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1. 发明授权

US08699162B1 Shingled magnetic recording disk drive with multiple data zones containing different numbers of error-correction-code sectors 有权
标题翻译：具有包含不同数目的纠错码扇区的多个数据区的带磁性磁记录磁盘驱动器
公开(公告)号：US08699162B1
公开(公告)日：2014-04-15
申请号：US13680089
申请日：2012-11-18
申请人： HGST Netherlands B.V.
发明人： Michael Konrad Grobis , Manfred Ernst Schabes
IPC分类号： G11B5/00
CPC分类号： G11B5/09 , G11B5/5547 , G11B5/5565 , G11B20/18
摘要： A shingled magnetic recording disk drive with sector error correction code (ECC) has the disk recording surface divided into multiple zones. Each zone is assigned a sector-ECC strength, i.e., a unique number of ECC sectors associated with a block of data sectors. The zone in which data is to be written is determined from the time average of the position-error signal (PES), which is an indication of the track misregistration (TMR) and thus the current environmental condition to which the HDD is subjected.
摘要翻译：具有扇区纠错码（ECC）的带有磁带的磁记录磁盘驱动器将磁盘记录表面分成多个区域。每个区域被分配扇区ECC强度，即与数据扇区块相关联的ECC扇区的唯一数量。数据要被写入的区域是由位置误差信号（PES）的时间平均值确定的，位置误差信号是作为轨道重合失调（TMR）的指示，因此是HDD受到的当前环境状况。

2. 发明授权

US09818440B1 Heat assisted magnetic recording system having at least three possible magnetic configurations per physical bit 有权
公开(公告)号：US09818440B1
公开(公告)日：2017-11-14
申请号：US15194412
申请日：2016-06-27
申请人： HGST Netherlands B.V.
发明人： Pierre-Olivier Jubert , Michael Konrad Grobis , Richard Leo Galbraith , Roger William Wood
IPC分类号： G11B5/02 , G11B5/62 , G11B5/00
CPC分类号： G11B5/64 , G11B2005/0021
摘要： According to one embodiment, a heat assisted magnetic recording system includes a magnetic recording medium comprising a magnetic recording layer, where the magnetic recording layer includes a plurality of physical bits. Each physical bit has a perpendicular magnetic anisotropy and one of at least three magnetic states, where the at least three magnetic states include a +1 magnetic state, a 0 magnetic state, and a −1 magnetic state.

3. 发明授权

US08786972B2 Magnetic recording disk drive with method for recovery of data from failed data sectors 有权
标题翻译：具有从故障数据扇区恢复数据的方法的磁记录磁盘驱动器
公开(公告)号：US08786972B2
公开(公告)日：2014-07-22
申请号：US13680087
申请日：2012-11-18
申请人： HGST Netherlands B.V.
发明人： Michael Konrad Grobis , Kurt Allan Rubin
IPC分类号： G11B5/02 , G11C29/00
CPC分类号： G11B20/1889 , G11B20/182 , G11B20/1833 , G11B2020/1836 , G11B2020/185 , G11B2220/252
摘要： A magnetic recording disk drive determines the locations of defective bits in a failed data sector, and allows for the error correction code (ECC) to correctly decode the data from the sector. After a sector has failed decoding, the digitized waveform and the read channel state from the failed sector are stored in memory. A nondata pattern is written to the failed sector and read back to determine the locations of the defective data bits in the failed sector, which are then used to update the read channel state. The data pattern from the failed sector, with the identified bit error locations, is attempted to be decoded. If the decoding is successful then the sector is marked as bad and the correctly decoded data pattern is written to a different region of the disk, for example physical sectors specifically intended for use as spare sectors.
摘要翻译：磁记录盘驱动器确定故障数据扇区中的故障位的位置，并允许纠错码（ECC）正确解码扇区中的数据。在扇区解码失败之后，数字波形和来自故障扇区的读通道状态被存储在存储器中。将非数据模式写入故障扇区并读回以确定故障扇区中的有缺陷数据位的位置，然后将其用于更新读通道状态。尝试对来自故障扇区的数据模式与识别的位错误位置进行解码。如果解码成功，则扇区被标记为坏，并且将正确解码的数据模式写入到盘的不同区域，例如专门用作备用扇区的物理扇区。

