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:
Feb. 17, 2009
Filed:
Mar. 05, 2004
Angqin Bai, Tucson, AZ (US);
Alex Q. Chen, Tucson, AZ (US);
Theodore T. Harris, Jr., Tucson, AZ (US);
Carol S. Mellgren, Tucson, AZ (US);
Edwin K. Scott, Tucson, AZ (US);
Gail A. Spear, Tucson, AZ (US);
Angqin Bai, Tucson, AZ (US);
Alex Q. Chen, Tucson, AZ (US);
Theodore T. Harris, Jr., Tucson, AZ (US);
Carol S. Mellgren, Tucson, AZ (US);
Edwin K. Scott, Tucson, AZ (US);
Gail A. Spear, Tucson, AZ (US);
International Business Machines Corporation, Armonk, NY (US);
Abstract
Tracks of data or other data units are copied from a primary storage system to a secondary storage system. For multiple-track or multiple-data unit transfers, a group of tracks or data units which are sequentially related are transferred. A respective task is defined at the primary storage system for monitoring a progress of the transfer of each of the respective data units in a group. A state is maintained for monitoring a progress of the transfer of the group responsive to the progress of each of the tasks. A normal state is selected when there are no failed tasks. A recovery state is selected when there is a failure, and the status of the remaining tasks is being ascertained. A retry state is selected following the recovery state to retry the failed tasks. A failed state indicates an unrecoverable failure.