公开(公告)号：US20170316804A1

公开(公告)日：2017-11-02

申请号：US15414288

申请日：2017-01-24

Applicant: Seagate Technology LLC

Inventor： Minjie Ma ,  Tim Rausch ,  Edward Charles Gage ,  Pu-Ling Lu

IPC: G11B20/18 ,  G11B5/09 ,  G11B7/1267 ,  G11B5/00

CPC classification number: G11B20/1816 ,  G11B5/09 ,  G11B5/455 ,  G11B7/1267 ,  G11B20/10305 ,  G11B2005/0021

Abstract: An apparatus and method provide for performing, using a heat-assisted magnetic recording head, multiple sequential writes to a recording medium, and recording a metric of write performance for each of the writes. The apparatus and method further provide for calculating fluctuations in the metric, detecting whether the head has a laser mode hopping problem using the metric fluctuations, and categorizing a severity of the laser mode hopping problem.

公开(公告)号：US09805741B1

公开(公告)日：2017-10-31

申请号：US15417661

申请日：2017-01-27

Applicant: Seagate Technology LLC

Inventor： Minjie Ma ,  Steven Granz ,  Kaizhong Gao

IPC: G11B20/12 ,  G11B5/09 ,  G11B5/012 ,  G11B5/00

CPC classification number: G11B5/09 ,  G11B5/012 ,  G11B5/02 ,  G11B20/105 ,  G11B2005/0021

Abstract: A storage device includes a storage medium and a storage device controller that selectively varies a value of at least one write current parameter to generate alternating data tracks of variable written track width. According to one implementation, the alternating data tracks of variable written track width are generated with a single writer.

公开(公告)号：US09792949B1

公开(公告)日：2017-10-17

申请号：US15414288

申请日：2017-01-24

Applicant: Seagate Technology LLC

Inventor： Minjie Ma ,  Tim Rausch ,  Edward Charles Gage ,  Pu-Ling Lu

IPC: G11B11/00 ,  G11B20/18 ,  G11B5/00 ,  G11B7/1267 ,  G11B5/09

CPC classification number: G11B20/1816 ,  G11B5/09 ,  G11B5/455 ,  G11B7/1267 ,  G11B20/10305 ,  G11B2005/0021

Abstract: An apparatus and method provide for performing, using a heat-assisted magnetic recording head, multiple sequential writes to a recording medium, and recording a metric of write performance for each of the writes. The apparatus and method further provide for calculating fluctuations in the metric, detecting whether the head has a laser mode hopping problem using the metric fluctuations, and categorizing a severity of the laser mode hopping problem.

公开(公告)号：US09607631B2

公开(公告)日：2017-03-28

申请号：US14950577

申请日：2015-11-24

Applicant: Seagate Technology LLC

Inventor： Tim Rausch ,  Minjie Ma ,  Steven Granz ,  Kaizhong Gao ,  Wenzhong Zhu ,  Edward C. Gage

IPC: G11B5/09 ,  G11B5/012 ,  G11B11/105 ,  G11B5/00

CPC classification number: G11B20/1889 ,  G11B5/012 ,  G11B5/09 ,  G11B5/59633 ,  G11B5/59638 ,  G11B5/6088 ,  G11B11/10506 ,  G11B11/10515 ,  G11B11/10521 ,  G11B11/10595 ,  G11B20/12 ,  G11B20/1217 ,  G11B20/1833 ,  G11B27/3027 ,  G11B2005/0021 ,  G11B2020/1222 ,  G11B2020/1232 ,  G11B2020/1238 ,  G11B2020/1292

Abstract: A storage device includes a storage controller configured to write a band of data tracks using a first recording method until criterion is met. The first method may be a conventional recording method. After the criterion is met, the storage controller is configured to write data to the band using a second recording method. The second recording method may be an enhanced capacity recording method such as interlaced magnetic recording (IMR) or shingled magnetic recording (SMR).

公开(公告)号：US20160148637A1

公开(公告)日：2016-05-26

申请号：US14806417

申请日：2015-07-22

Applicant: Seagate Technology LLC

Inventor： Tim Rausch ,  Minjie Ma ,  Kaizhong Gao ,  Edward Gage

IPC: G11B7/1263 ,  G11B20/18 ,  G11B20/12 ,  G11B5/09

CPC classification number: G11B20/1889 ,  G11B5/012 ,  G11B5/09 ,  G11B5/59633 ,  G11B5/59638 ,  G11B5/6088 ,  G11B11/10506 ,  G11B11/10515 ,  G11B11/10521 ,  G11B11/10595 ,  G11B20/12 ,  G11B20/1217 ,  G11B20/1833 ,  G11B27/3027 ,  G11B2005/0021 ,  G11B2020/1222 ,  G11B2020/1232 ,  G11B2020/1238 ,  G11B2020/1292

Abstract: A storage device disclosed herein stores data on a storage media using interlaced magnetic recording (IMR) and it includes a storage controller configured to determine power levels applied to the power source such that power levels applied to heat various tracks can be different from each other. An implementation of the storage device determines the track density, linear densities and power levels for even and odd tracks in IMR HAMR for the storage media.

