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公开(公告)号：US11977445B2
公开(公告)日：2024-05-07
申请号：US17590129
申请日：2022-02-01
Applicant: Seagate Technology LLC
Inventor： Ara Patapoutian , Ryan McCallister , Ian Davies
CPC classification number: G06F11/1076
Abstract: A method includes detecting, by a first data storage device, an error when reading data from the first data storage device. The method further includes correcting a portion of the error, by a controller of a host system, using host-level outer codes; and communicating, by the controller, error correction information to the first data storage device in response to correcting the portion of the error using the host-level outer codes.
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公开(公告)号：US11960767B2
公开(公告)日：2024-04-16
申请号：US17689386
申请日：2022-03-08
Applicant: Seagate Technology LLC
Inventor： Ryan P. McCallister , Ara Patapoutian , Mark A. Gaertner , Ian Davies
CPC classification number: G06F3/0659 , G06F3/0604 , G06F3/0619 , G06F3/0635 , G06F3/0689 , H03M13/1515
Abstract: A method includes receiving, by a data storage device, a read command. The method further includes reading a first set of outer code stored to a magnetic recording medium of the data storage device and storing the first set of outer code to memory. The method further includes receiving a write command to write data to the magnetic recording medium and writing a second set of outer code to the magnetic recording medium in connection with the write command.
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公开(公告)号：US20230289095A1
公开(公告)日：2023-09-14
申请号：US17689386
申请日：2022-03-08
Applicant: Seagate Technology LLC
Inventor： RYAN P. McCALLISTER , Ara Patapoutian , Mark A. Gaertner , Ian Davies
CPC classification number: G06F3/0659 , G06F3/0635 , G06F3/0619 , G06F3/0604 , G06F3/0689 , H03M13/1515
Abstract: A method includes receiving, by a data storage device, a read command. The method further includes reading a first set of outer code stored to a magnetic recording medium of the data storage device and storing the first set of outer code to memory. The method further includes receiving a write command to write data to the magnetic recording medium and writing a second set of outer code to the magnetic recording medium in connection with the write command.
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公开(公告)号：US11314433B1
公开(公告)日：2022-04-26
申请号：US17100480
申请日：2020-11-20
Applicant: Seagate Technology LLC
Inventor： Michael Barrell , Ian Davies
IPC: G06F12/00 , G06F3/06 , G06F9/50 , G06F16/901 , G06F11/14
Abstract: Use of a deduplication module remote from a storage system for storage of data subject to deduplication by the remote deduplication module. The storage system may generate a hash of target data and send the hash of the target data to the remote deduplication module. The remote deduplication module may access a hash database corresponding to the storage system and apply a deduplication algorithm on the hash. In turn, information regarding a deduplication result may be returned to the storage system which may either store the unique target data or update a mapping between the target data and duplicate existing data in a persistent storage of the storage device. The remote deduplication module may be executed by scalable cloud resources such that the computational resources dedicated to the deduplication module may be scaled.
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公开(公告)号：US10706082B1
公开(公告)日：2020-07-07
申请号：US15638310
申请日：2017-06-29
Applicant: Seagate Technology LLC
Inventor： Michael Barrell , Ian Davies , Kenneth F Day, III , Douglas Dewey
IPC: G06F16/31 , G06F16/174
Abstract: An apparatus may include a controller configured search a hash database storing entries corresponding to hash values of previously stored data to find a hash page of the hash database corresponding to a range of hash values including the first hash value. When the hash page is found, the controller may be configured to determine whether the hash page does not include an entry for the first hash value, the first hash page further including a base hash value for the range of hash values. When the hash page does not include an entry for the first hash value, the controller may be configured to generate a first entry of the first hash page for the first hash value, the first entry including an offset value from the base hash value corresponding to the first hash value and a data location at which the received data is to be stored.
