EMC IP Holding/Dell Technologies Assigned Twenty-Five Patents

RAID group configuration and storage drive distribution based on storage drive health
EMC IP Holding Company LLC (a Dell Technologies, Inc. company), Hopkinton, MA, has been assigned a patent (11,347,407) developed by Dalmatov, Nickolay, and Danilov, Mikhail, Saint Petersburg, Russia, for “RAID (redundant array of independent disks) group configuration and storage drive distribution based on storage drive health.“

The abstract of the patent published by the U.S. Patent and Trademark Office states: “Drive health information is collected for each one of the data storage drives in one or more RAID groups of data storage drives, and is used to calculate a faultiness level of each data storage drive in the RAID group(s). A suitable RAID level for configuration of at least one RAID group may be generated based on the faultiness levels of the data storage drives contained in the RAID group. A faultiness-balanced distribution of the data storage drives across multiple RAID groups may be generated based on the faultiness levels of individual data storage drives. The data storage drives may be automatically redistributed across the multiple RAID groups according to the faultiness-balanced distribution of the data storage drives.”

The patent application was filed on September 30, 2020 (17/038,645).

Sharing spare storage capacity between log structured file system and RAID
EMC IP Holding Company LLC (a Dell Technologies, Inc. company), Hopkinton, MA, has been assigned a patent (11,347,404) developed by Vankamamidi, Vamsi, Hopkinton, MA, Armangau, Philippe, and Lee, Shuyu, Acton, MA, for “system and method for sharing spare storage capacity between a log structured file system and RAID.“

The abstract of the patent published by the U.S. Patent and Trademark Office states: “A method, computer program product, and computer system for identifying, by a computing device, a first amount of storage space reserved by RAID for a RAID rebuild of a failed drive. A second amount of the storage space reserved by a file system may be identified, wherein the storage space may be shared between the RAID and the file system. The RAID rebuild of the failed drive may be performed. The first amount of the storage space may be allocated to the RAID from the second amount of the storage space reserved by the file system.”

The patent application was filed on August 1, 2019 (16/529,386).

Device and computer program for locking at least 2 address references pointing to storage block in RAID type conversion
EMC IP Holding Company LLC (a Dell Technologies, Inc. company), Hopkinton, MA, has been assigned a patent (11,340,819) developed by Gao, Jian, and Xu, Xinlei, Beijing, China, for “method, device and computer program product for locking at least two address references pointing to storage block in RAID type conversion.“

The abstract of the patent published by the U.S. Patent and Trademark Office states: “Techniques provide for Redundant Array of Independent Disks RAID type conversion. Such techniques involve: determining, based on a type of the target RAID, a plurality of storage spaces from a plurality of available storage disks for forming the target RAID, copying data from a first storage block of a source RAID to a corresponding second storage block in the plurality of storage spaces, wherein a first logical block address of the first storage block in the source RAID is identical to a second logical block address of the second storage block in the target RAID, determining at least one address reference associated with the first storage block, and updating the at least one address reference to point to the second storage block.”

The patent application was filed on March 17, 2020 (16/821,398).

Deallocation of drive extents for mapped RAID extents
EMC IP Holding Company LLC (a Dell Technologies, Inc. company), Hopkinton, MA, has been assigned a patent (11,340,816) developed by Dalmatov, Nickolay, and Danilov, Mikhail, Saint Petersburg, Russia, for a “deallocation of drive extents for mapped RAID (redundant array of independent disks) extents.“

The abstract of the patent published by the U.S. Patent and Trademark Office states: “A mapped RAID system with a protection group of physical data storage drives calculates an affinity value for each pair of physical data storage drives in the protection group that is equal to a total number of RAID extents to which at least one drive extent is allocated from each of the physical data storage drives in the pair. A change from a previous level of RAID protection to a new level of RAID protection provided by one of the RAID extents is detected. The new level of RAID protection provided by the RAID extent uses fewer drive extents than the previous level of RAID protection provided by the RAID extent. The disclosed technology selects one of the drive extents previously allocated to the RAID extent for deallocation such that the range of the affinity values is minimized after deallocation of the drive extent.”

The patent application was filed on July 28, 2020 (16/940,758).

