Quantum Assigned Two Patents

Log structured block device for hard disk drive
Quantum Corporation, San Jose, CA, has been assigned a patent (10,235,101) developed by Doerner, Don, San Jose, CA, for a “log structured block device for hard disk drive.“

The abstract of the patent published by the U.S. Patent and Trademark Office states: ”Example apparatus and methods provide a log structured block device for a hard disk drive, (HDD). Data that is to be stored on an HDD is serialized and written as a series of data blocks using a sequential write. Information about where individual data blocks were supposed to be written, (e.g., actual address), neighboring data blocks, where data blocks were actually written, and how often data blocks are accessed is maintained. During garbage collection, data blocks that are being accessed with similar frequencies may be relocated together, with the most frequently accessed, (e.g., hottest) data blocks migrating to the outer cylinders of the disk and the least frequently accessed, (e.g., coldest) data blocks migrating to the inner cylinders. Blocks stored in the same temperature regions that were intended to be located together when written may be repositioned to facilitate sequential reads.”

The patent application was filed on November 6, 2017 (15/804,238).

Power savings in cold storage
Quantum Corporation, San Jose, CA, has been assigned a patent (10,235,239) developed by Arslan, Suayb S., Irvine, CA, and Goker, Turguy, Vista, CA, for a “power savings in cold storage.“

The abstract of the patent published by the U.S. Patent and Trademark Office states: ”Methods and apparatus associated with data cold storage are described. Example apparatus include an array of data storage devices arranged in rows and columns. Columns of the array are orthogonal to rows. A row has an associated row-centric power supply, and a column has an associated column-centric local electronics module, (LEM) that controls a data storage device in the column independently of other data storage devices in the array. Example apparatus include logics that control a power mode of a data storage device independently of other data storage devices in the array, that control a power mode of an LEM, that adaptively regulate the level of data stored in a buffer, and that determine whether a data object will be stored in the buffer or stored on a data storage device in the array, based on the probability the data object will be accessed within a threshold period of time.”

The patent application was filed on April 2, 2018 (15/942,686).