Computer failure recovery and alert system

• US 6,101,617 A
• Filed: 02/22/1999
• Issued: 08/08/2000
• Est. Priority Date: 10/02/1992
• Status: Expired due to Term

• Current Assignee: Hewlett-Packard Development Company, L.P. (HP Inc.)
• Original Assignee: Compaq Computer Corporation (HP Inc.)
• Inventors: Dow, Randolph O., Perez, Lazaro D., Stimac, Gary A., Burckhartt, David M., Emerson, Theodore F.
• Primary Examiner(s): Beausoliel, Jr., Robert W.
• Assistant Examiner(s): Elmore, Stephen C.
• Application Number:
  US09/256,587
• Time in Patent Office: 533 Days
• Field of Search: 714/23, 714/25, 702/187, 702/108, 702/117, 702/118, 702/119, 702/183, 702/185, 370/241, 370/242
• US Class Current: 714/23
• CPC Class Codes: G06F 11/0757 by exceeding a time limit, i.e. time-out, e.g. watchdogs
• CPC Class Codes: G06F 11/1415 at system level
• CPC Class Codes: G06F 11/22 Detection or location of defective computer hardware by testing during standby operation or during idle time, e.g. start-up testing
• CPC Class Codes: G06F 11/2294 by remote test
• CPC Class Codes: G06F 9/4406 Loading of operating system
• CPC Class Codes: G11C 29/76 using address translation or modifications

Abstract

A computer system includes a timer which times out if the operating system does not periodically reset the timer. When the system fails and no longer resets the timer, the timer times out, and the computer is reset. The system performs its power on program and checks the memory array for bad memory blocks, which are mapped out of the memory. Next, the system alerts the operator of the failure using a pager. The system then reboots itself from a hard drive having two separate bootable partitions, one for the operating system in the first partition, and one for a diagnostics program in the second partition, so that an operator may diagnose and remedy the problem. The operator may set an indication of which partition to use for booting. The system further provides for remote access so that the operator may interact with the diagnostics program from a remote location.

Claims

1. A processor-based system, comprising:

a processor;

system memory coupled for access by the processor;

a non-volatile memory device coupled for access by the processor and containing boot code; and

a failure detection circuit responsive during operation of the processor-based system following initial boot-up to generate a failure signal when a failure is detected;

said processor operable to automatically respond to the generation of said failure signal by automatically resetting the processor-based system and executing a diagnostic routine stored within the processor-based system, the diagnostic routine capable of testing the processor-based system and logging faults found during the testing.

2. The system of claim 1 wherein the diagnostic routine tests the system memory in response to the detection of a failure.

3. The system of claim 1 wherein the diagnostic routine comprises software code stored in said non-volatile memory device.

4. The system of claim 1 wherein the failure detection circuit includes a timer operable to load a countdown value and begin counting down from the countdown value, the timer operable to generate a reset signal when said timer countdown has been completed.

5. The system of claim 4 wherein said failure detection circuit further includes a masking circuit operable to mask said reset signal generated by said timer when said masking circuit is enabled, said masking circuit being enabled after the computer system is powered on.

6. The system of claim 5 and further comprising a software driver executable by said processor for disabling said masking circuit after determining a cause of the failure.

7. The system of claim 1 and further comprising a communications module operable to automatically transmit a request for service upon detection of a failure.

8. The system of claim 7 wherein the communications module automatically pages a system operator upon detection of a failure.

9. The system of claim 8 wherein the communications module enables access from a communication from a remote computer.

10. The system of claim 7 wherein the communications module automatically initiates a communications link with a remote computer.

11. The system of claim 7 wherein the communications module comprises a modem.

12. The system of claim 1 wherein the nonvolatile memory device comprises a hard disk drive.

13. The system of claim 12 wherein the hard disk drive has a plurality of bootable partitions, one partition containing a normal operating system and another partition containing a diagnostic program.

14. The system of claim 1 wherein the processor is operable to automatically cause the processor-based system to be reset by executing the boot code stored in the non-volatile memory device.

15. A processor-based system, comprising:

a processor;

system memory coupled for access by the processor;

a hard disk drive coupled for access by the processor and containing boot code, the processor configured to access the boot code when the processor-based system is power cycled; and

a failure detection circuit responsive to failure detection in said processor-based system during operation following initial boot-up, to generate a failure signal;

wherein the processor is configured to automatically respond to the generation of said failure signal by causing the processor-based system to be reset.

16. The system of claim 15 wherein the processor is configured to automatically respond to the generation of said failure signal by causing the boot code to be executed.

17. The system of claim 15 wherein the processor is configured to automatically respond to the generation of said failure signal by causing code other than said boot code to be executed.

