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    Protecting data in a storage system
    161.
    发明授权
    Protecting data in a storage system 有权

    公开(公告)号：US10887086B1

    公开(公告)日：2021-01-05

    申请号：US16293569

    申请日：2019-03-05

    Applicant: PURE STORAGE, INC.

    Inventor： John Colgrove ,  John Hayes ,  Ethan Miller

    IPC: H04L9/08 ,  G06F21/62

    Abstract: A system, method, and computer-readable storage medium for protecting a set of storage devices using a secret sharing scheme in combination with an external secret. An initial master secret is generated and then transformed into a final master secret using an external secret. A plurality of shares are generated from the initial master secret and distributed to the storage devices. The data of each storage device is encrypted with a device-specific key, and this key is encrypted using the final master secret. In order to read the data on a given storage device, the initial master secret reconstructed from a threshold number of shares and the external secret is retrieved. Next, the initial master secret is transformed into the final master secret using the external secret, and then the final master secret is used to decrypt the encrypted key of a given storage device.

    Dynamically adjusting an amount of protection data stored in a storage system
    165.
    发明授权
    Dynamically adjusting an amount of protection data stored in a storage system 有权

    公开(公告)号：US10452289B1

    公开(公告)日：2019-10-22

    申请号：US15417912

    申请日：2017-01-27

    Applicant: Pure Storage, Inc.

    Inventor： John Colgrove ,  John Hayes ,  Bo Hong ,  Ethan Miller

    IPC: G06F11/10 ,  G06F3/06 ,  G06F11/20

    Abstract: A system and method for adaptive RAID geometries. A computer system comprises client computers and data storage arrays coupled to one another via a network. A data storage array utilizes solid-state drives and Flash memory cells for data storage. A storage controller within a data storage array is configured to determine a first RAID layout for use in storing data, and write a first RAID stripe to the device group according to the first RAID layout. In response to detecting a first condition, the controller is configured to determine a second RAID layout which is different from the first RAID layout, and write a second RAID stripe to the device group according to the second layout, whereby the device group concurrently stores data according to both the first RAID layout and the second RAID layout.

    Rebuilding data across storage nodes
    166.
    发明申请
    Rebuilding data across storage nodes 审中-公开

    公开(公告)号：US20190278656A1

    公开(公告)日：2019-09-12

    申请号：US16422755

    申请日：2019-05-24

    Applicant: Pure Storage, Inc.

    Inventor： John Hayes ,  John Colgrove ,  Robert Lee ,  Joshua Robinson ,  Igor Ostrovsky

    IPC: G06F11/10

    Abstract: A method for proactively rebuilding user data in a plurality of storage nodes of a storage cluster is provided. The method includes distributing user data and metadata throughout the plurality of storage nodes such that the plurality of storage nodes can read the user data, using erasure coding, despite loss of two of the storage nodes. The method includes determining that one of the storage nodes is unreachable and determining to rebuild the user data for the one of the storage nodes that is unreachable. The method includes reading the user data across a remainder of the plurality of storage nodes, using the erasure coding and writing the user data across the remainder of the plurality of storage nodes, using the erasure coding. A plurality of storage nodes within a single chassis that can proactively rebuild the user data stored within the storage nodes is also provided.

    Restoring snapshots in a storage system
    167.
    发明授权
    Restoring snapshots in a storage system 有权

    公开(公告)号：US10235093B1

    公开(公告)日：2019-03-19

    申请号：US15484243

    申请日：2017-04-11

    Applicant: Pure Storage, Inc.

    Inventor： John Colgrove ,  Ethan Miller ,  John Hayes ,  Cary Sandvig ,  Christopher Golden ,  Jianting Cao

    IPC: G06F3/06

    Abstract: A system and method for creating and managing snapshots. Mediums are recorded and maintained, all of which are read-only except for the most recent mediums in use by a volume. Multiple volumes may be maintained, including a first volume which points to a first medium. When a snapshot of the first volume is taken, a second medium is created that points to the first medium. The first volume is also updated to point to the second medium. The first medium becomes the underlying medium of the second medium, and lookups are performed initially on the second medium and then on the first medium if the data is not located in the second medium.

    Inter-device and intra-device protection data
    168.
    发明授权
    Inter-device and intra-device protection data 有权

    公开(公告)号：US10180879B1

    公开(公告)日：2019-01-15

    申请号：US14967848

    申请日：2015-12-14

    Applicant: Pure Storage, Inc.

    Inventor： John Colgrove ,  John Hayes ,  Bo Hong ,  Ethan Miller

    IPC: G06F11/00 ,  G06F11/10 ,  G06F3/06

    Abstract: A system and method for offset protection data in a RAID array. A computer system comprises client computers and data storage arrays coupled to one another via a network. A data storage array utilizes solid-state drives and Flash memory cells for data storage. A storage controller within a data storage array is configured to store user data in a first page of a first storage device of the plurality of storage devices; generate intra-device protection data corresponding to the user data, and store the intra-device protection data at a first offset within the first page. The controller is further configured to generate inter-device protection data corresponding to the first page, and store the inter-device protection data at a second offset within a second page in a second storage device of the plurality of storage devices, wherein the first offset is different from the second offset.

    Identifying fractal regions across multiple storage devices
    169.
    发明授权
    Identifying fractal regions across multiple storage devices 有权

    公开(公告)号：US10089010B1

    公开(公告)日：2018-10-02

    申请号：US15682759

    申请日：2017-08-22

    Applicant: Pure Storage, Inc.

    Inventor： Ethan Miller ,  John Colgrove ,  John Hayes ,  Cary Sandvig

    IPC: G06F12/00 ,  G06F3/06 ,  G06F12/1009

    Abstract: A system, method, and computer-readable storage medium for mapping block numbers within a region to physical locations within a storage system. Block numbers are mapped within a region according to a fractal-based space-filling curve. If the region is not a 2k by 2k square, then the region is broken up into one or more 2k by 2k squares. Any remaining sub-region is centered within a 2k by 2k square, the 2k by 2k square is numbered using a fractal-based space-filling curve, and then the sub-region is renumbered by assigning numbers based on the order of the original block numbers of the sub-region.

    SEPARATE ENCRYPTION FOR A SOLID-STATE DRIVE
    170.
    发明申请
    SEPARATE ENCRYPTION FOR A SOLID-STATE DRIVE 审中-公开

    公开(公告)号：US20180219675A1

    公开(公告)日：2018-08-02

    申请号：US15421218

    申请日：2017-01-31

    Applicant: Pure Storage, Inc.

    Inventor： John Colgrove ,  Peter E. Kirkpatrick ,  Robert Lee ,  Ethan L. Miller

    IPC: H04L9/14 ,  G06F21/60

    CPC classification number: H04L9/14 ,  G06F21/602 ,  G06F21/79 ,  G06F2221/2143

    Abstract: A method of operating a solid-state storage drive is provided. The method includes encrypting, in the solid-state storage drive, first data by a first key, and writing the encrypted first data into solid-state storage memory of the solid-state storage drive. The method includes encrypting, in the solid-state storage drive, second data by a second key, and writing the encrypted second data into the solid-state storage memory of the solid-state storage drive, wherein at least one of the first key or the second key is supplied from a source external to the solid-state storage drive.

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