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:
Mar. 31, 2009
Filed:
Nov. 20, 2003
Ezequiel Cervantes, Tucson, AZ (US);
Juan A. Coronado, Tucson, AZ (US);
Miguel A. Duanas, Tucson, AZ (US);
David P. Goodman, Loveland, CO (US);
Matthew J. Kalos, Tucson, AZ (US);
Donald M. Nordahl, Tucson, AZ (US);
Richard A. Ripberger, Tucson, AZ (US);
Ezequiel Cervantes, Tucson, AZ (US);
Juan A. Coronado, Tucson, AZ (US);
Miguel A. Duanas, Tucson, AZ (US);
David P. Goodman, Loveland, CO (US);
Matthew J. Kalos, Tucson, AZ (US);
Donald M. Nordahl, Tucson, AZ (US);
Richard A. Ripberger, Tucson, AZ (US);
International Business Machines Corporation, Armonk, NY (US);
Abstract
A method to control access to logical volumes. The method provides a plurality of host computers and an information storage and retrieval system comprising a plurality of logical volumes. The method forms (N) host computer groups, assigns one or more of the host computers to the (i)th host computer group, such that each host computer assigned to (i)th host computer group is not assigned to any other of the (N) host computer groups. The method forms (N) logical volume groups, assigns one or more logical volumes to the (i)th logical volume group, such that each of the logical volumes assigned to the (i)th logical volume group is not assigned to any other of the (N) logical volume groups. The method maintains a database associating the (i)th host computer group with the (i)th logical volume group, and permits a host computer assigned to the (i)th host computer group to access a logical volume assigned to the (i)th logical volume group.