Quantum Assigned Seven Patents

Diagnostic tape cartridge patterned with predetermined head-media spacings for testing tape head of tape drive
Quantum Corporation, San Jose, CA, has been assigned a patent (10,559,322) developed by Peng, James P., Santa Maria, CA, Goker, Turguy, Solana Beach, CA, Le, Hoa, Orange, CA, Arslan, Suayb S., Sariyer/Istanbul, Turkey, and Saliba, George A., Boulder, CO, for a “diagnostic tape cartridge patterned with predetermined head-media spacings for testing a tape head of a tape drive.“

The abstract of the patent published by the U.S. Patent and Trademark Office states: ”A diagnostic tape, (318) for use with a tape drive, 310) having a tape head, (322) includes a first tape section, (430A) and a second tape section, (430B). The first tape section, (430A) and the second tape section, (430B) are configured to move across the tape head, (322) during use of the tape drive, (310). The first tape section, (430A) includes a first patterned data code, (432A) that is indicative of a first spacing between the tape head, (322) and the first tape section, (430A). The second tape section, (430B) includes a second patterned data code, (432B) that is indicative of a second spacing between the tape head, (322) and the second tape section, (430B). The second patterned data code, (432B) is different than the first patterned data code, (432A). The diagnostic tape, (318) can further include a tape head cleaning section, (630F) including abrasive material, (650) that is configured to move across the tape head, (322) to clean the tape head, (322).”

The patent application was filed on January 14, 2019 (16/246,668).

In-situ data verification for cloud
Quantum Corporation, San Jose, CA, has been assigned a patent (10,552,640) developed by Doerner, Don, and Wade, Gregory L., San Jose, CA, for an “in-situ data verification for the cloud.“

The abstract of the patent published by the U.S. Patent and Trademark Office states: ”Example methods and apparatus asynchronously verify data stored in a cloud data storage system. One embodiment comprises a monitoring circuit that determines if a data auditing condition associated with a cloud storage system or archived data stored in the cloud storage system has been met, a metadata mirror circuit that controls a metadata mirror to provide metadata, including a first checksum, associated with the archived data to the apparatus, a checksum circuit that computes a second checksum based on the archived data, a verification circuit that generates an audit of the first checksum and the second checksum by comparing the second checksum with the first checksum, and a reporting circuit that generates a log of the audit, that provides the log to the data storage system, and that provides a notification of a data integrity failure to a user associated with the archived data.”

The patent application was filed on June 26, 2017 (15/632,584).

Recursive multi-threaded file system scanner for serializing file system metadata exoskeleton
Quantum Corporation, San Jose, CA, has been assigned a patent (10,545,915) developed by Barry, Tim, Minneapolis, MN, and Lord, Stephen, Prior Lake, MN, for a “recursive multi-threaded file system scanner for serializing file system metadata exoskeleton.“

The abstract of the patent published by the U.S. Patent and Trademark Office states: ”Methods, apparatus, and other embodiments facilitate discovering and serializing metadata for a file system. After initializing or accessing a serialization data structure, recursive search threads that begin at a selected location in the file system are spawned. The threads analyzes the selected location in the file system, acquire metadata associated with the selected location in the file system, serialize the metadata associated with the selected location in the file system into the serialization data structure, and then selectively spawn additional recursive search threads. Additional recursive search threads may be spawned upon determining that the current recursive search thread has reached a branch point in a hierarchy of the file system. Different threads may perform different types of searches, (e.g., depth-first breadth-first) and may operate in parallel. The serialization data structure may be persisted and surfaced in an object, (e.g., JSON object) that can be queried or searched.”

The patent application was filed on October 26, 2015 (14/922,432).

