Patents by Inventor Motoko Oe

Motoko Oe 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).

  • Patent number: 8756351
    Abstract: A tape drive, tape drive recording system, and method are provided for improving tape speed selection during data transfer. The tape drive includes a buffer, a tape for recording the data to be temporarily stored in the buffer, and a read head. The tape drive further includes a reading controller that initially sets a tape speed such that a drive transfer rate matches a host transfer rate as closely as possible and that drives the tape at the tape speed. To address backhitching caused by one or more host transfer halts, the reading controller subsequently adjusts the tape speed such that the drive transfer rate is lower than the host transfer rate by recalculating the host transfer rate in consideration of the host transfer and the host transfer halt and setting the tape speed such that the drive transfer rate matches the recalculated host transfer rate as closely as possible.
    Type: Grant
    Filed: July 27, 2012
    Date of Patent: June 17, 2014
    Assignee: International Business Machines Corporation
    Inventors: Takashi Katagiri, Hirokazu Nakayama, Motoko Oe, Yutaka Oishi
  • Patent number: 8316162
    Abstract: A tape drive, tape drive recording system, and method are provided for improving tape speed selection during data transfer. The tape drive comprises a buffer, a tape for recording the data to be temporarily stored in the buffer, and a read head. The tape drive further comprises a reading controller that initially sets a tape speed such that a drive transfer rate matches a host transfer rate as closely as possible and that drives the tape at the tape speed. To address backhitching caused by one or more host transfer halts, the reading controller subsequently adjusts the tape speed such that the drive transfer rate is lower than the host transfer rate by recalculating the host transfer rate in consideration of the host transfer and the host transfer halt and setting the tape speed such that the drive transfer rate matches the recalculated host transfer rate as closely as possible.
    Type: Grant
    Filed: October 6, 2009
    Date of Patent: November 20, 2012
    Assignee: International Business Machines Corporation
    Inventors: Takashi Katagiri, Hirokazu Nakayama, Motoko Oe, Yutaka Oishi
  • Publication number: 20120290784
    Abstract: A tape drive, tape drive recording system, and method are provided for improving tape speed selection during data transfer. The tape drive includes a buffer, a tape for recording the data to be temporarily stored in the buffer, and a read head. The tape drive further includes a reading controller that initially sets a tape speed such that a drive transfer rate matches a host transfer rate as closely as possible and that drives the tape at the tape speed. To address backhitching caused by one or more host transfer halts, the reading controller subsequently adjusts the tape speed such that the drive transfer rate is lower than the host transfer rate by recalculating the host transfer rate in consideration of the host transfer and the host transfer halt and setting the tape speed such that the drive transfer rate matches the recalculated host transfer rate as closely as possible.
    Type: Application
    Filed: July 27, 2012
    Publication date: November 15, 2012
    Applicant: INTERNATIONAL BUSINESS MACHINES CORPORATION
    Inventors: Takashi Katagiri, Hirokazu Nakayama, Motoko Oe, Yutaka Oishi
  • Publication number: 20120079185
    Abstract: A tape storage system according to one embodiment includes two or more tape storage apparatuses each having a buffer divided in fixed-length segments, and being connectable to a host, where a first of the tape storage apparatuses is configured to receive multiple data clusters and a synchronization request from a host, and, when one of the segments of the buffer is accumulated and filled with the data, to write the accumulated data onto a tape. A second of the tape storage apparatuses is connected to the first tape storage apparatus, the second tape storage apparatus being configured to receive the multiple data clusters sent from the host via the first tape storage apparatus, and being configured to write a predetermined number of data clusters accumulated in the segments thereof onto a second tape at a timing corresponding to the synchronization request.
    Type: Application
    Filed: June 15, 2010
    Publication date: March 29, 2012
    Applicant: INTERNATIONAL BUSINESS MACHINES CORPORATION
    Inventors: Atsushi Abe, Takashi Katagiri, Motoko Oe, Setsuko Masuda, Yutaka Oishi, Noriko Yamamoto, Katsumi Yoshimura
  • Patent number: 8035912
    Abstract: A system and method for controlling the traveling of a tape is provided. The system and method include passing data in a buffer to a channel input/output unit for writing the data to a tape. A determining unit determines if second data is to be written to the tape without performing a backhitch after first data is written to the tape. The determination unit also determines a state of the system before writing the first data to the tape and compares an amount of second data written to the tape prior to writing first data to the tape with an amount of second data expected to be written to the tape to an area up to a position on the tape where writing the first data commenced, for determining if the second data is to be written to the tape without performing a backhitch. A speed adjusting unit adjusts the speed of the tape to prevent a backhitch due to the buffer running out of data when the determination unit determines that the second data is to be written to the tape without performing a backhitch.
    Type: Grant
    Filed: May 29, 2009
    Date of Patent: October 11, 2011
    Assignee: International Business Machines Corporation
    Inventors: Takashi Katagiri, Motoko Oe
  • Patent number: 7995303
    Abstract: Various embodiments for writing received synchronized data to magnetic tape having a plurality of wraps using a magnetic tape drive adapted for performing the writing according to an available plurality of predefined tape speeds are provided. In one such embodiment, for each of the available plurality of predefined tape speeds, an average overhead per synchronized command for performing a recursively accumulated backhitchless flush (RABF) cycle is calculated. One of the available plurality of predefined tape speeds having a lowest calculated average overhead is selected. The RABF cycle is performed using the selected one of the available plurality of predefined tape speeds.
