Patents by Inventor Kelly J. Beavers
Kelly J. Beavers 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: 20030001036Abstract: A method and apparatus for varying track recording speed to maximize host-to-tape data transfer rates is presented. Variable data transfer rates of host systems and networks are accommodated by continually adjusting the tape speed to match the tape drive to the host's actual transfer rate. jThe speed of the tape is adjusted according to both the level of data present in the tape drive data buffer and whether the current mode of the drive is write mode or read mode. In the preferred embodiment, when the tape speed is accelerated or decelerated while writing a number of data track pairs to tape, a predetermined number of dummy track pairs are first written to tape at the current speed. On the next write head phase after the speed is increased or decreased as appropriate while the read heads are over the track, a predetermined number of dummy track pairs followed by more data track pairs are written to the tape at the new speed.Type: ApplicationFiled: August 15, 2002Publication date: January 2, 2003Inventors: Kelly J. Beavers, Michael A. Blatchley, David L. Detro, Christopher J. Turner, Thomas E. Zaczek
-
Patent number: 6459540Abstract: A method and apparatus for varying track recording speed to maximize host-to-tape data transfer rates is presented. Variable data transfer rates of host systems and networks are accommodated by continually adjusting the tape speed to match the tape drive to the host's actual transfer rate. The speed of the tape is adjusted according to both the level of data present in the tape drive data buffer and whether the current mode of the drive is write mode or read mode. In the preferred embodiment, when the tape speed is accelerated or decelerated while writing a number of data track pairs to tape, a predetermined number of dummy track pairs are first written to tape at the current speed. On the next write head phase after the speed is increased or decreased as appropriate while the read heads are over the track, a predetermined number of dummy track pairs followed by more data track pairs are written to the tape at the new speed.Type: GrantFiled: September 4, 2001Date of Patent: October 1, 2002Assignee: Exabyte CorporationInventors: Kelly J. Beavers, Michael A. Blatchley, David L. Detro, Christopher J. Turner, Thomas E. Zaczek
-
Publication number: 20020030918Abstract: A method and apparatus for varying track recording speed to maximize host-to-tape data transfer rates is presented. Variable data transfer rates of host systems and networks are accommodated by continually adjusting the tape speed to match the tape drive to the host's actual transfer rate. jThe speed of the tape is adjusted according to both the level of data present in the tape drive data buffer and whether the current mode of the drive is write mode or read mode. In the preferred embodiment, when the tape speed is accelerated or decelerated while writing a number of data track pairs to tape, a predetermined number of dummy track pairs are first written to tape at the current speed. On the next write head phase after the speed is increased or decreased as appropriate while the read heads are over the track, a predetermined number of dummy track pairs followed by more data track pairs are written to the tape at the new speed.Type: ApplicationFiled: September 4, 2001Publication date: March 14, 2002Inventors: Kelly J. Beavers, Michael A. Blatchley, David L. Detro, Christopher J. Turner, Thomas E. Zaczek
-
Patent number: 6307701Abstract: A method and apparatus for varying track recording speed to maximize host-to-tape data transfer rates is presented. Variable data transfer rates of host systems and networks are accommodated by continually adjusting the tape speed to match the tape drive to the host's actual transfer rate. The speed of the tape is adjusted according to both the level of data present in the tape drive data buffer and whether the current mode of the drive is write mode or read mode. In the preferred embodiment, when the tape speed is accelerated or decelerated while writing a number of data track pairs to tape, a predetermined number of dummy track pairs are first written to tape at the current speed. On the next write head phase after the speed is increased or decreased as appropriate while the read heads are over the track, a predetermined number of dummy track pairs followed by more data track pairs are written to the tape at the new speed.Type: GrantFiled: October 20, 1998Date of Patent: October 23, 2001Assignee: Ecrix CorporationInventors: Kelly J. Beavers, Michael A. Blatchley, David L. Detro, Christopher J. Turner, Thomas E. Zaczek
-
