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:
Aug. 28, 2012
Filed:
Jul. 22, 2009
William Patrick Delaney, Wichita, KS (US);
Kenneth F. Day, Tucson, AZ (US);
William Patrick Delaney, Wichita, KS (US);
Kenneth F. Day, Tucson, AZ (US);
Netapp, Inc., Sunnyvale, CA (US);
Abstract
A non-disruptive method for updating firmware in a first controllerof a redundant controllerin a storage subsystemis disclosed. This updating occurs while the storage subsystempresents data to a host systemin response to a host request. During the non-disruptive updating, the updating first controllerredirects the host requestfor data, e.g., drive-A volumenormally owned by the first controller, to second controllerof the redundant controller. After the second controllerobtains dataidentified in the host request, the operating second controllertransfers the datato the updating first controllervia an inter-controller channel. Once the updating first controllerreceives the data, the first controllerpresents the datato the host system. The host systemdoes not detect that the first controlleris updating because the updating process is invisible to the host system. The above process is also applied when the updating is simply a reboot command for the first controller