Patents by Inventor Toshimi Ataku

Toshimi Ataku 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).

  • Method and system for adjusting a magnetic tape head
    Patent number: 7016136
    Abstract: A method of adjusting a magnetic head of the invention includes the steps of: setting a cleaning cartridge into a drive unit; identifying the set cartridge as the cleaning cartridge by checking a cleaning bit in a non-volatile memory; performing an adjustment-operation after a cleaning operation when the set cartridge is identified as the cleaning cartridge; and reading out a pattern signal from a predetermined segment of the magnetic tape held in the cleaning cartridge.
    Type: Grant
    Filed: February 18, 2003
    Date of Patent: March 21, 2006
    Assignee: International Business Machines Corporation
    Inventors: Toshiyuki Shiratori, Toshimi Ataku, Tomoaki Kimura
  • Data set information for recovery of synchronized data on magnetic tape
    Patent number: 6865043
    Abstract: Special fields for error recovery are provided in data set information tables of data sets written with synchronized transactions. If a transaction only partially fills a data set, that data set is rewritten in a succeeding data set, appending the next transaction. A moving access point in the table identifies the appended transaction, allowing the rewritten transaction to be skipped during read recovery. The table provides recovery trails by providing a thread to tie the data sets together, the status of the data set, and pointers, such as identifying the wrap of the immediately succeeding data set.
    Type: Grant
    Filed: November 14, 2002
    Date of Patent: March 8, 2005
    Assignee: International Business Machines Corporation
    Inventors: Toshimi Ataku, Paul Merrill Greco, Hiroshi Itagaki, Glen Alan Jaquette, Hironobu Nagura, Toshiyuki Shiratori
  • Cleaning cartridge, drive unit, method of adjusting magnetic head, and magnetic recording system
    Publication number: 20030169529
    Abstract: A method of adjusting a magnetic head of the invention includes the steps of: setting a cleaning cartridge into a drive unit; identifying the set cartridge as the cleaning cartridge by checking a cleaning bit in a non-volatile memory; performing an adjustment-operation after a cleaning operation when the set cartridge is identified as the cleaning cartridge; and reading out a pattern signal from a predetermined segment of the magnetic tape held in the cleaning cartridge.
    Type: Application
    Filed: February 18, 2003
    Publication date: September 11, 2003
    Applicant: International Business Machines Corp.
    Inventors: Toshiyuki Shiratori, Toshimi Ataku, Tomoaki Kimura
  • Data set information for recovery of synchronized data on magnetic tape
    Publication number: 20030142429
    Abstract: Special fields for error recovery are provided in data set information tables of data sets written with synchronized transactions. If a transaction only partially fills a data set, that data set is rewritten in a succeeding data set, appending the next transaction. A moving access point in the table identifies the appended transaction, allowing the rewritten transaction to be skipped during read recovery. The table provides recovery trails by providing a thread to tie the data sets together, the status of the data set, and pointers, such as identifying the wrap of the immediately succeeding data set.
    Type: Application
    Filed: November 14, 2002
    Publication date: July 31, 2003
    Applicant: International Business Machines Corporation
    Inventors: Toshimi Ataku, Paul Merrill Greco, Hiroshi Itagaki, Glen Alan Jaquette, Hironobu Nagura, Toshiyuki Shiratori