Patents by Inventor Dung N. Dang
Dung N. Dang has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Patent number: 8761018Abstract: A fabric login (FLOGI) in a Fiber Channel (FC) adapter is throttled. The system includes a first tracking mechanism, a second tracking mechanism, a switch, and an FC adapter. The FC adapter comprises three or more FLOGIs and a controller. First and second FLOGI requests are transmitted to the switch and indicate, via a first tracking mechanism, that a first FLOGI associated with the first FLOGI request and a second FLOGI associated with the second FLOGI request are active. A third FLOGI request is queued until the first FLOGI request or the second FLOGI request is processed by the switch and indicates, via a second tracking mechanism, that a third FLOGI associated with a third FLOGI request is queued.Type: GrantFiled: May 25, 2012Date of Patent: June 24, 2014Assignee: International Business Machines CorporationInventors: Dung N. Dang, Steven E. Klein, Daniel W. Sherman
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Patent number: 8619574Abstract: A fabric login (FLOGI) in a Fibre Channel (FC) adapter is throttled by a system. The system includes a first tracking mechanism, a second tracking mechanism, a switch, and an FC adapter. The FC adapter comprises three or more FLOGIs and a controller.Type: GrantFiled: October 11, 2010Date of Patent: December 31, 2013Assignee: International Business Machines CorporationInventors: Dung N. Dang, Steven E. Klein, Daniel W. Sherman
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Publication number: 20120236721Abstract: A fabric login (FLOGI) in a Fibre Channel (FC) adapter is throttled. The system includes a first tracking mechanism, a second tracking mechanism, a switch, and an FC adapter. The FC adapter comprises three or more FLOGIs and a controller. First and second FLOGI requests are transmitted to the switch and indicate, via a first tracking mechanism, that a first FLOGI associated with the first FLOGI request and a second FLOGI associated with the second FLOGI request are active. A third FLOGI request is queued until the first FLOGI request or the second FLOGI request is processed by the switch and indicates, via a second tracking mechanism, that a third FLOGI associated with a third FLOGI request is queued.Type: ApplicationFiled: May 25, 2012Publication date: September 20, 2012Applicant: INTERNATIONAL BUSINESS MACHINES CORPORATIONInventors: Dung N. DANG, Steven E. KLEIN, Daniel W. SHERMAN
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Publication number: 20120110222Abstract: A method for dynamically enabling and disabling use of XFR_RDY is disclosed herein. In one embodiment of the invention, such a method includes receiving a write command at a target and determining whether XFR_RDY is enabled or disabled for the write command. In the event XFR_RDY is disabled, the method determines whether one or more buffers are available at the target. If at least one buffer is available, the method processes the write command by writing data associated with the write command to the one or more buffers. The method then returns information indicating the number of buffers that are still available at the target after completing the write command. A corresponding apparatus and computer program product are also disclosed and claimed herein.Type: ApplicationFiled: October 28, 2010Publication date: May 3, 2012Applicant: INTERNATIONAL BUSINESS MACHINES CORPORATIONInventors: Dung N. Dang, Matthew J. Kalos, Steven E. Klein, Daniel W. Sherman
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Publication number: 20120087242Abstract: Systems and methods for throttling a fabric login (FLOGI) in a Fibre Channel (FC) adapter are provided. One system includes a first tracking mechanism, a second tracking mechanism, a switch, and a FC adapter. The FC adapter comprises three or more FLOGIs and a controller configured to perform the below method. One method includes transmitting first and second FLOGI requests to the switch and indicating, via a first tracking mechanism, that a first FLOGI associated with the first FLOGI request and a second FLOGI associated with the second FLOGI request are active. The method further includes queuing a third FLOGI request until the first FLOGI request or the second FLOGI request is processed by the switch and indicating, via a second tracking mechanism, that a third FLOGI associated with the third FLOGI request is queued. Also provided are computer storage mediums including computer code for performing the above method.Type: ApplicationFiled: October 11, 2010Publication date: April 12, 2012Applicant: INTERNATIONAL BUSINESS MACHINES CORPORATIONInventors: Dung N. DANG, Steven E. KLEIN, Daniel W. SHERMAN
