Patents by Inventor Douglas E. LeCrone

Douglas E. LeCrone 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).

  • Publication number: 20220137822
    Abstract: Accessing additional storage space of a storage system includes reading a physical data fragment that is an incremental subset of a physical storage unit of the storage system, accessing metadata corresponding to logical blocks stored on the physical data fragment to determine a sidebar storage portion of the physical data fragment that is unused by the logical blocks, and accessing data of the sidebar storage portion. Accessing data of the sidebar storage portion may include providing data from the sidebar storage portion to a calling process. Accessing data of the sidebar storage portion may include modifying a portion of data from the physical data fragment and writing the physical data fragment back to the physical storage device. The physical data fragment may be locked prior to reading the physical data fragment and the physical data fragment may be unlocked after writing the physical data fragment.
    Type: Application
    Filed: October 29, 2020
    Publication date: May 5, 2022
    Applicant: EMC IP Holding Company LLC
    Inventors: Douglas E. LeCrone, Jeremy J. O'Hare, Paul A. Linstead
  • Publication number: 20220137828
    Abstract: Transforming data that is provided by a first instance of an application that uses application-instance specific data includes determining if a component of the data is an application-instance specific component and, if the component is an application-instance specific component, transforming the component either at a storage system containing the data or as the component is being accessed by a second instance of the application, different from the first instance. Transforming the component at a storage system containing the data may be performed independently of any accesses of the data. Transforming the component at a storage system containing the data may be performed by the storage system. The first instance of the application may run on a first host and the second instance of the application may run on a second host different from the first host. The first and second instances of the application may run on a same host.
    Type: Application
    Filed: October 29, 2020
    Publication date: May 5, 2022
    Applicant: EMC IP Holding Company LLC
    Inventors: Brett A. Quinn, Douglas E. LeCrone
  • Publication number: 20220138149
    Abstract: Creating point-in-time versions of files for applications at a storage system includes maintaining at the storage system a data structure correlating each of a plurality of applications with files for each of the applications and correlating each of the files with portions of the data storage system, using the data structure to determine specific files for a particular one of the applications for which a point-in-time version is being created, using the data structure to determine specific portions of the storage system corresponding to the specific files, suspending writes to the specific portions, completing previous writes to the specific portions following suspending writes, and performing a snapshot of the specific files following completing previous writes. The portions of the data storage may be extents. A host may provide information to the storage system to correlate applications with files and to correlate files with portions of the data storage system.
    Type: Application
    Filed: October 29, 2020
    Publication date: May 5, 2022
    Applicant: EMC IP Holding Company LLC
    Inventors: Brett A. Quinn, Douglas E. LeCrone
  • Publication number: 20220100393
    Abstract: Directly writing snapshot data for a volume on a storage system to an external storage includes receiving a write of new data to a portion of the storage system, forming encapsulated data by encapsulating either the new data or data at the portion of the storage system in a format that is native to the storage system, and directly writing the encapsulated data to the external storage. The external storage may be cloud storage or may be a tape emulation unit. The data at the portion of the storage system may be encapsulated prior to writing the new data to the storage system. The new data may be encapsulated. Prior to receiving a write of the new data, a full backup may be performed from the storage system to the external storage. The encapsulated data may provide an incremental backup for the full backup.
    Type: Application
    Filed: September 29, 2020
    Publication date: March 31, 2022
    Applicant: EMC IP Holding Company LLC
    Inventors: Brett A. Quinn, Paul A. Linstead, Douglas E. LeCrone
  • Publication number: 20220100620
    Abstract: Transitioning from using a donor four site replication system to using a target four site replication system includes initiating synchronization between a first local storage system of the donor four site replication system that receives I/O from a host with an alternative first local storage system of the target four site replication system, the host switching to automatically fail over to a synchronous storage system of the target four site replication system that receives synchronous data from the alternative first local storage system following synchronizing the first local storage system with the alternative first local storage system, and the host switching to perform I/O operations with the alternative first local storage system following switching to automatically fail over to the synchronous storage system. The host may run the z/OS operating system. The host may automatically fail over to a storage system by switching subchannel sets.
