Russell Allen Myers

US Patent:

54105455, Apr 25, 1995

Filed:

Jul 28, 1992

Appl. No.:

7/920766

Inventors:

Brian Porter - Marlboro MA
Russell L. Myers - Grafton MA

Assignee:

Digital Equipment Corporation - Maynard MA

International Classification:

G06F 1100

US Classification:

371 216

Abstract:

A memory controller having a non-volatile memory is disclosed herein. The memory controller forms part of a computer system that includes a program for accessing the non-volatile memory. When memory errors are detected, data correlative to the detected memory errors, such as error syndromes, is stored in the non-volatile memory. Preferably, during each operating session, the area of the non-volatile memory designated for this type of storage is copied into volatile memory. The volatile memory is updated during the operating session and then copied back to the non-volatile memory when the operating session is terminated. Technicians may access the non-volatile memory to study the error history for diagnostic or design purposes.

US Patent:

52630323, Nov 16, 1993

Filed:

Jun 27, 1991

Appl. No.:

7/721959

Inventors:

Brian Porter - Marlboro MA
Christopher A. Mega - Wilton NH
Russell L. Myers - Grafton MA

Assignee:

Digital Equipment Corporation - Maynard MA

International Classification:

G06F 1110

US Classification:

371 402

Abstract:

A computer system having a memory with an ECC function employs an improved method for handling corrected read data events, so transient errors caused by alpha particle hits in DRAMs may be distinguished from hard errors. When a corrected read data event occurs, a footprint defining its location is compared with previously-stored footprints to determine if this location has failed before. Also, a location showing a corrected read data event is "scrubbed" (data is read, corrected and rewritten) so transient error locations are removed. If another corrected read data event occurs for this same location, after scrubbing, then the location is assumed to have a hard fault, and so the page containing this location is replaced.

US Patent:

57403570, Apr 14, 1998

Filed:

Oct 26, 1994

Appl. No.:

8/329800

Inventors:

Jeffrey L. Gardiner - Needham MA
Gerhard K. Heider - Valbonne, FR
Larry W. Emlich - Colorado Springs CO
Bruce H. Luhrs - Merrimack NH
Michael C. Li - Redmond WA
Michael R. Masters - Castle Rock CO
Russell Lloyd Myers - Grafton MA
Harlo A. Peterson - Colorado Springs CO
Frank M. Robbins - Momument CO
Mark J. Seger - Harvard MA

Assignee:

Digital Equipment Corporation - Maynard MA

International Classification:

G06F 1130

US Classification:

3951851

Abstract:

A method of managing faults in a computer system including the steps of detecting an error, handling the error along a functional hierarchy and, further, handling a fault that caused the error in a management hierarchy which can be operated separately from the functional hierarchy.