Patents by Inventor Roy Zeighami
Roy Zeighami 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: 9549488Abstract: A server rack holds a number of modular servers configured for liquid cooling by passing a liquid coolant through interiors of the servers. Failure management of the cooling system is by management of the servers in segregated fault domains. Each fault domain comprises a number of the servers serviced by a dedicated coolant circuit that is segregated from the cooling circuits of the other fault domains. Potential liquid coolant leaks in a specific fault domain can be identified by monitoring liquid coolant levels in the respective coolant circuits. Each fault domain can include a separate, dedicated heat exchanger and a separate, dedicated coolant reservoir.Type: GrantFiled: February 24, 2015Date of Patent: January 17, 2017Assignee: Cisco Technology, Inc.Inventors: Roy Zeighami, James Leach
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Patent number: 9201486Abstract: A data center system management device receives power configuration information for one or more power groups. Each power group has one or more servers. The power configuration information has a power group power limit for each power group. The power budgets are sent to server control units within each power group. Messages are received from each of the server control units, the messages including information to indicate whether servers in the power groups have a power deficit or a power surplus, and a number of power units for the power deficit and power surplus for each server. The server power budgets of the one or more servers in each of the one or more power groups based on power deficits and power surpluses within each power group using a priority based reallocation mechanism.Type: GrantFiled: February 23, 2012Date of Patent: December 1, 2015Assignee: Cisco Technology, Inc.Inventors: Praveen K. Jagadishprasad, Gururaja A. Nittur, Roy Zeighami, Antony J. Harvey
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Publication number: 20150173252Abstract: A server rack holds a number of modular servers configured for liquid cooling by passing a liquid coolant through interiors of the servers. Failure management of the cooling system is by management of the servers in segregated fault domains. Each fault domain comprises a number of the servers serviced by a dedicated coolant circuit that is segregated from the cooling circuits of the other fault domains. Potential liquid coolant leaks in a specific fault domain can be identified by monitoring liquid coolant levels in the respective coolant circuits. Each fault domain can include a separate, dedicated heat exchanger and a separate, dedicated coolant reservoir.Type: ApplicationFiled: February 24, 2015Publication date: June 18, 2015Inventors: Roy Zeighami, James Leach
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Patent number: 9055698Abstract: Flow measurement systems and methods are provided. A flow measurement system can include at least one heat-producing computing device having at least one fluid inlet and one fluid outlet. The system can further include at least one inlet fluid temperature sensor and at least one outlet fluid temperature sensor. At least one current sensor measuring the current supplied to at least a portion of the at least one heat-producing computing device can also be included with the system. The system can also include at least one calculating device adapted to calculate the inlet fluid flow rate based at least in part upon the sensed inlet fluid temperature, the sensed outlet fluid temperature, and the sensed current flow.Type: GrantFiled: February 26, 2010Date of Patent: June 9, 2015Assignee: Hewlett-Packard Development Company, L.P.Inventors: Brandon Rubenstein, Roy Zeighami
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Patent number: 9019704Abstract: Methods and means related to rejecting heat through thermal storage are provided. A heat sink includes internal cavities containing a phase-change material. Heat from a thermal load is rejected by flowing fluid coolant at a normal operating temperature. Failure of the fluid coolant system causes heat storage within the phase-change material at a temperature slightly greater than the normal operating temperature. Restoration of the fluid coolant system results in stored heat rejection and a return to a normal operating temperature. Normal operation of the thermal load can be performed while efforts are made to restore the fluid coolant system.Type: GrantFiled: August 27, 2009Date of Patent: April 28, 2015Assignee: Hewlett-Packard Development Company, L.P.Inventors: Brandon Rubenstein, Roy Zeighami
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Patent number: 9007221Abstract: A server rack holds a number of modular servers configured for liquid cooling by passing a liquid coolant through interiors of the servers. Failure management of the cooling system is by management of the servers in segregated fault domains. Each fault domain comprises a number of the servers serviced by a dedicated coolant circuit that is segregated from the cooling circuits of the other fault domains. Potential liquid coolant leaks in a specific fault domain can be identified by monitoring liquid coolant levels in the respective coolant circuits. Each fault domain can include a separate, dedicated heat exchanger and a separate, dedicated coolant reservoir.Type: GrantFiled: August 16, 2013Date of Patent: April 14, 2015Assignee: Cisco Technology, Inc.Inventors: Roy Zeighami, James Leach
