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:
Jan. 05, 2021
Filed:
Mar. 26, 2019
International Business Machines Corporation, Armonk, NY (US);
Scott B. Compton, Hyde Park, NY (US);
Matthew R. Craig, Sahuarita, AZ (US);
Clint A. Hardy, Tucson, AZ (US);
Matthew J. Kalos, Tucson, AZ (US);
Carol S. Mellgren, Tucson, AZ (US);
John G. Thompson, Tucson, AZ (US);
International Business Machines Corporation, Armonk, NY (US);
Abstract
One general aspect of device reservation state preservation in accordance with the present description, provides for an intermediate reservation state, referred to herein as a 'peer' reservation state, which may be maintained by a storage controller in the event of a total loss of communication connectivity to the reserving host so long as a peer or partner storage controller of a mirror relationship still has communication connectivity to the host. The peer reservation state as used herein, is a reservation state intermediate between a full reservation state for a device, and a fully released state in which a reservation of the device has been completely released. Other features and aspects may be realized, depending upon the particular application.