公开(公告)号：US20190103138A1

公开(公告)日：2019-04-04

申请号：US16205928

申请日：2018-11-30

Applicant: Seagate Technology LLC

Inventor： Jian Qiang ,  Xiong Liu ,  Choon Wei Ng ,  Sangyun Jung

IPC: G11B27/36 ,  G11B20/10 ,  G11B20/12 ,  G06F3/06 ,  G11B5/012

Abstract: The disclosed technology includes methods and systems that reduce off-track write retry operations in shingled magnetic recording systems. In one implementation, the method includes writing data to an initial track, determining which side of the initial track is a shingled side, calculating a percentage of position error signal (PES) at a shingled side end of the initial track (PES1) when an off-track write operation occurs, determining whether the PES1 meets a first pre-determined threshold, continue writing data to a second track responsive to determining the PES1 is below a first pre-determined threshold, calculating a percentage of PES at a shingled side end of the second track (PES2), determining whether a combined value of PES1 and PES2 is above a second predetermined threshold to determine a probability value of the initial track being erased, and continue writing to a third track if the combined value is below the second predetermined threshold.

公开(公告)号：US09972353B1

公开(公告)日：2018-05-15

申请号：US15589795

申请日：2017-05-08

Applicant: Seagate Technology LLC

Inventor： Jian Qiang ,  Xiong Liu

IPC: G11B5/09 ,  G11B20/12 ,  G11B20/10 ,  G11B27/36 ,  G11B20/18

CPC classification number: G11B20/1217 ,  G11B20/18 ,  G11B27/36 ,  G11B2020/1238 ,  G11B2220/2516

Abstract: The disclosed technology provides a method that improves SMR throughput in vibration in storage systems. In one implementation, the method comprises receiving a write command to write data on a first track in a band of a storage medium, performing a vibration detection scheme to identify vibration events, determining if a number of vibration events is above a predetermined threshold, skipping the first track responsive to determining the number of vibration events is above a predetermined threshold, seeking to a second track adjacent to the first track, increasing an OCLIM on the second track adjacent to the first track from a default OCLIM to an increased OCLIM, and shifting the writer center on the second track adjacent to the first track.

公开(公告)号：US09892749B2

公开(公告)日：2018-02-13

申请号：US15373891

申请日：2016-12-09

Applicant: SEAGATE TECHNOLOGY LLC

Inventor： Jian Qiang ,  Xiong Liu

IPC: G11B21/02 ,  G11B5/56 ,  G11B20/12

CPC classification number: G11B5/56 ,  G11B5/012 ,  G11B5/5526 ,  G11B20/10009 ,  G11B20/1217 ,  G11B2020/1238 ,  G11B2020/1292

Abstract: Methods, systems, and apparatuses are described for provisioning storage devices. An example method includes determining a write status of an adjacent track that is adjacent to a target track of a shingled magnetic recording (SMR) disk drive. The method may further include determining an offset for a write head based on the write status of the adjacent track and positioning the write head according to the offset.

公开(公告)号：US09640201B2

公开(公告)日：2017-05-02

申请号：US14250286

申请日：2014-04-10

Applicant: Seagate Technology LLC

Inventor： Jian Qiang ,  Wen Xiang Xie ,  Libin Cai ,  Andrew Kowles

IPC: G11B27/36 ,  G11B5/09 ,  G11B5/012 ,  G11B20/18

CPC classification number: G11B20/1217 ,  G11B5/012 ,  G11B5/02 ,  G11B5/09 ,  G11B2020/1232 ,  G11B2020/1238 ,  G11B2020/1869

Abstract: Implementations disclosed herein provide a method comprising comparing high-latency data sectors of a storage band, the high-latency data sectors having latency above a predetermined threshold, with target sectors for storing new data to determine one or more of the high-latency data sectors that may be skipped during retrieval of at-rest data from the storage band.

公开(公告)号：US09087545B2

公开(公告)日：2015-07-21

申请号：US13943381

申请日：2013-07-16

Applicant: Seagate Technology LLC

Inventor： Jian Qiang ,  KongQun Yang ,  YongPeng Chng ,  TseJen Lee

IPC: G11B19/04 ,  G11B20/10

CPC classification number: G11B19/042 ,  G11B5/5582 ,  G11B19/044 ,  G11B20/10 ,  G11B20/10527 ,  G11B2020/10731 ,  G11B2020/10824 ,  G11B2020/10935

Abstract: A data storage system and associated method of use may generally be directed to a memory cache that stores a plurality of pending read and write requests. A processor can be configured to prioritize the read requests in the memory cache in response to a sensed acoustic or mechanical vibration in a data storage medium.