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Publication number: 20150048950Abstract: A server rack holds a number of modular servers configured for liquid cooling by passing a liquid coolant through interiors of the servers. Failure management of the cooling system is by management of the servers in segregated fault domains. Each fault domain comprises a number of the servers serviced by a dedicated coolant circuit that is segregated from the cooling circuits of the other fault domains. Potential liquid coolant leaks in a specific fault domain can be identified by monitoring liquid coolant levels in the respective coolant circuits. Each fault domain can include a separate, dedicated heat exchanger and a separate, dedicated coolant reservoir.Type: ApplicationFiled: August 16, 2013Publication date: February 19, 2015Applicant: Cisco Technology, Inc.Inventors: Roy Zeighami, James Leach
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Publication number: 20130226362Abstract: A data center system management device receives power configuration information for one or more power groups. Each power group has one or more servers. The power configuration information has a power group power limit for each power group. The power budgets are sent to server control units within each power group. Messages are received from each of the server control units, the messages including information to indicate whether servers in the power groups have a power deficit or a power surplus, and a number of power units for the power deficit and power surplus for each server. The server power budgets of the one or more servers in each of the one or more power groups based on power deficits and power surpluses within each power group using a priority based reallocation mechanism.Type: ApplicationFiled: February 23, 2012Publication date: August 29, 2013Applicant: CISCO TECHNOLOGY, INC.Inventors: Praveen K. Jagadishprasad, Gururaja A. Nittur, Roy Zeighami, Antony J. Harvey
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Publication number: 20120331477Abstract: A system and method are disclosed for dynamically allocating high-quality and low-quality facility assets at the datacenter level. The system and method provide an actuator with information on priorities of information technology (IT) workloads. The actuator ranks the IT workloads according to their priorities, monitors an amount of resources the IT workloads demand, and tracks total capacities of facility assets in the datacenter. The facility assets include high-quality facility assets and low-quality facility assets. According to the direction of the actuator, a distribution mechanism dynamically switches lower priority IT workloads from the high-quality facility assets to the low-quality facility assets when the high-quality facility assets are overburdened.Type: ApplicationFiled: February 18, 2010Publication date: December 27, 2012Inventors: Roy Zeighami, Thomas Edwin Turicchi, JR.
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Publication number: 20120325013Abstract: Flow measurement systems and methods are provided. A flow measurement system can include at least one heat-producing computing device (160) having at least one fluid inlet (120) and one fluid outlet (130). The system can further include at least one inlet fluid inlet temperature sensor (140) and at least one outlet fluid temperature sensor (150). At least one current sensor (160) measuring the current supplied to at least a portion of the at least one heat-producing computing device (110) can also be included with the system (100). The system can also include at least one calculating device (180) adapted to calculate the inlet fluid flow rate based at least in part upon the sensed inlet fluid temperature, the sensed outlet fluid temperature, and the sensed current flow.Type: ApplicationFiled: February 26, 2010Publication date: December 27, 2012Inventors: Brandon Rubenstein, Roy Zeighami
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Patent number: 8203837Abstract: According to an embodiment of the present invention, there is provided a system for cooling. The system comprises an equipment rack installable in a facility and for accommodating a plurality of electronic equipment. The system further comprises an exhaust duct into which the electronic equipment, when installed in the rack, exhausts gas drawn from a first section of a facility. The system further comprises a gas flow meter for measuring gas flow in the exhaust duct, and a controller for generating control signals to control, based on the measured gas flow, the output of a cooling unit arranged to provide cooled gas to the first section of the facility.Type: GrantFiled: March 31, 2010Date of Patent: June 19, 2012Assignee: Hewlett-Packard Developmet Company, L.P.Inventors: Roy Zeighami, Robert Lankston
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Publication number: 20120125573Abstract: Methods and means related to rejecting heat through thermal storage are provided. A heat sink includes internal cavities containing a phase-change material. Heat from a thermal load is rejected by flowing fluid coolant at a normal operating temperature. Failure of the fluid coolant system causes heat storage within the phase-change material at a temperature slightly greater than the normal operating temperature. Restoration of the fluid coolant system results in stored heat rejection and a return to a normal operating temperature. Normal operation of the thermal load can be performed while efforts are made to restore the fluid coolant system.Type: ApplicationFiled: August 27, 2009Publication date: May 24, 2012Inventors: Brandon Rubenstein, Roy Zeighami
