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:
May. 20, 2014
Filed:
Sep. 29, 2011
Mitsutoshi Jinno, Yamato, JP;
Hiroyuki Miyoshi, Yamato, JP;
Yoshihiko Terashita, Yamato, JP;
International Business Machines Corporation, Armonk, NY (US);
Abstract
In a path determination unit of a SAS expander connected to a SAS initiator and connected via first and second paths to a SAS target, an SSP controller receives an SSP command frame received from the SAS initiator; a requested-data-length manager stores a requested data length of the SSP command frame in a requested-data-length storage unit; and a data-transfer-amount manager selects one of the first and second paths having a smaller one of the data transfer amounts stored in a data-transfer-amount storage unit, and adds the requested data length to the data transfer amount of the selected path. The SSP command frame is transmitted to the SAS target via the selected path. Upon receipt of an SSP response frame responding thereto, the requested data length is deleted from the requested-data-length storage unit, and the requested data length is subtracted from the data transfer amount of the selected path.