Method and system for verifying the accuracy of stored data

Details Method and system for verifying the accuracy of stored data Method and system for verifying the accuracy of stored data

1998-02-20

2000-08-29

Palys, Joseph E.

Error detection/correction and fault detection/recovery

Data processing system error or fault handling

Reliability and availability

710 54, 714 42, 714719, H02H 305

Patent

active

061123196

ABSTRACT:
A system for verifying the accuracy of stored data in a computer system where read and write requests can pass earlier-issued read and write requests. The system monitors read and write requests for a variety of data storage locations. When the system detects the first request to write data to a particular location it creates a data structure to represent that location and stores the data. For later write requests to the same location, the system modifies the data structure to store the new data being written, maintaining storage for only the data which can possibly be returned accurately for a read request. The system also monitors responses to read and write requests. For data returned in response to satisfaction of a read request, the system uses the data structure to determine if the returned data is accurate (i.e., if it is among the stored data). If the system determines that the returned data is inaccurate, it issues an error. The system can be used to test a computer device such as a video device using an Accelerated Graphics Port interface, or to monitor the normal operation of a computer system to ensure accuracy.

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"Accelerated Graphics Port Interface Specification", Revision 1.0, Intel Corporation, Jul. 31, 1996.

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