Method, device and computer program product for recovering data
EMC IP Holding Company LLC (a Dell Technologies, Inc. company), Hopkinton, MA, has been assigned a patent (11,314,594) developed by Tang, Haiying, Wu, Zhilong, Kang, Jianbin, Shang, Rongrong, and Gao, Jian, Beijing, China, for “method, device and computer program product for recovering data.“

The abstract of the patent published by the U.S. Patent and Trademark Office states: “Techniques involve determining whether data read from a redundant array of independent disks (RAID) is corrupted, the RAID including two parity disks. The techniques further involve determining, based on the read data being corrupted, whether single-disk data recovery can recover the corrupted data. The techniques further involve recovering, based on the single-disk data recovery failing to recover the corrupted data, the corrupted data using dual-disk data recovery. Such techniques may present a recovery solution for silent data corruption of a RAID with two parity disks, such that corrupted data can be recovered in the case of either a single-disk failure or a dual-disk failure, thereby improving the storage system performance.”

The patent application was filed on September 17, 2020 (17/023,815).

Control method of disk failure, electronic device and computer readable storage medium
EMC IP Holding Company LLC (a Dell Technologies, Inc. company), Hopkinton, MA, has been assigned a patent (11,314,581) developed by Li, Chenglin, Luo, Mingyi, Chengdu, China, Zeng, Hongyuan, Sichuan, China, and Zhang, Ruiyang, Chengdu, China, for “control method of disk failure, electronic device and computer readable storage medium.“

The abstract of the patent published by the U.S. Patent and Trademark Office states: “Techniques for disk failure control involve determining the number of failed disks in a Redundant Array of Independent Disks (RAID). The techniques further involve comparing the number of failed disks with a predetermined threshold, and in accordance with a determination that the number of failed disks exceeds the predetermined threshold, setting at least one non-failing disk in the RAID into a protection mode to prevent the at least one non-failing disk from being disconnected. Such techniques facilitate prevention of the user data loss in the RAID.”

The patent application was filed on May 21, 2020 (16/880,154).

Balancing resiliency and performance by selective use of degraded writes and spare capacity in storage
EMC IP Holding Company LLC (a Dell Technologies, Inc. company), Hopkinton, MA, has been assigned a patent (11,301,162) developed by Matosevich, Rivka, Zichron Ya’acov, Israel, Shatsky, Yosef, Karnei Shomron, Israel, and Tal, Doron, Haifa, Israel, for “balancing resiliency and performance by selective use of degraded writes and spare capacity in storage systems.“

The abstract of the patent published by the U.S. Patent and Trademark Office states: “Techniques are provided for processing user input/output (I/O) write requests in a fault-tolerant data storage system (e.g., a RAID storage system) by selecting between performing a degraded write operation or a write operation to spare capacity, when the fault-tolerant data storage system is operating in a degraded mode. A method includes receiving a user I/O write request comprising data to be written to a RAID array operating in a degraded mode, and determining whether spare capacity has been allocated for rebuilding missing data of an inaccessible storage device of the RAID array and whether a missing data block, which is associated with I/O write request, has been rebuilt to the spare capacity. A degraded write operation is performed without using the spare capacity, when the missing data block, which is associated with the data of the I/O write request, has not been rebuilt to the allocated spare capacity.”

The patent application was filed on May 31, 2020 (16/888,742).

Maintaining reliability of RAID
EMC IP Holding Company LLC (a Dell Technologies, Inc. company), Hopkinton, MA, has been assigned a patent (11,294,569) developed by Han, Geng, Gao, Jian, Dong, Jibing, Gao, Hongpo, and Gong, Shaoqin, Beijing, China, for “method and apparatus for maintaining reliability of a RAID.“

The abstract of the patent published by the U.S. Patent and Trademark Office states: “A method and an apparatus for maintaining reliability of a mapped redundant array of independent disks. The method comprises: determining a first data loss probability, the first data loss probability indicating reliability of a traditional redundant array of independent disks, determining a second data loss probability, the second data loss probability indicating reliability of the mapped redundant array of independent disks, and determining, based on the first and second data loss probabilities, a condition for maintaining the reliability of the mapped redundant array of independent disks. Compared with the prior art, embodiments of the present disclosure can effectively predict the reliability of a mapped RAID through comparison with a traditional RAID, so as to be capable of determining a reliability relationship between the traditional RAID and the mapped RAID. In this way, the reliability of the traditional RAID will not be degraded when being expanded into the mapped RAID.”

The patent application was filed on January 21, 2020 (16/748,175).