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Patent Agency Ranking
16.发明授权公开(公告)号：US11379150B2
公开(公告)日：2022-07-05
申请号：US16777988
申请日：2020-01-31
Applicant: Seagate Technology LLC
Inventor： John Michael Bent , Ian Davies , Mohamad El-Batal , Ujjwal Lanjewar
Abstract: Each disk drive in an array includes a housing that encloses a motor and at least one magnetic disk. The housing also encloses first and second actuators each with respective first and second heads that independently access the magnetic disk. The first actuator is mapped to a first logical unit and the second actuator is mapped to a second logical unit. A host interface of each disk drive facilitates access to the first and second logical units. A system includes a first storage controller attached to all of the first logical units as a first active server and attached to all of the second logical units as a first passive server. A second storage controller operates redundantly with the first storage controller. The second storage controller is attached to all of the second logical units as a second active server and attached to all of the first logical units as a second passive server.
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17.发明申请公开(公告)号：US20210240386A1
公开(公告)日：2021-08-05
申请号：US16777988
申请日：2020-01-31
Applicant: Seagate Technology LLC
Inventor： John Michael Bent , Ian Davies , Mohamad El-Batal , Ujjwal Lanjewar
Abstract: Each disk drive in an array includes a housing that encloses a motor and at least one magnetic disk. The housing also encloses first and second actuators each with respective first and second heads that independently access the magnetic disk. The first actuator is mapped to a first logical unit and the second actuator is mapped to a second logical unit. A host interface of each disk drive facilitates access to the first and second logical units. A system includes a first storage controller attached to all of the first logical units as a first active server and attached to all of the second logical units as a first passive server. A second storage controller operates redundantly with the first storage controller. The second storage controller is attached to all of the second logical units as a second active server and attached to all of the first logical units as a second passive server.
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公开(公告)号：US10990474B1
公开(公告)日：2021-04-27
申请号：US16811790
申请日：2020-03-06
Applicant: Seagate Technology LLC
Inventor： John Bent , Kenneth K. Claffey , Ian Davies , Peter Maddocks
Abstract: A method includes, upon a read operation for a stripe of a storage device, determining a percentage amount of potential read amplification for the read operation. A current age of the stripe in the read operation is determined as a percentage of a longest safe elapsed time between read scrub operations on a stripe of the storage device. A read scrub operation is performed on the stripe when the current age is greater than the percentage amount of potential read amplification.
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公开(公告)号：US20200125447A1
公开(公告)日：2020-04-23
申请号：US16166936
申请日：2018-10-22
Applicant: Seagate Technology LLC
Inventor： Kushal R. Hosmani , Thomas George Wicklund , Ian Davies , Ryan Patrick McCallister
Abstract: Apparatus and method for managing data in a multi-device storage system, such as a RAID (redundant array of independent discs) system. Distributed data sets are stored across a plurality of storage devices. A selected storage device is replaced with a new storage device responsive to an anomalous event. A rebuild operation is performed to reconstruct data from the selected storage device to the new storage device. The rebuild process includes accessing a list of distributed data sets in a local memory. For each distributed data set in the list identified as constituting valid data, read commands are issued to the remaining storage devices and a write command is issued to the new storage device. For each distributed data set in the list identified as constituting unused data, a data clear command is issued to each of the remaining storage devices and to the new storage device.
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公开(公告)号：US10409682B1
公开(公告)日：2019-09-10
申请号：US15441697
申请日：2017-02-24
Applicant: Seagate Technology LLC
Inventor： Ian Davies , Ruiling Luo , Thomas George Wicklund , Kenneth F. Day , Douglas William Dewey
Abstract: The technology disclosed herein includes a method for dividing a body of user data into a plurality of data blocks, and writing the plurality of data blocks into chunk zones in parallel streams, the chunk zones located in a first ordered pool of storage devices. In some implementations, the method includes adding additional storage devices to the first ordered pool making a second ordered pool, including the first ordered pool, and writing the plurality of data blocks across the second ordered pool of storage devices, such that each of the storage devices including spare capacity. The method includes determining if a storage device fails, and seeking data for the data blocks on the failed storage device from of the other storage devices.
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