    Type: Application
    Filed: September 29, 2020
    Publication date: March 31, 2022
    Applicant: EMC IP Holding Company LLC
    Inventors: Brett A. Quinn, Paul A. Linstead, Douglas E. LeCrone
  • Patent number: 11288131
    Abstract: Extending snapshot retention for a storage system includes creating a plurality of entries, each of the entries corresponding to snapshot data on the storage system and containing data that was written in connection with the snapshot and containing a map indicating which portions of the storage system were modified and includes transferring the entries to an external storage that is separate from the storage system. The map may be an SDDF map that indicates tracks of data that were modified. The external storage may be a cloud storage. Each of the entries may be created prior to deleting data for a corresponding snapshot on the storage system. The entries may be transferred directly from the storage system to the external storage. Extending snapshot retention for a storage system may also include periodically writing a full version of data from the storage device to the external storage.
    Type: Grant
    Filed: February 27, 2020
    Date of Patent: March 29, 2022
    Assignee: EMC IP Holding Company LLC
    Inventors: Douglas E. LeCrone, Brett A. Quinn
  • Patent number: 11262952
    Abstract: Writing new data to a tape volume of a tape emulation unit includes determining if the new data is an update to data that was previously written, writing the new data to a new section of the tape emulation unit in response to the new data not updating data that was previously written, deleting the data that was previously written and writing the new data to a new section in response to the new data updating data that was previously written, the new data being larger than the data that was previously written, and the underlying file system not supporting variable size records/blocks, and overwriting the data that was previously written in response to the new data updating data that was previously written and either the new data not being larger than the data that was previously written or the underlying file system supporting variable size records/blocks.
    Type: Grant
    Filed: July 19, 2019
    Date of Patent: March 1, 2022
    Assignee: EMC IP Holding Company LLC
    Inventors: Douglas E. LeCrone, Larry McCloskey, Richard Goodwill, Martin Feeney
  • Patent number: 11265374
    Abstract: Maintaining versions of data from a storage system includes detecting that a snapshot of the data has been performed at the storage device, transferring a previous version of the data to a cloud storage, and prohibiting deletion of the snapshot until the previous version of the data has been completely transferred to the cloud storage. The data may be a volume on the storage system. The cloud storage may be public cloud storage or part of a private network. The cloud storage may be accessible from any location via the World Wide Web. A connection between the storage device and the cloud storage may be provided by the Internet, a TCP/IP network, a dedicated connection, or a FICON connection. The snapshot may store a log entry in a log device corresponding to a particular point-in-time version of the data prior to data being written to the storage device.
    Type: Grant
    Filed: October 15, 2019
    Date of Patent: March 1, 2022
    Assignee: EMC IP Holding Company LLC
    Inventors: Douglas E. LeCrone, Brett A. Quinn
  • Patent number: 11237921
    Abstract: Changing operational backup parameters on a storage system includes a first actor generating a request to change operational backup parameters, providing the request from the first actor to a second actor, the second actor authorizing the request, and modifying the operational backup parameters in response to the second actor authorizing the request. The first actor may be assigned a role that allows the first actor to generate the request to change operational backup parameters of the storage system and the second actor may be assigned a role that allows the second actor to authorize the request to change operational backup parameters of the storage system. The request may include a time window provided by the first actor. Authorizing a request to change operational backup parameters of the storage system may create a token and an authorization key. The token may be indicative of the request provided by the first actor.
    Type: Grant
    Filed: November 22, 2019
    Date of Patent: February 1, 2022
    Assignee: EMC IP Holding Company LLC
    Inventors: Douglas E. LeCrone, Paul A. Linstead, Brett A. Quinn, Denis J. Burt
  • Patent number: 11226756
    Abstract: Transferring data between a first storage device coupled to a host computing system and a second storage device coupled to the first storage device includes the first storage device receiving a command from the host computing system, the first storage device determining if the command is an out-of-band (OOB) storage command, and, if the command is an OOB storage command, the first storage device sending a command to the second storage device to cause data to be transferred directly between the first storage device and the second storage device independent of the host computing system. Transferring data between a first storage device coupled to a host computing system and a second storage device coupled to the first storage device may also include the first storage device emulating a host computing system in connection with communicating with the second storage device. The second storage device may be a tape emulation unit.