Method, device and computer program product for storing data
EMC IP Holding Company LLC (a Dell Technologies, Inc. company), Hopkinton, MA, has been assigned a patent (11,287,996) developed by Kang, Jianbin, Han, Geng, Gao, Jian, Dong, Jibing, and Xu, Xinlei, Beijing, China, for “method, device and computer program product for storing data.“

The abstract of the patent published by the U.S. Patent and Trademark Office states: “Techniques involve dividing a disk in RAID into a plurality of slices, and the plurality of slices include a first slice and a second slice with a first size. The techniques further involve dividing the second slice into a plurality of sub-slices, and each sub-slice in the plurality of sub-slices has a second size smaller than the first size. The techniques further involve forming a first stripe set for storing user data using the first slice and forming a second stripe set for storing metadata using the sub-slices. Such techniques enable configuring a smaller slice size for the set stripe for the metadata, and thus the granularity of storage and migration for the metadata can be reduced, and the metadata can be distributed into more disks in the RAID.”

The patent application was filed on May 19, 2020 (16/877,871).

Method, electronic device and computer readable storage medium for storage management
EMC IP Holding Company LLC (a Dell Technologies, Inc. company), Hopkinton, MA, has been assigned a patent (11,287,976) developed by Shang, Rongrong, Jia, Ruiyong, Ni, Shuai, Xia, Sihang, and Zhao, Zhenhua, Beijing, China, for “method, electronic device and computer readable storage medium for storage management.“

The abstract of the patent published by the U.S. Patent and Trademark Office states: “Techniques involve: in response to adding a second set of disks into a redundant array of independent disks (RAID) including a first set of disks and a total number of disks in the first and second sets exceeding a predetermined threshold, determining types and numbers of disks in the first and second sets, respectively, determining, based on the types and numbers of the disks determined and a performance indicator of the RAID having the added second set, respective types and numbers of disks comprised in a plurality of sets to which the disks in the RAID are to be allocated, and performing, based on the type and number of disks in the first set and the respective types and numbers of disks, an allocation of a disk in the first set to one of the plurality of sets, until all the disks in the first set have been allocated.”

The patent application was filed on March 17, 2020 (16/821,410).

Managing mapped RAID extents in storage systems
EMC IP Holding Company LLC (a Dell Technologies, Inc. company), Hopkinton, MA, has been assigned a patent (11,281,537) developed by Gao, Jian, Beijing, China, Usvyatsky, Ilya, Northborough, MA, Li, Weihua, Han, Geng, Xu, Xinlei, and Dong, Jibing, Beijing, China, for “managing mapped RAID extents in data storage systems.“

The abstract of the patent published by the U.S. Patent and Trademark Office states: “A technique for use in managing mapped RAID extents is disclosed. A neighborhood matrix denoting a distribution of neighboring physical storage portions across the N physical storage devices of the pool is created and initialized. A disk extent consumed array denoting a disk consumption metric is created and initialized. Disks in an extent pool are analyzed to identify a least consumed disk in the extent pool and a disk extent is allocated from the identified disk. The allocated disk extent is configured as a first disk extent for a first RAID extent. The neighborhood matrix and disk extent consumed array are updated appropriately. All the disks in the extent pool are analyzed to identify a valid disk extent that will result in the lowest variance value in the neighborhood matrix. The identified valid disk extent is allocated and the neighborhood matrix and disk extent consumed array are again updated.”

The patent application was filed on October 2, 2019 (16/590,443).

Implementing heterogeneous media types with RAID
EMC IP Holding Company LLC (a Dell Technologies, Inc. company), Hopkinton, MA, has been assigned a patent (11,275,518) developed by Gao, Jian, Beijing, China, Lee, Shuyu, Acton, MA, Han, Geng, Xu, Xinlei, Gao, Hongpo, and Dong, Jibing, Beijing, China, for “system and method for implementing heterogeneous media types with RAID.“

The abstract of the patent published by the U.S. Patent and Trademark Office states: “A method, computer program product, and computer system for receiving, by a computing device, a request to create a heterogeneous storage object. A first storage object of the heterogeneous storage object may be created with a first RAID type. A second storage object of the heterogeneous storage object may be created with a second RAID type. The heterogeneous storage object may be persisted to a data store.”

The patent application was filed on November 1, 2019 (16/671,528).