4. 发明授权

US09601145B1 Heat-assisted magnetic recording (HAMR) disk with multiple continuous magnetic recording layers 有权
公开(公告)号：US09601145B1
公开(公告)日：2017-03-21
申请号：US15164685
申请日：2016-05-25
申请人： HGST Netherlands B.V.
发明人： Michael Konrad Grobis , Virat Vasav Mehta , Gregory John Parker , Hal Jervis Rosen , Bruce David Terris
IPC分类号： G11B5/33 , G11B11/00 , G11B5/66 , G11B5/65 , G11B5/00
CPC分类号： G11B5/66 , G11B5/65 , G11B5/653 , G11B2005/0021
摘要： A heat-assisted magnetic recording (HAMR) disk has multiple independent data layers, each data layer being a continuous non-patterned layer of magnetizable material. Each data layer can store data independent and not related to the data stored in the other data layers. The data layers are separated by a nonmagnetic spacer layer (SL) and each data layer is formed of high-anisotropy (Ku) material so that the coercivities of lower and upper data layers (RL1 and RL2) are greater than the magnetic write field. At a high laser power both RL1 and RL2 are heated to above their respective Curie temperatures and data is recorded in both RL1 and RL2. At low laser power only upper RL2 is heated to above its Curie temperature and data is recorded only in RL2. The SL prevents lower RL1 from being heated to above its Curie temperature at low laser power.

5. 发明授权

US08824075B2 Templated granular magnetic recording media 有权
标题翻译：模板粒状磁记录介质
公开(公告)号：US08824075B2
公开(公告)日：2014-09-02
申请号：US13720952
申请日：2012-12-19
申请人： HGST Netherlands B.V.
发明人： Michael Konrad Grobis , Manfred E. Schabes
IPC分类号： G11B27/36 , G11B5/09
CPC分类号： G11B5/855 , G11B5/012 , G11B5/59616 , G11B5/59638 , G11B5/743 , G11B5/82 , G11B2005/0021 , G11B2005/0024
摘要： A system and method for recording data to a perpendicular magnetic recording media having a highly ordered granular structure. The method includes the synchronization of write frequency and write phase to the granular structure of the magnetic media optimize performance of the magnetic data recording system by minimizing bit error rate.
摘要翻译：一种用于将数据记录到具有高度粒度结构的垂直磁记录介质的系统和方法。该方法包括写入频率和写入阶段与磁介质的粒状结构的同步，通过最小化误码率来优化磁数据记录系统的性能。

6. 发明授权

US09530445B1 Perpendicular heat-assisted magnetic recording (HAMR) medium with a perovskite oxide intermediate layer 有权
标题翻译：具有钙钛矿氧化物中间层的垂直热辅助磁记录（HAMR）介质
公开(公告)号：US09530445B1
公开(公告)日：2016-12-27
申请号：US15002543
申请日：2016-01-21
申请人： HGST Netherlands B.V.
发明人： Michael Konrad Grobis , Olav Hellwig , Bruce David Terris , Sung Hun Wee
IPC分类号： G11B5/74 , G11B11/00 , G11B5/65 , G11B5/738 , G11B5/64 , G11B5/73 , G11B5/40 , G11B5/00
CPC分类号： G11B5/40 , G11B5/65 , G11B5/732 , G11B5/7325 , G11B5/746 , G11B2005/0021
摘要： A heat-assisted magnetic recording medium has a heat-sink layer, a chemically-ordered FePt alloy magnetic layer and a perovskite oxide intermediate layer between the heat-sink layer and the magnetic layer. The perovskite oxide intermediate layer may function as both a seed layer for the magnetic layer and a thermal barrier layer, as just a seed layer for the magnetic layer, or as just a thermal barrier layer. The intermediate layer is formed of a material selected from a ABO3 perovskite oxide (where A is selected from one or more of Ba, Sr and Ca and B is selected from one or more of Zr, Ce, Hf, Sn, Ir, and Nb), and a A2REBO6 rare earth double perovskite oxide (where RE is a rare earth element, A is selected from Ba, Sr and Ca, and B is selected from Nb and Ta).
摘要翻译：热辅助磁记录介质在散热层和磁性层之间具有散热层，化学有序的FePt合金磁性层和钙钛矿氧化物中间层。钙钛矿氧化物中间层既可以用作磁性层的种子层，也可以作为仅用于磁性层的种子层，或仅作为热障壁的热障壁。中间层由选自ABO 3钙钛矿氧化物（其中A选自Ba，Sr和Ca中的一种或多种）中选择的材料形成，B选自Zr，Ce，Hf，Sn，Ir和Nb中的一种或多种）和A2REBO6稀土双钙钛矿氧化物（其中RE为稀土元素，A选自Ba，Sr和Ca，B选自Nb和Ta）。