Patent number: 4945429Abstract: This data security arrangement provides a significant level of data security in an automatic magnetic tape cartridge library by isolating the actual data from the control of the data retrieval process. This isolation is accomplished by the use of a plurality of architectural devices that dissociate control and data. The data written on the magnetic tape cartridges cannot be accessed by the library modules. The library modules are not electrically connected to the tape drives or the data bus that connects the tape drives to the host computer. In addition, library software on the host computer emulates an operator's console and intercepts all tape mount commands generated by the host computer. The library software translates these commands into control signals to activate the library module to retrieve a designated magnetic tape cartridge and load this cartridge into a tape drive. Thus, the data retrieval apparatus is separate from the library control apparatus.Type: GrantFiled: January 27, 1988Date of Patent: July 31, 1990Assignee: Storage Technology CorporationInventors: Frederick G. Munro, Kelly J. Beavers, Ronald W. Korngiebel, Raymond L. Lucchesi, Michael E. Moy
-
Patent number: 4932826Abstract: A storage and retrieval subsystem in a data processing system includes a plurality of magnetic tape cartridges, a host computer, and a library storage module storing the plurality of magnetic tape cartridges in substantially upright positions. The library storage module includes a first cylindrical array of storage cells centered about a vertical axis, a second cylindrical array concentrically arranged about the first array, and a library tape unit including a plurality of tape drives, each of the tape drives being adapted to receive one of the magnetic tape cartridges in a substantially horizontal transducing position. A robot within the library storage module is used to transfer selected ones of the magnetic tape cartridges between their substantially upright positions and the substantially horizontal transducing positions at a selected tape drive.Type: GrantFiled: August 24, 1989Date of Patent: June 12, 1990Assignee: Storage Technology CorporationInventors: Michael E. Moy, Kelly J. Beavers, Stuart W. Bray, Frank A. Goodknight, Paul Kummli, Eugene Kutasy, Raymond L. Lucchesi, Frederick G. Munro, Richard G. Sellke, Thomas J. Studebaker
-
Patent number: 4928245Abstract: A storage and retrieval subsystem in a data processing system includes a plurality or magnetic tape cartridges, a host computer, and a library storage module storing the plurality of magnetic tape cartridges in substantially upright positions. The library storage module includes a first cylindrical array of storage cells centered about a vertical axis, a second cylindrical array concentrically arranged about the first array, and a library tape unit including a plurality of tape drives, each of the tape drives being adapted to receive one of the magnetic tape cartridges in a substantially horizontal transducing position. A robot within the library storage module is used to transfer selected ones of the magnetic tape cartridges between their substantially upright positions and the substantially horizontal transducing positions at a selected tape drive.Type: GrantFiled: August 24, 1989Date of Patent: May 22, 1990Assignee: Storage Technology CorporationInventors: Michael E. Moy, Kelly J. Beavers, Stuart W. Bray, Frank A. Goodknight, Paul Kummli, Eugene Kutasy, Raymond L. Lucchesi, Frederick G. Munro, Richard G. Sellke, Thomas J. Studebaker
-
Patent number: 4864511Abstract: A storage and retrieval subsystem in a data processing system includes a plurality of magnetic tape cartridges, a host computer, and a library storage module storing the plurality of magnetic tape cartridges in substantially upright positions. The library storage module includes a first cylindrical array of storage cells centered about a vertical axis, a second cylindrical array concentrically arranged about the first array, and a library tape unit including a plurality of tape drives, each of the tape drives being adapted to receive one of the magnetic tape cartridges in a substantially horizontal transducing position. A robot within the library storage module is used to transfer selected ones of the magnetic tape cartridges between their substantially upright positions and the substantially horizontal transducing positions at a selected tape drive.Type: GrantFiled: January 27, 1987Date of Patent: September 5, 1989Assignee: Storage Technology CorporationInventors: Michael E. Moy, Stuart W. Bray, Paul Kummli, Kelly J. Beavers, Frank Goodknight, James R. Baer, Timothy C. Hughes, John L. Seabury, Steven F. Nugent, Thomas J. Studebaker, Eugene Kutasy, Richard G. Sellke
-
Patent number: 4843495Abstract: A tracking system and method are disclosed for a helical-scan recording device to automatically maintain the recording/playback heads in alignment with the stripes of recorded information on the magnetic tape. Each stripe on the magnetic tape includes a servo area having four distinct zones. An analog servo signal at a preselected frequency is recorded on one of the four zones on each stripe and is recorded at different ones of the four zones in succession on each group of four adjacent stripes. The servo signal recorded on the stripes is detected during playback and processed to maintain the desired head positioning relative to the stripes on the tape. The servo head is preferably maintained between adjacent stripes on the magnetic tape and signals detected from each of the adjacent stripes maintain head alignment by shifting the positioning of the head in either direction as needed.Type: GrantFiled: May 11, 1987Date of Patent: June 27, 1989Assignee: Exabyte CorporationInventors: Steven P. Georgis, Kelly J. Beavers, Steve E. Haugland