Patent Number: 7,823,008

Title: Maintaining consistency in a remote copy data storage system

Abstract: An apparatus configured to operate as a primary for a remote copy pair is provided. The apparatus comprises a journal component at said primary for generating journal entries for one or more uncompleted sequenced batches; a configurator responsive to an error indication from a secondary for enumeration of said one or more uncompleted sequenced batches; and a primary server responsive to said enumeration of said one or more uncompleted sequenced batches to reissue to said secondary one or more write requests for said one or more uncompleted sequenced batches, during recovery processing.

Inventors: Burr; Dale (Hampshire, GB), Butterworth; Henry Esmond (Hampshire, GB), Fuente; Carlos Francisco (Hampshire, GB), Scales; William James (Hampshire, GB)

Assignee: International Business Machines Corporation

International Classification: G06F 11/00 (20060101)

Expiration Date: 2018-10-26 0:00:00