    Type: Grant
    Filed: July 26, 2018
    Date of Patent: January 18, 2022
    Assignee: EMC IP Holding Company LLC
    Inventor: Douglas E. LeCrone
  • Publication number: 20220012138
    Abstract: Obtaining a consistent set of snapshots of a group of storage volumes includes obtaining a plurality of snapshots, each of the snapshots being for one of the volumes, determining if there are any specific write operations to at least one volume that occurred after obtaining a first one of the snapshots and before obtaining a last of the snapshots, if there are any specific write operations, discarding the plurality of snapshots, and, if there are no specific write operations, designating the plurality of snapshots as the consistent set of snapshots. Obtaining a consistent set of snapshots may include repeatedly obtaining a plurality of snapshots and determining if there are specific write operations until either a particular condition is met or there are no specific write operations determined. The particular condition may be exceeding a predetermined number of iterations or a predetermined time limit.
    Type: Application
    Filed: July 9, 2020
    Publication date: January 13, 2022
    Applicant: EMC IP Holding Company LLC
    Inventors: Evan G. Jones, Douglas E. LeCrone, Brett A. Quinn
  • Publication number: 20210377187
    Abstract: Using an alternative communication protocol between a first system and a second system that are otherwise configured to communicate using a FICON protocol includes the first system determining if the alternative communication protocol is handled by the second system, the first system providing encapsulated data by encapsulating FICON data if the alternative communication protocol is handled at the second system, and the first system transmitting the encapsulated data directly to the second system using the alternative communication protocol if the alternative communication protocol is handled at the second system. The alternative communication protocol may be TCP/IP. At least one of the systems is a host computing system, an array storage system, and/or a tape emulation system. At least one of the systems may be a simulation of a host computing system, an array storage system, and/or a tape emulation system.
    Type: Application
    Filed: May 28, 2020
    Publication date: December 2, 2021
    Applicant: EMC IP Holding Company LLC
    Inventors: Douglas E. LeCrone, Jeffrey L. Jones
  • Publication number: 20210373794
    Abstract: Maintaining a timestamp indicating when data transferred to a remote storage system was written by a host at a local storage system includes writing a timestamp file at the local storage system, the timestamp file being part of a first chunk of data corresponding to current writes to the local storage system by the host, providing a second chunk at the local storage system, the second chunk being different from the first chunk and corresponding to writes by the host that were begun prior to beginning any of the writes for the first chunk, and transferring the writes for the second chunk to the remote storage system. Each chunk may be assigned a sequence number. The remote storage system may acknowledge receipt after receiving all data for the second chunk. The second chunk may be written to the remote storage system after receiving all data for the second chunk.
    Type: Application
    Filed: May 27, 2020
    Publication date: December 2, 2021
    Applicant: EMC IP Holding Company LLC
    Inventors: Brett A. Quinn, Douglas E. LeCrone
  • Patent number: 11163644
    Abstract: Adapting a storage system in response to operation of a corresponding host includes determining whether the host is performing a boot up operation, determining whether the host is performing a shutdown operation, and adapting operation of the storage system in response to the host performing one of: a boot up operation or a shutdown operation. Adapting operation of the storage system may include suspending low-priority housekeeping tasks, decreasing work queue scan times to be more responsive to incoming work, moving cores from other emulations, increasing thread counts, and/or preloading specified files into cache memory of the storage system. Determining whether the host is performing a boot up operation may include making a call from the storage system to the host that causes the host to return an indication thereof. Operations that are characteristic of booting up may be determined by machine learning.
    Type: Grant
    Filed: September 3, 2019
    Date of Patent: November 2, 2021
    Assignee: EMC IP Holding Company LLC
    Inventors: Douglas E. LeCrone, Paul A. Linstead
  • Patent number: 11163708
    Abstract: Communicating between a first device and a second device includes the first device generating command mode control words for communication with the second device, the first device converting the command mode control words into transport mode control words prior to transmitting the control words to the second device, the first device receiving transport mode control words from the second device, and the first device converting the transport mode control words received from the second device into received command mode control words. An application running on the first device may generate command mode control words for communication with the second device. The application may directly provide command mode control words to an ssch or channel subsystem layer. The first device may convert the command mode control words into transport mode control words using an ssch or channel subsystem layer. The first device may be a host computing system.
