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公开(公告)号：US20230359375A1
公开(公告)日：2023-11-09
申请号：US17737719
申请日：2022-05-05
发明人： Jin Quan Shen , Xiong Liu , David W. Miller , Choonwei Ng
IPC分类号： G06F3/06 , G06F9/4401
CPC分类号： G06F3/0634 , G06F9/4401 , G06F3/0658 , G06F3/0625 , G06F3/0679
摘要： A data storage system includes a plurality of data storage drives, and a system controller coupled to each data storage drive of the plurality of data storage drives. The system controller is configured to store internal drive management data for each data storage drive of the plurality of data storage drives.
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公开(公告)号：US11682427B2
公开(公告)日：2023-06-20
申请号：US17684047
申请日：2022-03-01
CPC分类号： G11B20/10388 , G11B20/10037
摘要： The technology disclosed herein pertains to a system and method for managing off-track retry. An implementation of a method of determining offset direction for read off-track retry includes storing analog to digital converter (ADC) values of data read from a data sector by a data reader in a read channel buffer, calculating an indicator value of the distribution of the ADC values, determining an amount of offset for the data reader based on the indicator value, and moving the data reader by the amount of offset before performing a read retry operation.
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公开(公告)号：US11669459B2
公开(公告)日：2023-06-06
申请号：US17411528
申请日：2021-08-25
发明人： Xiong Liu , Li Hong Zhang
IPC分类号： G06F12/10
CPC分类号： G06F12/10 , G06F2212/657
摘要： A data storage system includes a logical space having logical block addresses (LBAs) divided into non-overlapping LBA ranges, and a physical space having pairs of physical bands. The system also includes a map in which first successive alternate LBAs of each different one of the non-overlapping LBA ranges are mapped to successive adjacent physical blocks of a first physical band of each different pair of the pairs of physical bands, and second successive alternate LBAs of each different one of the non-overlapping LBA ranges are mapped to successive adjacent physical blocks of a second physical band of each different pair of the pairs of physical bands. A controller employs the map to concurrently read data from a first physical block of the first physical band of one pair of physical bands and from a first physical block of the second physical band of the same pair of physical bands.
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公开(公告)号：US20230154501A1
公开(公告)日：2023-05-18
申请号：US17526448
申请日：2021-11-15
发明人： Xiong Liu , Lihong Zhang
IPC分类号： G11B33/02
CPC分类号： G11B33/027
摘要： A hard disk drive includes a base and a cover coupled together to create an enclosure and an actuator assembly positioned in the enclosure. The actuator assembly includes a body and arms extending from the body, and the arms comprise a reinforced aluminum alloy. Magnetic recording disks are respectively positioned between pairs of the arms.
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公开(公告)号：US20230090277A1
公开(公告)日：2023-03-23
申请号：US17479239
申请日：2021-09-20
发明人： Lihong Zhang , Xiong Liu , Hong Geok Toh
IPC分类号： G06F3/06
摘要： Systems and methods are disclosed for data storage redeployment. For example, a controller of a data storage array can implement a process to determine when, or if, to redeploy a data storage device from a first data storage usage or tier having a first performance requirement to a second data storage usage or tier having a second performance requirement. In some embodiments, the first data storage tier performance requirement is for hot-data storage, and the second data storage tier performance requirement is for cold-data storage. Various criterion (e.g., a data storage device performance metric) threshold, such as a workload (e.g., LBAs written, LBAs read, or both) of the data storage device or bit error rate (BER), may be utilized in a redeployment determination.
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公开(公告)号：US11430472B1
公开(公告)日：2022-08-30
申请号：US17528296
申请日：2021-11-17
发明人： YiChao Ma , Xiong Liu , Gordon Harwood , Yongjie Tang
IPC分类号： G11B5/39 , G11B5/48 , H02K41/035
摘要： A data storage device includes a ferromagnetic center pole, a drive coil for an actuator arm assembly, and a magnetic assembly surrounding the drive coil. The drive coil surrounds the center pole and has a top, a bottom, and first and second sides; the first side is attached to the actuator arm assembly. The magnetic assembly includes a top magnet disposed above and spaced from the center pole, a bottom magnet disposed below and spaced from the center pole, and a side magnet disposed proximate the second side of the coil and spaced from the center pole. In another embodiment, a linear actuator comprises a ferromagnetic center pole, a drive coil supported for linear motion on a rail, and a magnetic assembly. A method including linearly moving a drive coil along a center pole by a magnetic field is also described.
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公开(公告)号：US11307805B2
公开(公告)日：2022-04-19
申请号：US16887257
申请日：2020-05-29
发明人： Xiong Liu , Jin Quan Shen
摘要： A disk drive comprises non-volatile rotatable media and a controller operatively coupled to the non-volatile rotatable media. The controller is configured to receive a series of host commands to be executed by the controller and generate a command execution sequence comprising the series of host commands. A task manager, integral or coupled to the controller, is configured to receive a plurality of background tasks comprising a least two priority background tasks to be executed by the controller along with execution of the series of host commands, and insert one or more of the at least two priority background tasks into the command execution sequence while maintaining a specified ratio of priority background task execution and host command execution substantially constant. The controller is configured to execute the command execution sequence with the one or more inserted priority background tasks.
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公开(公告)号：US11188252B2
公开(公告)日：2021-11-30
申请号：US16817819
申请日：2020-03-13
发明人： Jin Quan Shen , Xiong Liu , Brian T. Edgar , Jae Ik Song
IPC分类号： G06F3/06
摘要： A data storage system can connect a cache memory to a caching module, a host, and a data storage device. The caching module can employ one or more local controllers to generate a caching strategy in response to detected data storage operations and execute the caching strategy to divide the cache memory into a first pool having a first size and a second pool having a second size.
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公开(公告)号：US11183217B1
公开(公告)日：2021-11-23
申请号：US17204288
申请日：2021-03-17
发明人： Xiong Liu , Lihong Zhang
摘要： A recording system for a heat assisted magnetic recording hard disc drive (HDD) includes a head suspension pair including a first head/slider facing a first direction, and a second head/slider facing an opposite direction from the first head/slider. A number of near field transducers (NFTs) are disposed on each of the first head/slider and the second head/slider.
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公开(公告)号：US20210358519A1
公开(公告)日：2021-11-18
申请号：US16875303
申请日：2020-05-15
发明人： Qiang Bi , Jin Quan Shen , Xiong Liu , Xiang Lu , Hui Wang
IPC分类号： G11B5/55
摘要： A device includes a servo controller that includes or that is coupled to memory. The memory stores multiple distinct disturbance control schemes. The servo controller is configured to select and implement one of the disturbance control schemes in response to receiving a command from a host. The servo controller can be implemented on a system on a chip.
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