Abstract translation: 数据存储系统和相关联的使用方法通常可以定向到存储多个待处理的读取和写入请求的存储器高速缓存。 处理器可以被配置为响应于数据存储介质中感测到的声学或机械振动来对存储器高速缓存中的读取请求进行优先级排序。

公开(公告)号：US11138105B2

公开(公告)日：2021-10-05

申请号：US16224185

申请日：2018-12-18

Applicant: Seagate Technology LLC

Inventor： LiBin Cai ,  Jian Qiang ,  Kang Hai Lim ,  Choon Wei Ng

IPC: G06F11/00 ,  G06F12/02 ,  G06F3/06 ,  G11B20/18

Abstract: A method includes moving data in a defect range from a defective area of a data storage medium to a reserve area of the data storage medium, and identifying the defect range by an address of a start of the defect range and a defect length. A logical address table is updated with the address of the start of the defect range, the defect length and an offset to the reserve area.

公开(公告)号：US20200019322A1

公开(公告)日：2020-01-16

申请号：US16034591

申请日：2018-07-13

Applicant: Seagate Technology LLC

Inventor： Jian Qiang ,  Tan Choon Kiat ,  Shen Jin Quan ,  Chng Yong Peng

IPC: G06F3/06

Abstract: A data storage device includes a data storage medium and a controller. The controller performs a boot-up sequence that includes operations that transition the data storage device from a lower operational state to a higher operational state in which the data storage device is ready to service host commands. The controller also carries out metadata updating operations independently of the boot-up sequence operations. Carrying out the metadata updating operations independently of the boot up sequence operations prevents the metadata updating operations from substantially contributing to a boot-up time.

公开(公告)号：US10528348B2

公开(公告)日：2020-01-07

申请号：US15914598

申请日：2018-03-07

Applicant: Seagate Technology LLC

Inventor： Xiong Liu ,  WenXiang Xie ,  Quan Li ,  Jian Qiang

IPC: G06F12/02 ,  G06F12/08 ,  G06F9/30 ,  G06F12/0893 ,  G06F12/0866 ,  G11B20/10 ,  G11B20/12

Abstract: In one implementation, this disclosure provides a method for executing a partial band rewrite operation comprising identifying a first track of a shingled data band to receive data of a write received at a shingled media storage device and writing a first subset of the received data to a media cache, where the first subset corresponds to the first track of the shingled data band to receive data of the write command. The method also includes writing a remaining subset of the received data to target locations within the shingled data band without updating data on the first track within the shingled data band corresponding to the first subset of the received data.

公开(公告)号：US10176849B1

公开(公告)日：2019-01-08

申请号：US15720486

申请日：2017-09-29

Applicant: Seagate Technology LLC

Inventor： Jian Qiang ,  Xiong Liu ,  Choon Wei Ng ,  Sangyun Jung

IPC: G11B20/12 ,  G11B27/36 ,  G11B5/596 ,  G11B5/012 ,  G11B20/10 ,  G06F3/06

Abstract: The disclosed technology includes methods and systems that reduce off-track write retry operations in shingled magnetic recording systems. In one implementation, the method includes writing data to an initial track, determining which side of the initial track is a shingled side, calculating a percentage of position error signal (PES) at a shingled side end of the initial track (PES1) when an off-track write operation occurs, determining whether the PES1 meets a first pre-determined threshold, continue writing data to a second track responsive to determining the PES1 is below a first pre-determined threshold, calculating a percentage of PES at a shingled side end of the second track (PES2), determining whether a combined value of PES1 and PES2 is above a second predetermined threshold to determine a probability value of the initial track being erased, and continue writing to a third track if the combined value is below the second predetermined threshold.

公开(公告)号：US09978417B1

公开(公告)日：2018-05-22

申请号：US15583727

申请日：2017-05-01

Applicant: Seagate Technology LLC

Inventor： Jian Qiang ,  HiauChoon Kee ,  QuekLeong Choo ,  Choon Wei Ng ,  WenXiang Xie

IPC: G11B5/09 ,  G11B20/12 ,  G11B5/55 ,  G11B5/49 ,  G11B5/012 ,  G11B27/36

CPC classification number: G11B20/1217 ,  G11B5/012 ,  G11B5/09 ,  G11B5/4907 ,  G11B5/5521 ,  G11B27/36 ,  G11B2020/1238

Abstract: The disclosed technology provides a system and method that improves command completion time in a shingled magnetic recording device system. In one implementation, the system and method include receiving a write command to write data to a first track in a band in a recording medium, seeking to a first track, reducing an on-cylinder limit (OCLIM) from a default OCLIM to a reduced OCLIM by a predetermined amount on the first track, performing write operations on the first track with the reduced OCLIM, and determining if a transfer of data to the first track band in the write operations has been substantially completed. Upon determining that a transfer of data to the first track in the write operations has been substantially completed, the OCLIM is restored from a reduced OCLIM to a default OCLIM and write operations are performed on tracks adjacent to the first track.