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:
Mar. 27, 2007
Filed:
Nov. 20, 2003
Frederick J. Carberry, Tucson, AZ (US);
Rufus J. Twito, Tucson, AZ (US);
James C. Chen, Tucson, AZ (US);
Richard A. Schaeffer, Antioch, CA (US);
Kaukab Uddin, Milpitas, CA (US);
Frederick J. Carberry, Tucson, AZ (US);
Rufus J. Twito, Tucson, AZ (US);
James C. Chen, Tucson, AZ (US);
Richard A. Schaeffer, Antioch, CA (US);
Kaukab Uddin, Milpitas, CA (US);
International Business Machines Corporation, Armonk, NY (US);
Abstract
A method of error management in a data storage system having a target device, with the target device receiving commands from a first initiator and the target device concurrently receiving commands from a second initiator. The target device is typically a storage device operating as a PPRC secondary. A first initiator is a device which communicates with the target device through small computer systems interface (SCSI) protocol. The first initiator is typically a host computer or server. The second initiator communicates with the target device through peer-to-peer remote copy PPRC initiator mode commands. The second initiator is typically a separate storage device in a peer-to-peer remote copy (PPRC) relationship with the target device. The method consists of managing errors associated with a command sent to the target device from the first initiator independently from the management of errors associated with a command sent to the target device from the second initiator.