7. 发明授权

US08737002B1 Magnetic recording disk with patterned nondata islands with different sizes and opposite polarity and method for making the disk 有权
标题翻译：具有不同尺寸和相反极性的图案化非磁性岛的磁记录盘以及用于制造磁盘的方法
公开(公告)号：US08737002B1
公开(公告)日：2014-05-27
申请号：US13850582
申请日：2013-03-26
申请人： HGST Netherlands B.V.
发明人： Abhishek Dhanda , Michael Konrad Grobis , Toshiki Hirano , Tetsuo Semba
IPC分类号： G11B5/09
CPC分类号： G11B5/746 , G11B5/59655
摘要： A magnetic recording disk has nondata regions that contain a group of first nondata islands with one area and a magnetization in one perpendicular direction, and a group of second nondata islands with a smaller area and a magnetization in the opposite direction. To magnetize the nondata islands with the proper magnetization directions, a DC magnetic field much greater than the coercive field of the magnetic recording layer is applied in one direction to the entire disk to magnetize all of the nondata islands in the same direction. Then the disk is heated to a predetermined temperature, and while the disk is at this temperature, a second DC magnetic field less than the first DC magnetic field is applied for a predetermined time in the opposite direction to the entire disk. This reverses the magnetization direction of the smaller islands without switching the magnetization of the larger islands.
摘要翻译：磁记录盘具有包含一组区域和一个垂直方向上的磁化的一组第一非磁性岛的非磁性区域，以及具有相反方向的较小面积和磁化强度的一组第二非磁性岛。为了以适当的磁化方向磁化Nondata岛，将一个大的磁记录层的矫顽磁场的直流磁场沿一个方向施加到整个磁盘上，以使所有的非磁盘岛在相同的方向上磁化。然后将盘加热到预定温度，并且当盘处于该温度时，小于第一DC磁场的第二DC磁场在与整个盘相反的方向上施加预定时间。这使较小的岛的磁化方向反转，而不会改变较大的岛的磁化。

8. 发明申请

US20140139942A1 MAGNETIC RECORDING DISK DRIVE WITH METHOD FOR RECOVERY OF DATA FROM FAILED DATA SECTORS 有权
标题翻译：磁记录磁盘驱动器，用于从失败的数据部分恢复数据的方法
公开(公告)号：US20140139942A1
公开(公告)日：2014-05-22
申请号：US13680087
申请日：2012-11-18
申请人： HGST NETHERLANDS B.V.
发明人： Michael Konrad Grobis , Kurt Allan Rubin
IPC分类号： G11B20/18
CPC分类号： G11B20/1889 , G11B20/182 , G11B20/1833 , G11B2020/1836 , G11B2020/185 , G11B2220/252
摘要： A magnetic recording disk drive determines the locations of defective bits in a failed data sector, and allows for the error correction code (ECC) to correctly decode the data from the sector. After a sector has failed decoding, the digitized waveform and the read channel state from the failed sector are stored in memory. A nondata pattern is written to the failed sector and read back to determine the locations of the defective data bits in the failed sector, which are then used to update the read channel state. The data pattern from the failed sector, with the identified bit error locations, is attempted to be decoded. If the decoding is successful then the sector is marked as bad and the correctly decoded data pattern is written to a different region of the disk, for example physical sectors specifically intended for use as spare sectors.
摘要翻译：磁记录盘驱动器确定故障数据扇区中的故障位的位置，并允许纠错码（ECC）正确解码扇区中的数据。在扇区解码失败之后，数字波形和来自故障扇区的读通道状态被存储在存储器中。将非数据模式写入故障扇区并读回以确定故障扇区中的有缺陷数据位的位置，然后将其用于更新读通道状态。尝试对来自故障扇区的数据模式与识别的位错误位置进行解码。如果解码成功，则扇区被标记为坏，并且将正确解码的数据模式写入到盘的不同区域，例如专门用作备用扇区的物理扇区。

9. 发明申请

US20140168807A1 TEMPLATED GRANULAR MAGNETIC RECORDING MEDIA 有权
标题翻译：模拟颗粒磁记录介质
公开(公告)号：US20140168807A1
公开(公告)日：2014-06-19
申请号：US13720952
申请日：2012-12-19
申请人： HGST NETHERLANDS B.V.
发明人： Michael Konrad Grobis , Manfred E. Schabes
IPC分类号： G11B27/36 , G11B27/24
CPC分类号： G11B5/855 , G11B5/012 , G11B5/59616 , G11B5/59638 , G11B5/743 , G11B5/82 , G11B2005/0021 , G11B2005/0024
摘要： A system and method for recording data to a perpendicular magnetic recording media having a highly ordered granular structure. The method includes the synchronization of write frequency and write phase to the granular structure of the magnetic media optimize performance of the magnetic data recording system by minimizing bit error rate.
摘要翻译：一种用于将数据记录到具有高度粒度结构的垂直磁记录介质的系统和方法。该方法包括写入频率和写入阶段与磁介质的粒状结构的同步，通过最小化误码率来优化磁数据记录系统的性能。

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