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:
Oct. 11, 2005
Filed:
Oct. 13, 2000
John T. Flynn Jr., Morgan Hill, CA (US);
Richard H. Johnson, Cupertino, CA (US);
Limei M. Shaw, San Jose, CA (US);
John T. Flynn Jr., Morgan Hill, CA (US);
Richard H. Johnson, Cupertino, CA (US);
Limei M. Shaw, San Jose, CA (US);
International Business Machines Corporation, Armonk, NY (US);
Abstract
A method and apparatus for providing multi-path I/O in non-concurrent clustering environment is disclosed. Shared non-concurrent access to logical volumes through multiple paths is provided by using SCSI-3 persistent reserve commands. Open options of the operating system are mapped to SCSI persistent reserve commands to allow all of the multiple paths to register with the logical unit number of the shared storage system and to allow the second of the multiple paths to access the logical unit number of the shared storage system after obtaining a persistent reservation with the shared storage system.