公开(公告)号：US09741363B2

公开(公告)日：2017-08-22

申请号：US14806358

申请日：2015-07-22

Applicant: Seagate Technology LLC

Inventor： Minjie Ma ,  Kaizhong Gao ,  Edward Gage ,  Tim Rausch

IPC: G11B5/02 ,  G11B5/09 ,  G11B5/012 ,  G11B20/18 ,  G11B11/105 ,  G11B5/00 ,  G11B20/12 ,  G11B5/596 ,  G11B5/60

CPC classification number: G11B20/1889 ,  G11B5/012 ,  G11B5/09 ,  G11B5/59633 ,  G11B5/59638 ,  G11B5/6088 ,  G11B11/10506 ,  G11B11/10515 ,  G11B11/10521 ,  G11B11/10595 ,  G11B20/12 ,  G11B20/1217 ,  G11B20/1833 ,  G11B27/3027 ,  G11B2005/0021 ,  G11B2020/1222 ,  G11B2020/1232 ,  G11B2020/1238 ,  G11B2020/1292

Abstract: A storage device disclosed herein stores data on a storage media using interlaced magnetic recording (IMR) and it includes a storage controller configured to determine power levels applied to the power source such that power levels applied to heat various tracks can be different from each other. An implementation of the storage device determines the track density, linear densities and power levels for even and odd tracks in IMR HAMR for the storage media.

公开(公告)号：US09536550B1

公开(公告)日：2017-01-03

申请号：US14945715

申请日：2015-11-19

Applicant: Seagate Technology LLC

Inventor： Minjie Ma ,  Edmun Seng ,  Tim Rausch ,  Edward Charles Gage

IPC: G11B27/36 ,  G11B5/09 ,  G11B5/455 ,  G11B5/00

CPC classification number: G11B5/455 ,  G11B5/5534 ,  G11B2005/0021

Abstract: A cross-track profile of a known good test track on a recording medium is read during operation of a data storage device. Two or more center locations of the test track are determined at two or more different amplitude levels via a read transducer. A health condition of the read transducer is determined by comparing the two or more center locations of the test track with one another.

Abstract translation: 在数据存储设备的操作期间读取记录介质上已知的良好测试轨迹的交叉轨道轮廓。 测试轨道的两个或更多个中心位置通过读取换能器以两个或多个不同的振幅水平确定。 通过将测试轨道的两个或更多个中心位置相互比较来确定读取换能器的健康状况。

公开(公告)号：US20160240216A1

公开(公告)日：2016-08-18

申请号：US14624089

申请日：2015-02-17

Applicant: Seagate Technology LLC

Inventor： Minjie Ma ,  Edward Charles Gage ,  Kaizhong Gao

IPC: G11B5/09 ,  G11B20/12 ,  G11B7/1263

CPC classification number: G11B7/1263 ,  G11B5/02 ,  G11B7/126 ,  G11B11/10515 ,  G11B11/10595 ,  G11B20/1217 ,  G11B2005/0021 ,  G11B2020/1232

Abstract: An apparatus comprises a controller configured to apply a writing configuration (WC) to a heat-assisted magnetic recording head to write data to a recording medium. The recording medium includes a plurality of sectors. The controller is further configured to determine an optimized WC for each of the plurality of sectors and initiate a write operation to one of the plurality of sectors. The write operation is configured to be performed by the head utilizing the optimized WC for the respective sector.

Abstract translation: 一种装置包括：控制器，被配置为将写入配置（WC）应用于热辅助磁记录头以将数据写入记录介质。 记录介质包括多个扇区。 所述控制器还被配置为为所述多个扇区中的每一个确定优化的WC，并且启动对所述多个扇区之一的写入操作。 写入操作被配置为由头部使用针对相应扇区的优化的WC执行。

公开(公告)号：US20160148626A1

公开(公告)日：2016-05-26

申请号：US14950577

申请日：2015-11-24

Applicant: Seagate Technology LLC

Inventor： Tim Rausch ,  Minjie Ma ,  Steven Granz ,  Kaizhong Gao ,  Wenzhong Zhu ,  Edward C. Gage

IPC: G11B5/09 ,  G11B20/12 ,  G11B5/012

CPC classification number: G11B20/1889 ,  G11B5/012 ,  G11B5/09 ,  G11B5/59633 ,  G11B5/59638 ,  G11B5/6088 ,  G11B11/10506 ,  G11B11/10515 ,  G11B11/10521 ,  G11B11/10595 ,  G11B20/12 ,  G11B20/1217 ,  G11B20/1833 ,  G11B27/3027 ,  G11B2005/0021 ,  G11B2020/1222 ,  G11B2020/1232 ,  G11B2020/1238 ,  G11B2020/1292

Abstract: A storage device includes a storage controller configured to write a band of data tracks using a first recording method until criterion is met. The first method may be a conventional recording method. After the criterion is met, the storage controller is configured to write data to the band using a second recording method. The second recording method may be an enhanced capacity recording method such as interlaced magnetic recording (IMR) or shingled magnetic recording (SMR).

Abstract translation: 存储装置包括存储控制器，该存储控制器被配置为使用第一记录方法写入数据轨道带，直到满足标准。 第一种方法可以是常规记录方法。 在满足标准之后，存储控制器被配置为使用第二记录方法将数据写入频带。 第二记录方法可以是诸如隔行磁记录（IMR）或带状磁记录（SMR）的增强容量记录方法。

公开(公告)号：US10204655B1

公开(公告)日：2019-02-12

申请号：US15784509

申请日：2017-10-16

Applicant: Seagate Technology LLC

Inventor： Minjie Ma ,  Tim Rausch ,  Edward Charles Gage ,  James Dillon Kiely ,  Paul M. Jones ,  Yang Yang

IPC: G11B11/00 ,  G11B21/10 ,  G11B5/00 ,  G11B7/126 ,  G11B7/1267 ,  G11B7/1263 ,  G11B5/60

Abstract: Data is written to data sectors of a heat-assisted magnetic recording (HAMR) medium using a laser of a HAMR head supplied with a sum of an operational current and a threshold current. A service current is supplied to the laser when the head is over servo sectors of the medium, such that a temperature of the medium at the servo sectors is greater than or equal to a temperature of the head when over the servo sectors.