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:
May. 19, 2009
Filed:
Nov. 22, 2004
Matthew D. Bomhoff, Tucson, AZ (US);
Brian J. Cagno, Tucson, AZ (US);
John C. Elliott, Tucson, AZ (US);
Carl E. Jones, Tucson, AZ (US);
Robert A. Kubo, Tucson, AZ (US);
Gregg S. Lucas, Tucson, AZ (US);
Matthew D. Bomhoff, Tucson, AZ (US);
Brian J. Cagno, Tucson, AZ (US);
John C. Elliott, Tucson, AZ (US);
Carl E. Jones, Tucson, AZ (US);
Robert A. Kubo, Tucson, AZ (US);
Gregg S. Lucas, Tucson, AZ (US);
International Business Machines Corporation, Armonk, NY (US);
Abstract
A method is disclosed to set the signaling rate of a switch domain disposed in an information storage and retrieval system. The method establishes a switch domain target operating speed, and determines if that switch domain target operating speed comprises a first signaling rate. If the switch domain target operating speed comprises a first signaling rate, then the method asserts first Device Control Code bits to each of the plurality of data storage devices, and each of the plurality of data storage devices communicates with the switch using that first signaling rate. If the switch domain target operating speed does not comprise the first signaling rate, then the method asserts second Device Control Code bits to each of the plurality of data storage devices, and each of the plurality of data storage devices communicates with the switch using a second signaling rate.