公开(公告)号：US20200089614A1

公开(公告)日：2020-03-19

申请号：US16130082

申请日：2018-09-13

Applicant: Seagate Technology LLC

Inventor： Chee Hou Peng ,  Mun Kai Lye ,  WenXiang Xie ,  Vincent Uy

IPC: G06F12/0891 ,  G06F12/0888 ,  G06F12/0868

Abstract: A method writing data received from a host device includes determining whether command data of a write command includes metadata, flushing the command data out of a volatile write cache according to a first caching policy responsive to a determination that the command data does includes metadata, and flushing the command data out of the volatile write cache according to a second different caching policy responsive to a determination that the command data does not include metadata.

公开(公告)号：US10579533B2

公开(公告)日：2020-03-03

申请号：US15719957

申请日：2017-09-29

Applicant: Seagate Technology LLC

Inventor： Andrew Michael Kowles ,  Xiong Liu ,  Mark Gaertner ,  Kai Yang ,  WenXiang Xie ,  Jiangnan Lin

IPC: G06F3/06 ,  G06F12/0871 ,  G06F12/0875 ,  G06F12/0811

Abstract: In accordance with one implementation, a method for mitigating cache transfer time entails reading data into memory from at least two consecutive elliptical data tracks in a main store region of data storage and writing the data read from the at least two consecutive elliptical data tracks to a spiral data track within a cache storage region.

公开(公告)号：US10223272B2

公开(公告)日：2019-03-05

申请号：US15496761

申请日：2017-04-25

Applicant: Seagate Technology, LLC

Inventor： Jian Qiang ,  Harry Tiotantra ,  Kai Chen ,  WenXiang Xie ,  Andrew Michael Kowles

IPC: G06F12/0868 ,  G06F17/30 ,  G06F16/901

Abstract: Apparatus and method for managing metadata in a data storage device. In some embodiments, a metadata object has entries that describe data sets stored in a non-volatile write cache. During an archival (persistence) operation, the metadata object is divided into portions, and the portions are copied in turn to a non-volatile memory at a rate that maintains a measured latency within a predetermined threshold. A journal is formed of time-ordered entries that describe changes to the metadata object after the copying of the associated portions to the non-volatile memory. The journal is subsequently stored to the non-volatile memory, and may be subsequently combined with the previously stored portions to recreate the metadata object in a local memory. The measured performance latency may be related to a specified customer command completion time (CCT) for host commands.

公开(公告)号：US20180307609A1

公开(公告)日：2018-10-25

申请号：US15496761

申请日：2017-04-25

Applicant: Seagate Technology, LLC

Inventor： Jian Qiang ,  Harry Tiotantra ,  Kai Chen ,  WenXiang Xie ,  Andrew Michael Kowles

IPC: G06F12/0868 ,  G06F17/30

CPC classification number: G06F12/0868 ,  G06F17/30961 ,  G06F2212/1024 ,  G06F2212/281

Abstract: Apparatus and method for managing metadata in a data storage device. In some embodiments, a metadata object has entries that describe data sets stored in a non-volatile write cache. During an archival (persistence) operation, the metadata object is divided into portions, and the portions are copied in turn to a non-volatile memory at a rate that maintains a measured latency within a predetermined threshold. A journal is formed of time-ordered entries that describe changes to the metadata object after the copying of the associated portions to the non-volatile memory. The journal is subsequently stored to the non-volatile memory, and may be subsequently combined with the previously stored portions to recreate the metadata object in a local memory. The measured performance latency may be related to a specified customer command completion time (CCT) for host commands.

公开(公告)号：US09971645B2

公开(公告)日：2018-05-15

申请号：US15244113

申请日：2016-08-23

Applicant: Seagate Technology LLC

Inventor： Jian Qiang ,  WenXiang Xie ,  Thein Than Zaw ,  Brian T. Edgar

IPC: G06F11/00 ,  G06F11/10 ,  G06F3/06 ,  G06F12/128 ,  G06F11/14 ,  G06F11/16 ,  G06F11/20

CPC classification number: G06F11/1064 ,  G06F3/0619 ,  G06F3/065 ,  G06F3/0655 ,  G06F3/0688 ,  G06F11/1451 ,  G06F11/1458 ,  G06F11/1469 ,  G06F11/1662 ,  G06F11/2064 ,  G06F12/128 ,  G06F2201/84 ,  G06F2212/69 ,  G06F2212/70

