The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Sep. 19, 1995
Filed:
Dec. 30, 1993
Christopher H Bajorek, Los Gatos, CA (US);
Thomas W Glaser, Rochester, MN (US);
Klaas B Klaassen, San Jose, CA (US);
Charles R Nielsen, San Jose, CA (US);
George R Santana, Saratoga, CA (US);
Gordon J Smith, Rochester, MN (US);
David A Thompson, San Jose, CA (US);
International Business Machines Corporation, Armonk, NY (US);
Abstract
A disk drive power manager that compares energy usage with a predetermined profile to select one of several reduced-power operating modes. An energy usage register is updated at regular intervals according to the energy used during each time interval. An attenuated average energy usage value is obtained by attenuating the energy usage measures over time and integrating the results. The average energy level is compared with several predetermined energy threshold profiles to select a full- or reduced-power operating mode. Operating mode selection automatically adapts to the usage pattern to optimally balance power consumption with operational accessibility.