David G Allender

US Patent:

D2767961, Dec 18, 1984

Filed:

Jul 2, 1981

Appl. No.:

6/279870

Inventors:

David G. Allender - San Mateo CA

US Classification:

D10 56

US Patent:

40300285, Jun 14, 1977

Filed:

Aug 13, 1975

Appl. No.:

5/604307

Inventors:

David G. Allender - San Mateo CA

International Classification:

G01R 2702

US Classification:

324 65R

Abstract:

A method and apparatus for sensing the presence and quantity of conductive particles in an oil flow system is disclosed which method and apparatus is based on a novel sensor element comprising a planar array of a plurality of electrically conductive surfaces interconnected with a plurality of series connected resistor elements. Electronic circuitry for use in combination with the sensor element is described. Preferred embodiments of the sensor element and preferred combinations of sensor element and electronic circuitry are disclosed.

US Patent:

20180267874, Sep 20, 2018

Filed:

May 24, 2018

Appl. No.:

15/988345

Inventors:

- Sunnyvale CA, US
Vijay Singh - Sunnyvale CA, US
David Andrew Allender - San Jose CA, US

International Classification:

G06F 11/20
G06F 3/06

Abstract:

One or more techniques and/or computing devices are provided for communicating storage controller failures utilizing service processor traps. A first storage controller, of a first storage cluster, has a disaster recovery relationship with a second storage controller of a second storage cluster. The first storage controller comprise a first service processor configured to monitor health of the first storage controller. Responsive to identifying a failure of the first storage controller, the first service processor uses stored communication configuration of a second service processor of the second storage controller to send a service processor trap to the second service processor. In this way, the second service processor initiates a switchover operation by the second storage controller to provide clients with failover access to data previously available through the first storage controller before the failure. Proactive notification of storage controller failures utilizing service processor traps reduces client data access disruptions.

US Patent:

20170116099, Apr 27, 2017

Filed:

Oct 22, 2015

Appl. No.:

14/920391

Inventors:

- Sunnyvale CA, US
Vijay Singh - San Jose CA, US
David Andrew Allender - San Jose CA, US

International Classification:

G06F 11/20
G06F 3/06

Abstract:

One or more techniques and/or computing devices are provided for communicating storage controller failures utilizing service processor traps. A first storage controller, of a first storage cluster, has a disaster recovery relationship with a second storage controller of a second storage cluster. The first storage controller comprise a first service processor configured to monitor health of the first storage controller. Responsive to identifying a failure of the first storage controller, the first service processor uses stored communication configuration of a second service processor of the second storage controller to send a service processor trap to the second service processor. In this way, the second service processor initiates a switchover operation by the second storage controller to provide clients with failover access to data previously available through the first storage controller before the failure. Proactive notification of storage controller failures utilizing service processor traps reduces client data access disruptions.