Patents by Inventor Tsu-Hao Chang

Tsu-Hao Chang has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Patent number: 11093146
    Abstract: A method of automatic load rebalancing includes determining that a new storage device was added to a storage array comprising a plurality of storage devices, wherein the new storage device is distinct from the plurality of storage devices. The method further includes, in response to the determining, identifying a first shard on a first storage device of the plurality of storage devices, wherein the first storage device has a fullness metric that is equal to or exceeds a fullness threshold. The method further includes moving, by a processing device of a storage array controller of the storage array, the first shard from the first storage device to the new storage device.
    Type: Grant
    Filed: October 25, 2018
    Date of Patent: August 17, 2021
    Assignee: Pure Storage, Inc.
    Inventors: Ronald Karr, Peter E. Kirkpatrick, Andrew R. Bernat, Tsu-Hao Chang, Phil Hord, Benjamin Scholbrock, Radek Aster
  • Publication number: 20210208783
    Abstract: A system includes a solid-state storage array having a plurality of solid-state storage devices and a storage controller coupled to the solid-state storage array, the storage controller including a processing device, the processing device to select a segment height based on erase block sizes of the plurality of solid-state storage devices. The processing device is further to program a data segment using the segment height to a data stripe across two or more of the plurality of solid-state storage devices and store the segment height in metadata associated with the data segment.
    Type: Application
    Filed: March 18, 2021
    Publication date: July 8, 2021
    Inventors: Andrew R. Bernat, Radek Aster, Benjamin Scholbrock, Conner Haffner, Yunpeng Duan, John Adler, Tsu-Hao Chang
  • Patent number: 10976947
    Abstract: A system includes a solid-state storage array having a plurality of solid-state storage devices and a storage controller coupled to the solid-state storage array, the storage controller including a processing device, the processing device to select a segment height based on erase block sizes of the plurality of solid-state storage devices. The processing device is further to program a data segment using the segment height to a data stripe across two or more of the plurality of solid-state storage devices and store the segment height in metadata associated with the data segment.
    Type: Grant
    Filed: March 15, 2019
    Date of Patent: April 13, 2021
    Assignee: Pure Storage, Inc.
    Inventors: Andrew R. Bernat, Radek Aster, Benjamin Scholbrock, Conner Haffner, Yunpeng Duan, John Adler, Tsu-Hao Chang
  • Publication number: 20200133492
    Abstract: A system includes a solid-state storage array having a plurality of solid-state storage devices and a storage controller coupled to the solid-state storage array, the storage controller including a processing device, the processing device to select a segment height based on erase block sizes of the plurality of solid-state storage devices. The processing device is further to program a data segment using the segment height to a data stripe across two or more of the plurality of solid-state storage devices and store the segment height in metadata associated with the data segment.
    Type: Application
    Filed: March 15, 2019
    Publication date: April 30, 2020
    Inventors: Andrew R. Bernat, Radek Aster, Benjamin Scholbrock, Conner Haffner, Yunpeng Duan, John Adler, Tsu-Hao Chang
  • Patent number: 10515701
    Abstract: A method of using boot-time metadata in a storage system is provided. The method includes writing a fragmentation stride to a solid-state storage device of the storage system, the fragmentation stride defining a granularity on which fragmentation of erase blocks of the solid-state storage device occurs. The method includes allocating portions of erase blocks for at least one process in the storage system, in accordance with the fragmentation stride and writing boot up metadata at offsets that are based on the fragmentation stride, in the solid-state storage device.
    Type: Grant
    Filed: October 31, 2017
    Date of Patent: December 24, 2019
    Assignee: Pure Storage, Inc.
    Inventors: Radek Aster, Andrew R. Bernat, Yunpeng Duan, Benjamin Scholbrock, Tsu-Hao Chang
  • Publication number: 20190065093
    Abstract: A method of automatic load rebalancing includes determining that a new storage device was added to a storage array comprising a plurality of storage devices, wherein the new storage device is distinct from the plurality of storage devices. The method further includes, in response to the determining, identifying a first shard on a first storage device of the plurality of storage devices, wherein the first storage device has a fullness metric that is equal to or exceeds a fullness threshold. The method further includes moving, by a processing device of a storage array controller of the storage array, the first shard from the first storage device to the new storage device.
    Type: Application
    Filed: October 25, 2018
    Publication date: February 28, 2019
    Inventors: Ronald Karr, Peter E. Kirkpatrick, Andrew R. Bernat, Tsu-Hao Chang, Phil Hord, Benjamin Scholbrock, Radek Aster