18. The system of claim 17 wherein the hard disk drive includes a plurality of bootable partitions, one partition including said boot code and another partition including said code other than said boot code.

19. The system of claim 15 wherein the processor is operable to automatically execute a diagnostic routine stored within the processor-based system to test the processor-based system in response to the generation of said failure signal, the diagnostic routine capable of logging faults found during the testing.

20. The system of claim 19 wherein the diagnostic routine tests the system memory in response to the generation of said failure signal.

21. The system of claim 19 wherein the diagnostic routine comprises software code stored in said hard disk drive.

22. The system of claim 15 wherein the failure detection circuit includes a timer operable to load a countdown value and begin counting down from the countdown value, the timer operable to generate a reset signal to reset the processor-based system in response to completion of the countdown by said timer.

23. The system of claim 22 wherein said failure detection circuit further includes a masking circuit operable to mask said reset signal generated by said timer when said masking circuit is enabled, said masking circuit being enabled after the processor-based system is powered on.

24. The system of claim 23 and further comprising a software driver executable by said processor for disabling said masking circuit after determining a cause of the failure.

25. The system of claim 15 and further comprising a communications module operable to automatically transmit a request for service upon detection of a failure.

26. The system of claim 25 wherein the communications module automatically pages a system operator upon detection of a failure.

27. The system of claim 26 wherein the communications module enables access from a communication from a remote computer.

28. The system of claim 25 wherein the communications module automatically initiates a communications link with a remote computer.

29. The system of claim 25 wherein the communications module comprises a modem.

30. The system of claim 15 wherein the processor is configured to automatically run a diagnostic routine after the processor-based system is reset, the diagnostic routine testing the system memory for errors, and wherein the processor is further configured to automatically remap the system memory so that any nonfunctional sections of the system memory are not accessed.

31. A computer system, comprising:

a processor;

system memory coupled for access by the processor;

a non-volatile memory device coupled for access by the processor and containing boot code;

a timer circuit to generate a timeout signal in response to completion of a countdown from a countdown value; and

a communications module operable to automatically transmit a request for service in response to the generation of the timeout signal, the communication module operable to receive service commands from a remote computer;

wherein the computer system is operable to automatically run the boot code in response to the generation of the timeout signal.

32. The system of claim 31 wherein the communications module comprises a modem.

33. The system of claim 31 wherein the communications module is operable to automatically page a system administrator to notify the system administrator of the timeout.

34. The system of claim 33 wherein the communication module is operable to be placed in an answer mode to await access by a remote computer.

35. The system of claim 31 wherein the communication module is operable to automatically initiate a communication link with a remote computer in response to the generation of the timeout signal.

36. The system of claim 31 wherein the communication module is operable to be placed in an answer mode to await access by a remote computer.

37. The system of claim 31 wherein the computer system is operable to automatically run a diagnostic routine after the computer system is reset.

38. The system of claim 31 wherein the non-volatile memory device comprises a hard drive.

39. The system of claim 31 wherein the processor comprises a microprocessor.

40. A method of handling a failure in a computer system, the method comprising the computer implemented steps of:

initializing a timer circuit with a countdown value;

counting down from the countdown value within the timer circuit;

periodically reinitializing the timer circuit with the countdown value;

generating a timeout signal if the timer circuit counts down from the countdown value to zero;

automatically logging information relating to the generation of the timeout signal;

automatically transmitting a request for service in response to the generation of the timeout signal; and

automatically restarting the computer in response to the generation of the reset signal.

41. The method of claim 40 and further comprising receiving service commands from a remote computer.

42. The method of claim 40 and further comprising the computer implemented step of automatically attempting to determine the cause of the generation of the timeout signal.

43. The method of claim 42 wherein automatically attempting to determine the cause comprises rebooting the computer into a diagnostic routine.

44. The method of claim 43 wherein the step of automatically transmitting a request for service comprises automatically paging a system administrator to notify the system administrator in response to said timeout signal.

45. The method of claim 40 wherein the step of automatically transmitting a request for service comprises automatically paging a system administrator to notify the system administrator in response to said timeout signal.

46. The method of claim 40 wherein the step of automatically transmitting a request for service comprises automatically initiating a communication link with a remote computer in response to the generation of the timeout signal.

47. The method of claim 40 and further comprising placing the computer system in an answer mode to await access by a remote computer prior to receiving service commands from the remote computer.

48. A processor-based system, comprising:

a processor;

system memory coupled for access by the processor;

a hard disk drive coupled for access by the processor and containing boot code, the processor configured to access the boot code when the processor-based system is power cycled; and

failure detection means for generating a failure signal when a failure is detected during operation of the processor-based system following initial boot-up;

wherein the processor is configured to automatically respond to the detection of a failure by causing the processor-based system to be reset.