Method and system for automated termination and resumption in a time zero backup copy process

USRE37038E · kind E · reissue

Assignee

• International Business Machines Corporation · US

Inventors

• Lawrence E. Eastridge · Tucson, US
• Robert Frederic Kern · Tucson, US
• William Frank Micka · Tucson, US
• Claus William Mikkelsen · San Jose, US
• James Mitchell Ratliff · Corona de Tucson, US

Key dates

• Filing date: Aug 31, 1995
• Grant date: Jan 30, 2001
• Expiry date: Aug 31, 2015

Classification

• Technology area (CPC —): General

Abstract

A method in a data processing system for automatically terminating or resuming backup copy sessions after an abnormal interrupt or reset notification occurrence during a backup copy process. A status indication is entered into activity tables associated with a plurality of storage subsystems and devices within a data processing system in response to initiation of a backup copy session. Status indications are then entered upon successful completion of a backup copy session within the data processing system. The indications within the activity tables are reviewed to determine the status of a backup copy session upon restarting a resource manager, abnormal termination of a backup copy program, or an operating system initial program load. If a backup copy session has been initiated but not completed, the backup copy session is then terminated. The indications within the activity tables are also reviewed to determine the status of a backup copy session if a reset notification is raised by a storage subsystem. The tracks extents which are active for a volume associated with a particular session identification are determined. A comparison is then made between the tracks extents which are …