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. 30, 2004
Filed:
Mar. 15, 2001
Barry J. Oldfield, Boise, ID (US);
Christopher W. Johansson, Horseshoe Bend, ID (US);
Hewlett-Packard Development Company, L.P., Houston, TX (US);
Abstract
A redundant controller data storage system having an on-line controller removal system and method is described. In one aspect, the method of on-line removal of a controller from a redundant controller system according to the present invention includes the redundant controller system having a first controller and a second controller. Partial removal of the first controller from the redundant controller system is detected. A shut-down sequence is performed on the first controller and the second controller, including completing outstanding memory accesses. The first controller is defined to have a first memory, and the first memory is placed into a self-refresh mode. Removal of the first controller from the redundant controller system is finished.