Selecting RAID level for storage device segment extent
EMC IP Holding Company LLC (a Dell Technologies, Inc. company), Hopkinton, MA, has been assigned a patent (11,275,513) developed by Dalmatov, Nickolay, and Danilov, Mikhail, St. Petersburg, Russia, for “system and method for selecting a redundant array of independent disks (RAID) level for a storage device segment extent.“

The abstract of the patent published by the U.S. Patent and Trademark Office states: “A method, computer program product, and computing system for receiving telemetry data associated with a plurality of storage devices. A storage device reliability level may be defined for each storage device based upon, at least in part, the telemetry data associated with the plurality of storage devices. Each storage device may be partitioned into a plurality of storage device segments. A storage device segment reliability level may be defined for the plurality of storage device segments based upon, at least in part, the storage device reliability level of the plurality of storage devices. A subset of the plurality of storage device segments may be combined, thus defining a storage device segment extent. A RAID level for the storage device segment extent may be selected based upon, at least in part, the storage device segment reliability level of each storage device segment of the storage device segment extent.”

The patent application was filed on May 22, 2020 (16/882,026).

Content aware disk extent movement in RAID
EMC IP Holding Company LLC (a Dell Technologies, Inc. company), Hopkinton, MA, has been assigned a patent (11,269,562) developed by Dalmatov, Nickolay Alexandrovich, and Danilov, Mikhail Viktorovich, St. Petersburg, Russia, for “system and method for content aware disk extent movement in RAID.“

The abstract of the patent published by the U.S. Patent and Trademark Office states: “A method, computer program product, and computer system for identifying, by a computing device, information associated with a relationship between a physical layer block and a virtual logic block for RAID storage. The information associated with the relationship between the physical layer block and the virtual logic block may be written within the RAID storage.”

The patent application was filed on January 28, 2020 (16/774,387).

Storage management, electronic device and computer program
EMC IP Holding Company LLC (a Dell Technologies, Inc. company), Hopkinton, MA, has been assigned a patent (11,269,530) developed by Gao, Jian, Dong, Jibing, Han, Geng, Kang, Jianbin, and Yang, Lifeng, Beijing, China, for “method for storage management, electronic device and computer program product.“

The abstract of the patent published by the U.S. Patent and Trademark Office states: “Techniques for storage management involve determining an independent redundant disk array RAID associated with a first set of storage disks, a first portion of storage blocks corresponding to the RAID being located in the first set of storage disks, determining, from the first set of storage disks, a plurality of storage disks corresponding to the RAID, and updating a set of association degrees of the first set of storage disks to indicate data coupling between storage disk pairs in the plurality of storage disks. Accordingly, the data coupling degree between storage disks can be determined more accurately.”

The patent application was filed on July 23, 2020 (16/936,732).

Mapped RAID with drive health aware protection groups
EMC IP Holding Company LLC (a Dell Technologies, Inc. company), Hopkinton, MA, has been assigned a patent (11,262,920) developed by Dalmatov, Nickolay, and Danilov, Mikhail, Saint Petersburg, Russia, for a “mapped RAID (redundant array of independent disks) with drive health aware protection groups.“

The abstract of the patent published by the U.S. Patent and Trademark Office states: “Mapped RAID protection is provided for data written into multiple logical RAID spaces, and the data written to each one of the RAID spaces is stored in data storage drives contained in a corresponding one of multiple protection groups of data storage drives. Drive health information is collected for each data storage drive contained in the protection groups, and a faultiness level of each individual data storage drive in the protection groups is calculated based on the drive health information. A faultiness-balanced distribution of the data storage drives across the protection groups is then generated based on the calculated faultiness levels of the individual data storage drives.”

The patent application was filed on September 30, 2020 (17/038,869).

Data placement for RAID groups of heterogeneous storage device capacities
EMC IP Holding Company LLC (a Dell Technologies, Inc. company), Hopkinton, MA, has been assigned a patent (11,249,692) developed by Martin, Owen, Hopedale, MA, for a “data placement for RAID groups of heterogeneous storage device capacities.“

The abstract of the patent published by the U.S. Patent and Trademark Office states: “Techniques for performing data movements may include configuring RAID groups included in a same storage tier, wherein a first of the RAID groups includes a first plurality of physical storage devices each having a first storage capacity, and wherein a second of the RAID groups includes a second plurality of physical storage devices each having a second storage capacity, wherein the first storage capacity is different than the second storage capacity, selecting, in accordance with criteria, a first data portion from the first RAID group for data movement to the second RAID group, wherein the criteria includes a read workload criterion that specifies a same target read I/O workload for each of the plurality of RAID groups, and responsive to said selecting the first data portion for data movement, performing the data movement of the first data portion from the first RAID group to the second RAID group.”

The patent application was filed on May 19, 2020 (16/877,739).

