluoroalkyl ether segments, a divalent linking segment, and anchoring functional groups attachable to, or engageable with, a protective overcoat of a magnetic recording medium. The lubricants can be used in conjunction with a magnetic recording medium and/or a magnetic data storage system.
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公开(公告)号：US11430468B1
公开(公告)日：2022-08-30
申请号：US17326868
申请日：2021-05-21
摘要： A data storage device is disclosed comprising a head actuated over a disk comprising a plurality of data tracks, wherein each data track comprises a plurality of data sectors and the head comprises a first read element and a second read element. When a first read command is received from a host to read a plurality of data sectors from the disk, the first read element is used to read a first data sector of the first read command, and when the first read element fails to recover the first data sector of the first read command, the second read element is used to read a second data sector of the first read command.
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公开(公告)号：US11423927B2
公开(公告)日：2022-08-23
申请号：US17352703
申请日：2021-06-21
摘要： A data storage system includes a data storage foil mounted within the data storage system, the data storage foil has at least one data storage surface. The data storage system also includes a head configured to interact with the at least one data storage surface to carry out at least one of data read or data write operations.
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公开(公告)号：US20220247418A1
公开(公告)日：2022-08-04
申请号：US17582376
申请日：2022-01-24
发明人： Jason Bellorado , Marcus Marrow , Zheng Wu
摘要： Systems and methods are disclosed for magnetoresistive asymmetry (MRA) compensation using a digital compensation scheme. In certain embodiments, a method may comprise receiving an analog signal at a continuous-time front end (CTFE) circuit, and performing analog offset compensation to constrain an extremum of the analog signal to adjust a dynamic range based on an input range of an analog-to-digital converter (ADC), rather than to modify the analog signal to have a zero mean. The method may further comprise converting the analog signal to a digital sample sequence via the ADC; performing, via a digital MRA compensation circuit, digital MRA compensation on the digital sample sequence; receiving, via a digital backend (DBE) subsystem, the digital sample sequence prior to digital MRA compensation; and generating, via a DBE, a bit sequence corresponding to the analog signal based on an output of the DBE subsystem and an output of the digital MRA compensation circuit.
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36.发明授权公开(公告)号：US11386927B1
公开(公告)日：2022-07-12
申请号：US17330675
申请日：2021-05-26
摘要： A data storage device configured to access a magnetic tape is disclosed comprising a plurality of data tracks. A first head is configured to access a first data track comprising a first sync mark, and a second head is configured to access a second data track comprising a second sync mark. The first head is used to read first data from the first data track, wherein the first data comprises a plurality of symbols, and the second head is used to read the second sync mark from the second data track. The first data is symbol synchronized based on the second head reading the second sync mark from the second data track.
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公开(公告)号：US11361786B1
公开(公告)日：2022-06-14
申请号：US17180998
申请日：2021-02-22
发明人： John T. Contreras , Joey M. Poss
摘要： A data storage device is disclosed comprising a head actuated over a magnetic media, wherein the head comprises a read element configured to generate a read signal when reading data from the magnetic media. A common-source common-gate (CS-CG) differential amplifier is coupled to the read element through a transmission line having a transmission line impedance Z0. A feedback circuit is coupled between an output of the CS-CG differential amplifier and an input of the CS-CG differential amplifier, wherein the feedback circuit is configured so that an input impedance of the CS-CG differential amplifier substantially matches the transmission line impedance Z0.
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公开(公告)号：US11348611B1
公开(公告)日：2022-05-31
申请号：US17233818
申请日：2021-04-19
摘要： In one aspect, a data storage device includes a disc, an arm, a head, a linear driver, and an elevator. The disc has a read/write surface defining an x-y plane. The arm has a head end that is movable relative to the disc. The head is configured to interact with the read/write surface. The linear driver is configured to move the arm along a substantially straight line in the x-y plane. The elevator is configured to move the arm in a z direction. In another aspect, rather than a linear driver, the data storage device includes a rotary actuator and a pivot actuator. The arm includes a first portion and a load beam. The rotary actuator is configured to move the first portion about a first pivot axis; the pivot actuator is configured to move the load beam about a second pivot axis relative to the first portion.
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公开(公告)号：US11348602B2
公开(公告)日：2022-05-31
申请号：US17364302
申请日：2021-06-30
发明人： Yuki Kawamitsu
IPC分类号： G11B5/012
摘要： According to one embodiment, a magnetic disk includes a disk, first and second heads which write data to the disk and read data from the disk, a first actuator includes the first head, a second actuator includes the second head, first and second controllers which control the first head, the second head, the first actuator and the second actuator, an auxiliary power supply which supplies power when power from a power supply is shut off, and a power supply detection unit which makes power supplied from the auxiliary power supply to the first controller higher than the power supplied from the auxiliary power supply to the second controller when shutoff of power from the power supply is detected.
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公开(公告)号：US11341989B2
公开(公告)日：2022-05-24
申请号：US17039038
申请日：2020-09-30
摘要： Systems and methods are disclosed for dynamically adjusting parameters used during a read operation to reduce stress on a read head. In certain embodiments, an apparatus may comprise a read head configured to read data stored to a data storage medium, and a control circuit that controls a parameter of the read head influencing the read head's ability to accurately read data. The control circuit may be configured to extend the working lifespan of the read head by monitoring a read performance of the read head, and adjusting the parameter to reduce the read performance when the read performance is greater than a first threshold.
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