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Publication number: 20110063983Abstract: A method for verifying the integrity of a communication link is disclosed herein. In selected embodiments, such a method may include detecting, during normal operation of a communication link, a condition indicative of a high failure rate (HFR) on the communication link. The method may further include placing the communication link in an HFR state as a result of the condition. While in HFR state, the method may repeatedly transmit test I/Os over the communication link. The method may then automatically exit HFR state and resume normal operation on the communication link when one or more of the following has occurred: a selected number of test I/Os have been successfully transmitted over the communication link, and a number of test I/Os have been successfully transmitted over the communication link for a selected period of time. A corresponding system, apparatus, and computer program product are also disclosed and claimed herein.Type: ApplicationFiled: September 16, 2009Publication date: March 17, 2011Applicant: INTERNATIONAL BUSINESS MACHINES CORPORATIONInventors: Dung N. Dang, Daniel W. Fok, Steven E. Klein, Gail A. Spear
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Patent number: 7873744Abstract: System and computer program product are provided to configure a path between nodes through a fabric in a fibre channel storage area network (SAN). A node name is provided for a target node on the SAN and a port name is provided for each port in the target node. A relationship is established in a data structure between each port name and a slot in which each port is physically located in the target node. Prior to configuring a path between a source node and a port in the target node, the ports which are physically connected and logged in to the fabric are identified by port address. The port names corresponding to the port addresses are then identified. The port names are used to generate interface_ids of the ports corresponding to the physical slots in which the ports are located. A data structure is created to maintain the relationship between interface_ids and port names.Type: GrantFiled: May 8, 2008Date of Patent: January 18, 2011Assignee: International Business Machines CorporationInventors: James C. Chen, Patricia C. Lu, Chung M. Fung, Minh-Ngoc L. Huynh, Christopher M. Sansone, Dung N. Dang, Gail A. Spear, Richard A. Ripberger
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Patent number: 7523207Abstract: Methods, system and computer program product are provided to configure a path between nodes through a fabric in a fibre channel storage area network (SAN). A node name is provided for a target node on the SAN and a port name is provided for each port in the target node. A relationship is established in a data structure between each port name and a slot in which each port is physically located in the target node. Prior to configuring a path between a source node and a port in the target node, the ports which are physically connected and logged in to the fabric are identified by port address. The port names corresponding to the port addresses are then identified. The port names are used to generate interface_ids of the ports corresponding to the physical slots in which the ports are located. A data structure is created to maintain the relationship between interface_ids and port names.Type: GrantFiled: November 20, 2003Date of Patent: April 21, 2009Assignee: International Business Machines CorporationInventors: James C. Chen, Patricia C. Lu, Chung M. Fung, Minh-Ngoc L. Huynh, Christopher M. Sansone, Dung N. Dang, Gail A. Spear, Richard A. Ripberger
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Publication number: 20080205299Abstract: System and computer program product are provided to configure a path between nodes through a fabric in a fibre channel storage area network (SAN). A node name is provided for a target node on the SAN and a port name is provided for each port in the target node. A relationship is established in a data structure between each port name and a slot in which each port is physically located in the target node. Prior to configuring a path between a source node and a port in the target node, the ports which are physically connected and logged in to the fabric are identified by port address. The port names corresponding to the port addresses are then identified. The port names are used to generate interface_ids of the ports corresponding to the physical slots in which the ports are located. A data structure is created to maintain the relationship between interface_ids and port names.Type: ApplicationFiled: May 8, 2008Publication date: August 28, 2008Applicant: IBM CORPORATIONInventors: James C. Chen, Patricia C. Lu, Chung M. Fung, Minh-Ngoc L. Huynh, Christopher M. Sansone, Dung N. Dang, Gail A. Spear, Richard A. Ripberger