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    Systems and Methods to Maintain Consistent High Availability and Performance in Storage Area Networks
    1.
    发明申请
    Systems and Methods to Maintain Consistent High Availability and Performance in Storage Area Networks 审中-公开

    公开(公告)号：US20170220249A1

    公开(公告)日：2017-08-03

    申请号：US15011050

    申请日：2016-01-29

    Applicant: NetApp, Inc.

    Inventor： Mahmoud K. Jibbe ,  Jeff Hudson ,  Joseph Blount ,  Keith Holt

    IPC: G06F3/06 ,  G06F12/08

    CPC classification number: G06F12/0806 ,  G06F11/0727 ,  G06F11/1076 ,  G06F11/20 ,  G06F2212/621

    Abstract: Embodiments of the present disclosure enable high availability and performance in view of storage controller failure. A storage system includes three or more controllers that may be distributed in a plurality of enclosures. The controllers are in high availability pairs on a per volume basis, with volumes and corresponding mirror targets distributed throughout the storage system. When a controller fails, other controllers in the system detect the failure and assess whether one or more volumes and/or mirror targets are affected. If no volumes/mirror targets are affected, then write-back caching continues. If volume ownership is affected, then a new volume owner is selected so that write-back caching may continue. If mirror target ownership is affected, then a new mirror target is selected so that write-back caching may continue. As a result, write-back caching availability is increased to provide low latency and high throughput in degraded mode as in other modes.

    Recovering unreadable data for a vaulted volume
    2.
    发明授权
    Recovering unreadable data for a vaulted volume 有权

    公开(公告)号：US10216597B2

    公开(公告)日：2019-02-26

    申请号：US15142659

    申请日：2016-04-29

    Applicant: NetApp, Inc.

    Inventor： Mahmoud K. Jibbe ,  Keith Holt

    IPC: G06F11/14 ,  G06F11/20

    Abstract: A method, a computing device, and a non-transitory machine-readable medium for replacing an unreadable sector in a storage system is provided. In some embodiments, the method includes identifying a sector from a plurality of sectors in a physical memory of a storage device in a storage system as an unreadable sector. An unreadable sector is a sector that includes data that had been corrupted and cannot be recovered from data in the storage system. In some embodiments, the unreadable sector is recovered by receiving a copy of a sector identified as the unreadable sector from a cloud storage, where the copy of the sector stores readable data and the cloud storage is a separate storage from the storage system. The method then includes replacing the unreadable sector with the copy at the sector at a memory location in the physical memory occupied by the unreadable sector.

    Recovering Unreadable Data For A Vaulted Volume
    4.
    发明申请
    Recovering Unreadable Data For A Vaulted Volume 审中-公开

    公开(公告)号：US20170315890A1

    公开(公告)日：2017-11-02

    申请号：US15142659

    申请日：2016-04-29

    Applicant: NetApp, Inc.

    Inventor： Mahmoud K. Jibbe ,  Keith Holt

    IPC: G06F11/20 ,  G06F3/06

    CPC classification number: G06F11/2094 ,  G06F11/1076 ,  G06F11/1469 ,  G06F11/16 ,  G06F2201/805

    Abstract: A method, a computing device, and a non-transitory machine-readable medium for replacing an unreadable sector in a storage system is provided. In some embodiments, the method includes identifying a sector from a plurality of sectors in a physical memory of a storage device in a storage system as an unreadable sector. An unreadable sector is a sector that includes data that had been corrupted and cannot be recovered from data in the storage system. In some embodiments, the unreadable sector is recovered by receiving a copy of a sector identified as the unreadable sector from a cloud storage, where the copy of the sector stores readable data and the cloud storage is a separate storage from the storage system. The method then includes replacing the unreadable sector with the copy at the sector at a memory location in the physical memory occupied by the unreadable sector.

    Managing input/output operations for shingled magnetic recording in a storage system
    5.
    发明授权
    Managing input/output operations for shingled magnetic recording in a storage system 有权

    公开(公告)号：US10521345B2

    公开(公告)日：2019-12-31

    申请号：US16113719

    申请日：2018-08-27

    Applicant: NetApp, Inc.

    Inventor： Mahmoud K Jibbe ,  Keith Holt ,  Scott Terrill

    IPC: G06F3/06 ,  G06F12/0802 ,  G11B5/012 ,  G06F12/10 ,  G11B20/10

    Abstract: A system and method for improving the management of data input and output (I/O) operations for Shingled Magnetic Recording (SMR) devices in a network storage system is disclosed. The storage system includes a storage controller that receives a series of write requests for data blocks to be written to non-sequential addresses within a pool of SMR devices. The storage controller writes the data blocks from the series of write requests to a corresponding sequence of data clusters allocated within a first data cache of the storage controller for a thinly provisioned volume of the pool of SMR devices. Upon determining that a current utilization of the first data cache's data storage capacity exceeds a threshold, the sequence of data clusters including the data blocks from the first data cache are transferred to sequential physical addresses within the SMR devices.

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