Filter file system with inode number as primary database key
Quantum Corporation, San Jose, CA, has been assigned a patent (10,503,692) developed by Wideman, Roderick, Shakopee, MN, Doerner, Don, and Zeis, Michael, San Jose, CA, for a “filter file system with inode number as primary database key.“

The abstract of the patent published by the U.S. Patent and Trademark Office states: ”Example apparatus and methods identify files that are so small or so large that they compromise the efficient operation of a file system that uses re-assignable one-to-one inodes and inode numbers. Small files are aggregated into collections of files and large files are subdivided into collections of smaller files. Information for locating multiple related files with fewer lookups is generated and stored in a folder. An inode having a new type of inode number is then created. The new type of inode number encodes information for finding the folder. The encoded information may include a folder identifier that acts as a primary key into a database that is configured to locate a member of the aggregated or subdivided files with a single lookup. A filter file system may be updated with the new inode. The new inode number is unique within the filter file system and may not be re-assigned.”

The patent application was filed on January 27, 2016 (15/007,267).

Reliable and efficient filesystem metadata conversion
Quantum Corporation, San Jose, CA, has been assigned a patent (10,496,612) developed by LaBerge, Tim, St. Paul, MN, for “method for reliable and efficient filesystem metadata conversion.“

The abstract of the patent published by the U.S. Patent and Trademark Office states: ”A method for converting metadata in a hierarchical configuration within a filesystem from a first format to a second format includes reading metadata that is in the first format within the hierarchical configuration, writing all of the metadata that is in the first format into a flat file, scanning the metadata to compile a list of inode chunks, sorting the list of inode chunks based on the on disk location of the inode chunks, and writing all of the metadata from the flat file back into the hierarchical configuration, the metadata being in the second format. The method can also include increasing the size of each of a first inode and a second inode within a first inode chunk in the filesystem, assigning the first inode to the first inode chunk, and assigning the second inode to a second inode chunk.”

The patent application was filed on May 10, 2017 (15/592,179).

Sequential access storage and data de-duplication
Quantum Corporation, San Jose, CA, has been assigned a patent (10,496,523) developed by Wideman, Roderick B., Shakopee, MN, for “sequential access storage and data de-duplication.“

The abstract of the patent published by the U.S. Patent and Trademark Office states: ”An example method includes determining a configuration of two or more partitions for a sequential access medium. At least one partition stores data de-duplication data structures while at least one other partition stores a repository of unique data blocks associated with the data structures. The method also includes controlling a data de-duplication computer to configure the sequential access medium according to the configuration. The method includes producing an output sequence for writing the data structures and a set of unique data blocks associated with the set of data structures to the sequential access medium as configured with the two or more partitions. One embodiment includes controlling a data de-duplication computer to write the data de-duplication data structures and the set of unique data blocks to the sequential access medium according to the output sequence.”

The patent application was filed on December 20, 2016 (15/385,023).

Data deduplication with adaptive erasure code redundancy
Quantum Corporation, San Jose, CA, has been assigned a patent (10,484,016) developed by Wideman, Roderick B., Shakopee, MN, Arslan, Suayb Sefik, Irvine, CA, Lee, Jaewook, Aliso Vlejo, CA, and Goker, Turguy, Irvine, CA, for a “data deduplication with adaptive erasure code redundancy.“

The abstract of the patent published by the U.S. Patent and Trademark Office states: ”Example apparatus and methods combine erasure coding with data deduplication to simultaneously reduce the overall redundancy in data while increasing the redundancy of unique data. In one embodiment, an efficient representation of a data set is produced by deduplication. The efficient representation reduces duplicate data in the data set. Redundancy is then added back into the data set using erasure coding. The redundancy that is added back in adds protection to the unique data associated with the efficient representation. How much redundancy is added back in and what type of redundancy is added back in may be controlled based on an attribute, (e.g., value, reference count, symbol size, number of symbols) of the unique data. Decisions concerning how much and what type of redundancy to add back in may be adapted over time based, for example, on observations of the efficiency of the overall system.”

The patent application was filed on May 23, 2017 (15/602,726).