公开(公告)号：US10733097B2

公开(公告)日：2020-08-04

申请号：US15910750

申请日：2018-03-02

Applicant: Seagate Technology LLC

Inventor： Jian Qiang ,  Sze Chek Tan

IPC: G06F12/0804 ,  G06F12/0866 ,  G11B20/12 ,  G11B20/18 ,  G11B19/04 ,  G06F12/0875

Abstract: The disclosed technology provides a method that reduces time to recover in storage systems. In one implementation, the method comprises entering an idle status, determining if there is an incomplete band update operation, invalidating a media scratch pad (MSP) by clearing headers responsive to determining there is no incomplete band update operation, performing a power cycle, reading an MSP header, and determining if an MSP header is valid. If a rude power cycle occurs and the MSP header is determined to be valid, an MSP is examined, and restored if required. If a safe power cycle occurs, an MSP restore operation is not required, reducing time to recover.

公开(公告)号：US09817579B2

公开(公告)日：2017-11-14

申请号：US14859118

申请日：2015-09-18

Applicant: SEAGATE TECHNOLOGY LLC

Inventor： Xiong Liu ,  Wenxiang Xie ,  Sze Chek Tan ,  Feng Shen

IPC: G11B20/12 ,  G06F3/06 ,  G06F12/0868

CPC classification number: G06F3/0608 ,  G06F3/0656 ,  G06F3/0658 ,  G06F3/0676 ,  G06F3/068 ,  G06F12/0868 ,  G06F2212/1044 ,  G06F2212/217 ,  G06F2212/281 ,  G06F2212/313 ,  G06F2212/46 ,  G06F2212/70 ,  G11B20/10527 ,  G11B20/1217 ,  G11B20/1252 ,  G11B2020/10657 ,  G11B2020/1238 ,  G11B2020/1278 ,  G11B2020/1292

Abstract: Systems and methods for maximizing shingled magnetic recording (SMR) drive capacity are described. In one embodiment, the SMR drive may include a main store to store user-accessible data, a media cache and media scratchpad to store internal data temporarily for internal operations, and a storage controller to process read and write requests. In some cases, the main store comprises a shingled media partition and an unshingled media partition. The storage controller may designate one or more data tracks from the shingled media partition as temporary data track guard bands. In some embodiments, a track range is selected based at least in part on at least one of an amount of data in the media cache, a size of the new data in the media cache, and an association between the new data in the media cache and data currently stored within the selected track range.

公开(公告)号：US10108343B2

公开(公告)日：2018-10-23

申请号：US15730916

申请日：2017-10-12

Applicant: SEAGATE TECHNOLOGY LLC

Inventor： Xiong Liu ,  Wenxiang Xie ,  Sze Chek Tan ,  Feng Shen

IPC: G11B20/10 ,  G06F3/06 ,  G06F12/0868 ,  G11B20/12

Abstract: Systems and methods for maximizing shingled magnetic recording (SMR) drive capacity are described. In one embodiment, the SMR drive may include a main store to store user-accessible data, a media cache and media scratchpad to store internal data temporarily for internal operations, and a storage controller to process read and write requests. In some cases, the main store comprises a shingled media partition and an unshingled media partition. The storage controller may designate one or more data tracks from the shingled media partition as temporary data track guard bands. In some embodiments, a track range is selected based at least in part on at least one of an amount of data in the media cache, a size of the new data in the media cache, and an association between the new data in the media cache and data currently stored within the selected track range.

公开(公告)号：US20180314636A1

公开(公告)日：2018-11-01

申请号：US15910750

申请日：2018-03-02

Applicant: Seagate Technology LLC

Inventor： Jian Qiang ,  Sze Chek Tan

IPC: G06F12/0804 ,  G06F12/0866 ,  G11B20/12

CPC classification number: G06F12/0804 ,  G06F12/0866 ,  G06F12/0875 ,  G06F2212/1032 ,  G06F2212/21 ,  G06F2212/281 ,  G06F2212/313 ,  G06F2212/462 ,  G11B19/04 ,  G11B20/1217 ,  G11B20/1816 ,  G11B2020/1238 ,  G11B2020/1292

Abstract: The disclosed technology provides a method that reduces time to recover in storage systems. In one implementation, the method comprises entering an idle status, determining if there is an incomplete band update operation, invalidating a media scratch pad (MSP) by clearing headers responsive to determining there is no incomplete band update operation, performing a power cycle, reading an MSP header, and determining if an MSP header is valid. If a rude power cycle occurs and the MSP header is determined to be valid, an MSP is examined, and restored if required. If a safe power cycle occurs, an MSP restore operation is not required, reducing time to recover.