Abstract: Apparatus and method for managing a media cache of a data storage device. In some embodiments, a media cache master table is maintained in a memory as a data structure having a plurality of entries that describe data sets stored in a non-volatile media cache memory. A first timecode stamp value is written to respective first and second locations in the table at the commencement of a data transfer operation to transfer data associated with the plurality of entries in the table. The first location is updated with a new, second timecode stamp value responsive to detection of an error condition that interrupts the data transfer operation. An error recovery operation is subsequently performed responsive to a detected mismatch between the timecode stamp values in the first and second locations.

公开(公告)号：US20160034342A1

公开(公告)日：2016-02-04

申请号：US14447202

申请日：2014-07-30

Applicant: Seagate Technology LLC

Inventor： Michael JC Toh ,  WenXiang Xie ,  Xiong Liu ,  Timothy Richard Feldman ,  Paul Michael Wiggins ,  Gregory Paul Moller

IPC: G06F11/10 ,  G06F12/08 ,  G11C29/50 ,  G06F12/02

CPC classification number: G06F11/1044 ,  G06F11/1012 ,  G06F11/1064 ,  G06F11/1072 ,  G06F12/0246 ,  G06F12/0875 ,  G06F2212/2228 ,  G06F2212/7211

Abstract: Apparatus and method for managing a media cache through the monitoring of operational vibration of a data storage device. In some embodiments, a non-volatile media cache of the data storage device is partitioned into at least first and second zones having different data recording characteristics. Input data are received for storage in a non-volatile main memory of the data storage device. An amount of operational vibration associated with the data storage device is measured. The input data are stored in a selected one of the first or second zones of the media cache prior to transfer to the main memory responsive to a comparison of the measured amount of operational vibration to a predetermined operational vibration threshold.

Abstract translation: 通过监视数据存储装置的操作振动来管理媒体缓存的装置和方法。 在一些实施例中，数据存储设备的非易失性介质缓存被分割成具有不同数据记录特性的至少第一和第二区域。 接收输入数据以存储在数据存储装置的非易失性主存储器中。 测量与数据存储装置相关联的操作振动量。 响应于所测量的操作振动量与预定操作振动阈值的比较，输入数据在传送到主存储器之前存储在媒体高速缓存的所选第一或第二区中的所选择的一个中。

公开(公告)号：US09007710B1

公开(公告)日：2015-04-14

申请号：US14470340

申请日：2014-08-27

Applicant: Seagate Technology LLC

Inventor： Xiong Liu ,  Brian T Edgar ,  Feng Shen ,  WenXiang Xie ,  ThanZaw Thein

IPC: G11B5/09 ,  G11B20/12 ,  G11B20/10

CPC classification number: G06F3/061 ,  G06F3/0655 ,  G06F3/0677 ,  G06F3/0679 ,  G06F2206/1014 ,  G11B20/10527 ,  G11B20/1217 ,  G11B2020/1238

Abstract: Systems and methods are disclosed for performing a rewrite operation on recording bands of a data storage medium. In some embodiments, data may be read from a target band including a plurality of tracks, and modified. A portion less than all of the modified data is stored to a nonvolatile memory, and all of the modified data is written to the target band. In some embodiments, modified data corresponding to the first two tracks of the target band is stored to the nonvolatile memory, and modified data corresponding to the third track of the target band is written back to the first physical track. Each track may be written in order, ending with the modified data corresponding to the first two tracks. The result may be that data for each track in the band has shifted up two tracks, with data for the first two tracks moved to the end.

Abstract translation: 公开了用于对数据存储介质的记录带进行重写操作的系统和方法。 在一些实施例中，可以从包括多个轨道的目标频带读取数据并进行修改。 小于所有修改数据的部分被存储到非易失性存储器中，并且将所有修改的数据写入目标频带。 在一些实施例中，对应于目标频带的前两个磁道的修改数据被存储到非易失性存储器，并且对应于目标频带的第三磁道的修改数据被写回到第一物理磁道。 可以按顺序写入每个轨道，以对应于前两个轨道的修改数据结束。 结果可能是频带中的每个轨道的数据已经向上移动两个轨道，其中前两个轨道的数据移动到最后。