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Publication number: 20120039036Abstract: A cooling system for a blade enclosure is disclosed. The cooling system comprises a thermal bus bar (TBB) 1220 positioned in the middle of the blade enclosure. The TBB 122 has a front face and a back face. When blades are inserted into the blade enclosure, a heat transfer plate 584 on the blade makes thermal contact with either the front or back face of the TBB 122. The TBB 122 is cooled, thereby cooling the blades.Type: ApplicationFiled: October 30, 2009Publication date: February 16, 2012Inventors: Michael R. Krause, Brandon Rubenstein, Roy Zeighami, Fred B. Worley
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Publication number: 20110242755Abstract: According to an embodiment of the present invention, there is provided a system for cooling. The system comprises an equipment rack installable in a facility and for accommodating a plurality of electronic equipment. The system further comprises an exhaust duct into which the electronic equipment, when installed in the rack, exhausts gas drawn from a first section of a facility. The system further comprises a gas flow meter for measuring gas flow in the exhaust duct, and a controller for generating control signals to control, based on the measured gas flow, the output of a cooling unit arranged to provide cooled gas to the first section of the facility.Type: ApplicationFiled: March 31, 2010Publication date: October 6, 2011Inventors: Roy Zeighami, Robert Lankston
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Publication number: 20110085296Abstract: A cooling system for a computer blade is disclosed. The cooling system comprises a main printed circuit (PC) board with at least one component mounted on a top side of the main PC board. A heat transfer plate is located at the first end of the main PC board. An airflow divider is mounted on, and is perpendicular with, the top side of the main PC board. The airflow divider runs in an axis generally parallel with the first side of the main PC board. A lid is coupled to the main PC board thereby enclosing the main PC board, the heat transfer plate and the airflow divider. The lid encloses a first airflow channel running along the first side of the main PC board and a second airflow channel running along the second side of the main PC board. A fan is located on top side of the main PC board in the first airflow channel. The fan is configured to re-circulate air from the second airflow channel through the first airflow channel, past the heat transfer plate, and then back into the second airflow channel.Type: ApplicationFiled: October 14, 2009Publication date: April 14, 2011Inventors: Brandon Rubenstein, Fred B. Worley, Roy Zeighami, Michael R. Krause
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Publication number: 20060232932Abstract: Embodiments include apparatus, methods, and systems providing a heatsink for electronic heat generating components. In one embodiment, the heatsink includes a metal base having a plurality of grooves, and a plurality of graphite fins connected to the base. The fins thermally dissipate heat from the base and into a surrounding environment. The fins are secured within the grooves with an interference fit produced by thermally expanding the base.Type: ApplicationFiled: April 15, 2005Publication date: October 19, 2006Inventors: Robert Curtis, Roy Zeighami, Christian Belady, Brent Boudreaux
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Publication number: 20060236162Abstract: One embodiment is a method of correcting errors in a memory subsystem in a computer system. The method comprises monitoring occurrence of correctable memory errors; responsive to the monitoring, determining whether a risk of occurrence of an uncorrectable memory error is less than a tolerable risk; and responsive to a determination that the risk of occurrence of an uncorrectable memory error is not less than a tolerable risk, adjusting at least one system level parameter to decrease the occurrence of correctable memory errors.Type: ApplicationFiled: April 15, 2005Publication date: October 19, 2006Inventors: Roy Zeighami, Brian Johnson
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Patent number: 7120022Abstract: A loop thermosyphon system has a semiconductor die with a plurality of microchannels. A condenser is in fluid communication with the microchannels. A wicking structure wicks fluid between the condenser to the semiconductor die.Type: GrantFiled: March 24, 2004Date of Patent: October 10, 2006Assignee: Hewlett-Packard Development Company, LP.Inventors: Christian L. Belady, Roy Zeighami
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Publication number: 20060085616Abstract: One embodiment is a method of dynamically adjusting a rate at which a dynamic random access memory (“DRAM”) module is refreshed in a computer system. The method comprises monitoring a plurality of system conditions; detecting a change in at least one of the monitored system conditions; responsive to the detection, determining an optimum refresh rate for a current state of the computer system; and setting the refresh rate to the determined optimum refresh rate.Type: ApplicationFiled: October 20, 2004Publication date: April 20, 2006Inventors: Roy Zeighami, Brian Johnson, John Wastlick, David Soper
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Publication number: 20060048932Abstract: Systems, methodologies, media, and other embodiments associated with a configurable heat sink are described. One exemplary system embodiment includes a base portion of a heat sink to which different accessories may be removably attached. The example system may include a first accessory like a cover that forms an assembly with the base portion of the heat sink and causes the assembly to operate in a first manner.Type: ApplicationFiled: September 9, 2004Publication date: March 9, 2006Inventors: Brandon Rubenstein, Stephan Barsun, Christian Belady, Gregory Huff, Christopher Malone, Roy Zeighami