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:
Jul. 08, 2008
Filed:
May. 09, 2006
Shinjiro Shiraki, Ninomiya, JP;
Koji Nagata, Kaisei, JP;
Shinjiro Shiraki, Ninomiya, JP;
Koji Nagata, Kaisei, JP;
Hitachi, Ltd., Tokyo, JP;
Abstract
There is provided a command multiplex number monitoring control scheme capable of avoiding issue of a QF status and getting rid of system performance degradation without adding command processing resources. Command issue multiplex numbers CMs (32, 16 and 8) for WWN-LU, WWN-LUand WWN-LUare set in a port PTso as to be associated with the host bus adaptors HBAs in higher rank apparatuses HOST-, HOST-and HOST-. Denoting the sum total of command issue multiplex numbers CMs for respective set access permissions by (C), an access permission satisfying the relationship represented as 'command processing multiplex limit number (B)≧the sum total (C) of command issue multiplex numbers CMs for respective access permissions' is not permitted. Thus, the command issue multiplex numbers of the connected higher rank apparatuses are monitored.