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. 10, 2002
Filed:
Sep. 09, 1999
Mark A. Peloquin, Austin, TX (US);
Benedict Michael Rafanello, Round Rock, TX (US);
John Cameron Stiles, Round Rock, TX (US);
International Business Machines Corporation, Armonk, NY (US);
Abstract
A method for routing an input/output request for a particular logical volume. In a preferred embodiment, partitions are assigned to logical volumes, wherein an arbitrary number of partitions can be assigned to a logical volume and the partitions can be of an arbitrary size. Each logical volume is divided into a plurality of zones, wherein the zones for a particular logical volume are substantially equal in size. A zone table is created whose entries contain data about one or two partitions that correspond to that zone. Responsive to receiving an input/output request directed to a logical volume, the zone table entries for a first and a last sector listed in the input/output request are used to determine to which partitions in the logical volume the input/output request should be routed.