Device reservation management for overcoming communication path disruptions

US10613946B2 · kind B2 · utility

Assignee

• International Business Machines Corporation · US

Inventors

• Scott B. Compton · Hyde Park, US
• Matthew R. Craig · Sahuarita, US
• Clint A. Hardy · Tucson, US
• Tri M. Hoang · Clifton, US
• Matthew J. Kalos · Tucson, US
• John G. Thompson · Tucson, US
• Harry M. Yudenfriend · Poughkeepsie, US

Key dates

• Filing date: Nov 30, 2017
• Grant date: Apr 7, 2020
• Expiry date: Apr 28, 2038

Classification

• Technology area (CPC H): Electricity
• CPC primary: H04L67/1097
• WIPO field: Computer technology
• WIPO sector: Electrical engineering

Abstract

One general aspect of device reservation management in accordance with the present description, is directed to a host issuing I/O data requests to a primary device which synchronously mirrors data to a secondary data storage device wherein both devices are reserved for exclusive use by the host for I/O data requests. In response to a loss of communication connectivity on all paths to the primary storage controller controlling the primary device, the host confirms whether a communication path to the primary device has been established and whether the primary device remains reserved to the host. Upon successful confirmations, the reservation of the primary device is repaired such that I/O data requests to the reserved primary device continue. Other features and aspects may be realized, depending upon the particular application.