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. 04, 2014
Filed:
Apr. 20, 2012
Kiran K Anumalasetty, Bangalore, IN;
Nicholas S Ham, Austin, TX (US);
Purna Chandra Jasti, Madhapur, IN;
Sudhir Maddali, Hyderabad, IN;
Yadagiri Rajaboina, Madhapur, IN;
Sanket Rathi, Hyderabad, IN;
Kiran K Anumalasetty, Bangalore, IN;
Nicholas S Ham, Austin, TX (US);
Purna Chandra Jasti, Madhapur, IN;
Sudhir Maddali, Hyderabad, IN;
Yadagiri Rajaboina, Madhapur, IN;
Sanket Rathi, Hyderabad, IN;
International Business Machines Corporation, Armonk, NY (US);
Abstract
A method is disclosed for retrieving the reservation status information of a storage area network (SAN) device, a host transmits a persistent reservation in command with service action setting of 'read reservation' to a first LUN, wherein the host is connected to a port of the data storage server to which the LUN belongs. The host receives a message from the LUN. The host determines that the message is a success. The host sends to the LUN a persistent reservation in command with service action setting of 'read keys', responsive to a success message. The host determines that the LUN responds with a zero data length. The host determines the LUN is reserved with type 2 reservation, responsive to a determination that the LUN responds with a non-zero data length.