    Type: Grant
    Filed: August 31, 2009
    Date of Patent: August 9, 2011
    Assignee: International Business Machines Corporation
    Inventors: James M. Karp, Takashi Katagiri, Motoko Oe, Yutaka Oishi
  • Patent number: 7903363
    Abstract: A method to write information to a tape storage medium by disposing a tape storage medium in a tape drive apparatus comprising a write head. The method moves the tape storage medium in a first direction, writes data from a buffer to the tape storage medium, and thereby empties the buffer while the tape storage medium is moving in the first direction. The method determines, while the tape storage medium is moving in the first direction, whether to enable a backhitchless write wherein the tape storage medium is not stopped and moved in a second and opposition direction, prior to writing new data to the tape storage medium. By not stopping the movement of the tape storage medium, and by not moving the tape storage medium in a reverse direction to reposition the write head, the method eliminates the time overhead required to stop the tape and reposition the tape head. Applicants' method achieves this time efficiency without adverse impact to the nominal storage capacity of the tape information medium.
    Type: Grant
    Filed: June 5, 2008
    Date of Patent: March 8, 2011
    Assignee: International Business Machines Corporation
    Inventors: Hiroshi Itagaki, James Mitchell Karp, Takashi Katagiri, Motoko Oe, Yutaka Ooishi
  • Publication number: 20110051280
    Abstract: Various embodiments for writing received synchronized data to magnetic tape having a plurality of wraps using a magnetic tape drive adapted for performing the writing according to an available plurality of predefined tape speeds are provided. In one such embodiment, for each of the available plurality of predefined tape speeds, an average overhead per synchronized command for performing a recursively accumulated backhitchless flush (RABF) cycle is calculated. One of the available plurality of predefined tape speeds having a lowest calculated average overhead is selected. The RABF cycle is performed using the selected one of the available plurality of predefined tape speeds.
    Type: Application
    Filed: August 31, 2009
    Publication date: March 3, 2011
    Applicant: INTERNATIONAL BUSINESS MACHINES CORPORATION
    Inventors: James M. KARP, Takashi KATAGIRI, Motoko OE, Yutaka OISHI
  • Publication number: 20100095029
    Abstract: A tape drive, tape drive recording system, and method are provided for improving tape speed selection during data transfer. The tape drive comprises a buffer, a tape for recording the data to be temporarily stored in the buffer, and a read head. The tape drive further comprises a reading controller that initially sets a tape speed such that a drive transfer rate matches a host transfer rate as closely as possible and that drives the tape at the tape speed. To address backhitching caused by one or more host transfer halts, the reading controller subsequently adjusts the tape speed such that the drive transfer rate is lower than the host transfer rate by recalculating the host transfer rate in consideration of the host transfer and the host transfer halt and setting the tape speed such that the drive transfer rate matches the recalculated host transfer rate as closely as possible.
    Type: Application
    Filed: October 6, 2009
    Publication date: April 15, 2010
    Applicant: INTERNATIONAL BUSINESS MACHINES CORPORATION
    Inventors: Takashi Katagiri, Hirokazu Nakayama, Motoko Oe, Yutaka Oishi
  • Publication number: 20090303633
    Abstract: A method to write information to a tape storage medium by disposing a tape storage medium in a tape drive apparatus comprising a write head. The method moves the tape storage medium in a first direction, writes data from a buffer to the tape storage medium, and thereby empties the buffer while the tape storage medium is moving in the first direction. The method determines, while the tape storage medium is moving in the first direction, whether to enable a backhitchless write wherein the tape storage medium is not stopped and moved in a second and opposition direction, prior to writing new data to the tape storage medium. By not stopping the movement of the tape storage medium, and by not moving the tape storage medium in a reverse direction to reposition the write head, the method eliminates the time overhead required to stop the tape and reposition the tape head. Applicants' method achieves this time efficiency without adverse impact to the nominal storage capacity of the tape information medium.
    Type: Application
    Filed: June 5, 2008
    Publication date: December 10, 2009
    Applicant: INTERNATIONAL BUSINESS MACHINES CORPORATION
    Inventors: Hiroshi Itagaki, James Mitchell Karp, Takashi Katagiri, Motoko Oe, Yutaka Ooishi
  • Publication number: 20090296268
    Abstract: A system and method for controlling the traveling of a tape is provided. The system and method include passing data in a buffer to a channel input/output unit for writing the data to a tape. Once the data is written to the tape, a determining unit determines whether or not to perform backhitchless writing. If backhitchless writing is to be performed, then a speed determining unit determines a tape speed, where the time of data transfer from a host to the buffer is less than the time of data writing from the buffer to the tape. Thereafter, an operation signal output unit instructs a motor driver to change the speed of the tape to the determined tape speed after a backhitch is performed is a speculative FM.
    Type: Application
    Filed: May 29, 2009
    Publication date: December 3, 2009
    Applicant: International Business Machines Corporation
    Inventors: Takashi Katagiri, Motoko Oe