    Type: Grant
    Filed: April 14, 2020
    Date of Patent: November 2, 2021
    Assignee: EMC IP Holding Company LLC
    Inventors: Douglas E. LeCrone, Paul A. Linstead
  • Patent number: 11163477
    Abstract: Causing an application on a host to access a point-in-time image on a storage system includes the application generating concurrent copy commands that are designed to cause data to be copied from a first location to a second location independent of whether the data is accessed by the host following initiating creation of a concurrent copy, intercepting concurrent copy commands and data generated by the application prior to sending the commands and data from the host to the storage system, transforming the concurrent copy commands and data to revised commands and data that are used to access the point-in-time image. Transforming the concurrent copy commands may include allocating temporary space on the storage system. The revised commands and data are sent from the host to the storage system. All commands generated by the application may be intercepted by the drivers layer. Only concurrent copy commands may be transformed.
    Type: Grant
    Filed: October 29, 2019
    Date of Patent: November 2, 2021
    Assignee: EMC IP Holding Company LLC
    Inventors: Douglas E. LeCrone, Bruce A. Pocock
  • Publication number: 20210271559
    Abstract: Extending snapshot retention for a storage system includes creating a plurality of entries, each of the entries corresponding to snapshot data on the storage system and containing data that was written in connection with the snapshot and containing a map indicating which portions of the storage system were modified and includes transferring the entries to an external storage that is separate from the storage system. The map may be an SDDF map that indicates tracks of data that were modified. The external storage may be a cloud storage. Each of the entries may be created prior to deleting data for a corresponding snapshot on the storage system. The entries may be transferred directly from the storage system to the external storage. Extending snapshot retention for a storage system may also include periodically writing a full version of data from the storage device to the external storage.
    Type: Application
    Filed: February 27, 2020
    Publication date: September 2, 2021
    Applicant: EMC IP Holding Company LLC
    Inventors: Douglas E. LeCrone, Brett A. Quinn
  • Patent number: 11106605
    Abstract: Communicating with a tape drive emulation unit that communicates using command mode or transport mode includes the tape drive emulation unit receiving an inquiry about whether the tape drive emulation unit communicates using transport mode, the tape drive emulation unit responding to the inquiry by indicating that the tape drive emulation unit does communicate using transport mode, and the tape drive emulation unit servicing transport mode commands until receiving a release command. The tape drive emulation unit may include a front end component, a data mover/server, and a tape emulation storage device. The data mover/server may include an NFS server. A host may communicate with the tape emulation unit. The host and the tape emulation unit may be coupled using a FICON connection. A host application may send commands to the tape emulation unit and may receive commands from the tape emulation unit using command mode.
    Type: Grant
    Filed: April 23, 2019
    Date of Patent: August 31, 2021
    Assignee: EMC IP Holding Company LLC
    Inventors: Douglas E. LeCrone, Paul A. Linstead
  • Publication number: 20210232458
    Abstract: Backing up logical data from a storage system to a backup system includes accessing data on the storage system corresponding to logical file structures of data stored on the storage system, using machine learning to ascertain file access patterns and frequency of file backups, determining backup data based on the logical file structure of data stored on the storage system and the file access patterns and frequency of file backups, and directly transferring data corresponding the backup data from the storage system to the backup system. The logical file structures may be provided by file metadata. The file metadata may include at least one of: a VTOC (volume table of contents), an IXVTOC (indexed VTOC), VSAM (virtual storage access method) information, a VVDS (VSAM volume data set), file attributes, and/or catalog data. The file attributes may include management class information for each of the files.
    Type: Application
    Filed: January 28, 2020
    Publication date: July 29, 2021
    Applicant: EMC IP Holding Company LLC
    Inventors: Douglas E. LeCrone, Brett A. Quinn
  • Patent number: 11068172
    Abstract: Accessing data using a first storage device and a second storage device that is a synchronous mirror of the first storage device includes determining if the first and second storage devices support alternative mirroring that bypasses having the first storage device write data to the second storage device and choosing to write data to the first storage device only or both the first and second storage device based on criteria that includes metrics relating to timing, an identity of a calling process or application, a size of an I/O operation, an identity of a destination volume, a time of day, a particular host id, a particular application or set of applications, and/or particular datasets, extents, tracks, records/blocks. A single I/O operation may be bifurcated to provide a portion of the I/O operation to only the first storage device or to both the first storage device and the second storage device.
    Type: Grant
    Filed: September 30, 2015
    Date of Patent: July 20, 2021
    Assignee: EMC IP Holding Company LLC
    Inventors: Douglas E. LeCrone, Paul A. Linstead, Brett A. Quinn