Storage with efficient data and parity distribution across mixed-capacity storage
EMC IP Holding Company LLC (a Dell Technologies, Inc. company), Hopkinton, MA, has been assigned a patent (11,249,654) developed by Shatsky, Yosef, Karnei Shomron, Israel, and Matosevich, Rivka, Zichron Ya’acov, Israel, for a “storage system with efficient data and parity distribution across mixed-capacity storage devices.“

The abstract of the patent published by the U.S. Patent and Trademark Office states: “A storage system comprises mixed-capacity storage devices, including at least one or more storage devices having relatively low capacities and one or more storage devices having relatively high capacities. The storage system is configured to establish a redundant array of independent disks (RAID) arrangement comprising a plurality of stripes, with each of the plurality of stripes comprising a plurality of data blocks and one or more corresponding parity blocks, the data blocks and parity blocks being distributed across multiple ones of the storage devices. In conjunction with establishment of the RAID arrangement, the storage system is further configured to concentrate storage of the parity blocks in the one or more storage devices having the relatively high capacities. The storage devices in some embodiments comprise at least a first set of storage devices each having a first capacity and a second set of storage devices each having a second capacity higher than the first capacity.”

The patent application was filed on February 18, 2020 (16/793,163).

Providing RAID resiliency set from plurality of storage devices
EMC IP Holding Company LLC (a Dell Technologies, Inc. company), Hopkinton, MA, has been assigned a patent (11,231,859) developed by Shatsky, Yosef, Karnei Shomron, Israel, and Matosevich, Rivka, Zichron Ya’acov, Israel, for “providing a RAID resiliency set from a plurality of storage devices.“

The abstract of the patent published by the U.S. Patent and Trademark Office states: “A technique provides a RAID resiliency set from a plurality of storage devices. The technique involves identifying a minimum sub-RRS width based on a predefined RAID level to be enforced on the RRS. The technique further involves, based on the minimum sub-RRS width, allocating segments from the plurality of storage devices to create a maximum number of sub-RRSs. The technique further involves forming the RRS from the created maximum number of sub-RRSs.”

The patent application was filed on October 29, 2019 (16/666,972).

Coordinated reclaiming of storage space
EMC IP Holding Company LLC (a Dell Technologies, Inc. company), Hopkinton, MA, has been assigned a patent (11,221,948) developed by Armangau, Philippe, Acton, MA, Vankamamidi, Vamsi K., Hopkinton, MA, Karri, Ajay, South Grafton, MA, and Wang, Yubing, Southborough, MA, for a “coordinated reclaiming of data storage space.“

The abstract of the patent published by the U.S. Patent and Trademark Office states: “Coordinating a reclaiming of data storage space among processing nodes of a data storage system includes, by a first node in response to an event, performing local cleanup of first-node mapping data and issuing a request message to a second node, the request message identifying the data storage space to be reclaimed. The event may be a notification from a RAID component rebuilding a RAID volume. In response to the request message, the second node performs local cleanup of second-node mapping data and issues a completion message to the first node indicating that the second node has completed its part of the reclaiming of the data storage space. The first node responds to the completion message by marking the data storage space as being reclaimed and signaling to a source of the event that the data storage space is available for new use.”

The patent application was filed on October 25, 2019 (16/663,507).

Adaptive change of redundancy level of RAID
EMC IP Holding Company LLC (a Dell Technologies, Inc. company), Hopkinton, MA, has been assigned a patent (11,216,340) developed by Ma, Chun, and Yang, Lifeng, Beijing, China, for an “adaptive change of redundancy level of RAID.“

The abstract of the patent published by the U.S. Patent and Trademark Office states: “Techniques for storage management involve: detecting a trigger for an adjustment of a redundant level for a set of RAIDs. Each of the set of RAIDs includes one or more RAID extents. Each RAID extent is formed by a plurality of storage extents from a set of storage extents. The set of storage extents is obtained by dividing a plurality of storage disks into storage extents. The plurality of storage extents are located in different storage disks of the plurality of storage disks. The techniques further involve: in response to detecting the trigger, selecting, from the set of RAIDs, a target RAID for which the redundant level is to be adjusted. The techniques further involve: adjusting the redundant level of the target RAID from a first redundant level to a second redundant level. Such techniques can improve the performance of a RAID storage system.”

The patent application was filed on March 19, 2020 (16/824,016).

Compression offloading to RAID array storage enclosure
EMC IP Holding Company LLC (a Dell Technologies, Inc. company), Hopkinton, MA, has been assigned a patent (11,204,716) developed by Glimcher, Boris, Bnei Brak, Israel, Alkalay, Amitai, Kadima, Israel, and Schneider, Zvi, Tel Aviv, Israel, for a “compression offloading to RAID array storage enclosure.“

The abstract of the patent published by the U.S. Patent and Trademark Office states: “A storage system comprises a plurality of enclosures and a storage controller. Each enclosure comprises at least one processing device and a plurality of drives configured in accordance with a redundant array of independent disks (RAID) arrangement. The storage controller obtains data pages associated with an input-output request, provides the data pages to a processing device of a given enclosure, and issues a command to the processing device to perform at least one operation based at least in part on the data pages. The processing device of the given enclosure receives the data pages from the storage controller, generates compressed data pages based at least in part on the received data pages, stores one or more of the compressed data pages on the plurality of drives according to the RAID arrangement and returns information associated with the storage of the compressed data pages to the storage controller.”

The patent application was filed on January 31, 2019 (16/264,022).

Storage configured to guarantee sufficient capacity for distributed RAID rebuild process
EMC IP Holding Company LLC (a Dell Technologies, Inc. company), Hopkinton, MA, has been assigned a patent (11,194,664) developed by Shatsky, Yosef, Karnei Shomron, Israel, for a “storage system configured to guarantee sufficient capacity for a distributed RAID rebuild process.“

The abstract of the patent published by the U.S. Patent and Trademark Office states: “A storage system comprises a plurality of storage devices, and is configured to establish a redundant array of independent disks (RAID) arrangement comprising a plurality of stripes, with each of the plurality of stripes comprising a plurality of blocks, the blocks being distributed across multiple ones of the storage devices. In conjunction with establishment of the RAID arrangement, the storage system is further configured, for each of the plurality of stripes, to designate a particular one of the storage devices as a spare storage device for that stripe, and for each of the storage devices, to determine numbers of the stripes for which that storage device is designated as a spare device for respective ones of the other storage devices. A particular number of spare blocks is reserved for each of the storage devices based at least in part on its determined numbers of the stripes.”

The patent application was filed on April 20, 2020 (16/852,632).

Storage configured to guarantee sufficient capacity for distributed RAID rebuild process
EMC IP Holding Company LLC (a Dell Technologies, Inc. company), Hopkinton, MA, has been assigned a patent (11,169,880) developed by Shatsky, Yosef, Karnei Shomron, Israel, for a “storage system configured to guarantee sufficient capacity for a distributed RAID rebuild process.“

The abstract of the patent published by the U.S. Patent and Trademark Office states: “A storage system comprises a plurality of storage devices, and is configured to establish a redundant array of independent disks (RAID) arrangement comprising a plurality of stripes, with each of the plurality of stripes comprising a plurality of blocks, the blocks being distributed across multiple ones of the storage devices. In conjunction with establishment of the RAID arrangement, the storage system is further configured, for each of the plurality of stripes, to designate multiple ones of the storage devices as respective spare devices for that stripe, and for each of the storage devices, to determine numbers of the stripes for which that storage device is designated as a spare device for respective ones of the other storage devices in each of multiple spare levels and for each of multiple failure combinations. A particular number of spare blocks is reserved for each of the storage devices using the determined numbers.”

The patent application was filed on June 16, 2020 (16/902,890).

Methods, devices and computer readable medium for managing RAID
EMC IP Holding Company LLC (a Dell Technologies, Inc. company), Hopkinton, MA, has been assigned a patent (11,163,642) developed by Dong, Jibing, Gao, Jian, Han, Geng, and, Xu, Xinlei, Beijing, China, for “methods, devices and computer readable medium for managing a redundant array of independent disks.“

The abstract of the patent published by the U.S. Patent and Trademark Office states: “A technique involves: in response to establishing a stripe in a Redundant Array of Independent Disks, RAID, generating first mapping information of the stripe in a block allocated for the stripe, the RAID being built based on extents obtained by dividing disks, the stripe including a first extent set, the first mapping information recording respective disk locations of the first extent set, in response to a failure occurring in a first disk where a first extent in the first extent set is located, replacing the first extent with a second extent to obtain a second extent set corresponding to the stripe, generating second mapping information of the stripe in the block, to record respective disk locations of the second extent set, and in response to the first disk being recovered from the failure, restoring data in the stripe based on the first mapping information and the second mapping information.”

The patent application was filed on September 25, 2019 (16/582,267).