Expert system for identifying likely failure points in a digital data processing system

Claim 3

A method in accordance with claim 1, wherein said digital data processing system comprises a plurality of units each comprising a plurality of components, said method further comprises the steps of monitoring said stored error entries to determine whether the number of stored error entries associated with a particular unit exceeds a threshold, and collecting said stored error entries associated with said particular unit if said number of said stored entries associated with said particular unit exceeds said threshold, and said analysis step comprises analyzing said collected error entries associated with said particular unit, to identify said pattern of said differing types of error events that corresponds with said one of said plurality of failure theories.

Claim 4

A method in accordance with claim 2, wherein said step of monitoring error entries associated with a particular unit comprises generating a fault entry for each unit having error entries that exceed said threshold, and inserting said fault entries into a fault queue.

Claim 5

A method in accordance with claim 3, wherein each said fault entry identifies a unit and identifies error entries associated with said unit.

Claim 6

A method in accordance with claim 4, wherein said step of collecting said error entries associated with said particular unit comprises retrieving a fault entry from said fault queue, retrieving, from an error log, said error entries associated with said unit identified in said fault entry, and inserting said error entries into an error log subset.

Claim 7

A method in accordance with claim 1, wherein said failure theories comprise communication failure theories, drive-detected non-media failure theories, and media failure theories.

Claim 8

A method in accordance with claim 1, wherein said analyzing step comprises a hierarchical sequence of pattern analysis steps in which said error entries are tested for patterns relating to failures of relative generality before said error entries are tested for patterns relating to failures of relative particularity.

Claim 9

A method in accordance with claim 1, wherein said step of storing said error entries is performed by an operating system that stores said error entries in an error log.

Claim 10

A method in accordance with claim 1, wherein said analyzing step comprises storing said failure theories in a theory file.

Claim 11

A method in accordance with claim 9, wherein said step of identifying a likely failure of a component comprises querying said theory file, and, based on a failure theory in said theory file, notifying a user of a likely failure of said component.

Claim 12

A method in accordance with claim 9, wherein said step of identifying a likely failure of a component comprises querying said theory file, and, based on a failure theory in said theory file, initiating recovery operations, to avoid data loss.

Claim 13

A method in accordance with claim 1, wherein said step of identifying a likely failure of a component comprises predicting failure of a component before said component actually fails.

Claim 14

A method in accordance with claim 1, wherein said step of identifying a likely failure of a component comprises detecting an actual failure of a component.

Claim 15

A method in accordance with claim 1, wherein said step of analyzing said error entries comprises the steps of performing analysis in connection with communications failure theories, if no communications failure theories are satisfied, performing analysis in connection with drive-detected non-media failure theories, and if no drive-detected non-media failure theories are satisfied, performing analysis in connection with media failure theories.

Claim 16

A method in accordance with claim 1, wherein said step of analyzing said error entries comprises the steps of determining whether a sufficient number of error entries that identify communications errors have been stored to justify generating a fault theory entry indicating a likely communications failure, if said sufficient number of error entries that identify communications errors have been stored, comparing at least one number representing occurrences of said error entries that identify communications errors with at least one number representing occurrences of error entries that identify non-media drive-detected errors, and determining whether a ratio of said number representing occurrences of error entries that identify communications errors to said number representing occurrences of error entries that identify non-media drive-detected errors is sufficient to justify generating a fault theory indicating a likely communications failure.

Claim 17

A method in accordance with claim 1, wherein said step of analyzing said error entries comprises the steps of determining whether a sufficient number of error entries that identify non-media drive-detected errors have been stored to justify generating a fault theory entry indicating a likely drive-detected non-media failure, if said sufficient number of said error entries that identify non-media drive-detected errors have been stored, and if most of said error entries that identify non-media drive-detected errors identify a common error type, generating a fault theory entry indicating a likelihood of said common error type, and if said sufficient number of said error entries that identify non-media drive-detected errors have been stored, and if most of said error entries that identify non-media drive-detected errors do no identify a common error type, generating fault theory entries identifying error types most frequently identified by said error entries that identify non-media drive-detected errors.

Claim 18

A method in accordance with claim 1, wherein said step of analyzing said error entries comprises the steps of performing analysis in connection with head matrix failure, if no head matrix failure is likely, performing analysis in connection with bad surfaces, if there are no likely bad surfaces, performing analysis in connection with head slaps, if no head slap failure is likely, performing analysis in connection with errors directed to a servo system, if no servo system failure is likely, performing analysis in connection with read path failure, if no read path failure is likely, performing analysis in connection with bad heads on opposing media surfaces, if there are no likely bad heads on opposing media surfaces, performing analysis in connection with radial scratches, and, if there are no likely radial scratches, performing analysis in connection with bad heads.

Claim 19

An expert system for detecting one of a plurality of likely failures of components in a digital data processing system, comprising a collector module means for collecting a plurality of stored error entries, each error entry containing a plurality of differing indicia identifying components of differing types associated with a single error event in said digital data processing system, and an analyzer module means for analyzing said plurality of differing indicia contained within said error entries, by determining whether there is a substantially random distribution of indicia with respect to a plurality of components of a given type or a concentration of indicia with respect to one or more components of a given type as at least one step in identifying a pattern of indicia identifying components of differing types that corresponds with one of a plurality of failure theories, said analyzer module means identifying a said likely failure of a said component based on said failure theory, said collector module means and said analyzer module means being adapted for implementation by a digital data processing system.

Claim 20

An expert system for detecting one of a plurality of likely failures of components in a digital data processing system, comprising a collector module means for collecting a plurality of stored error entries, each error entry containing a plurality of differing indicia identifying components of differing types associated with a single error event in said digital data processing system, and an analyzer module means for analyzing said plurality of differing indicia contained within said error entries, by determining whether there is a substantially random distribution of indicia with respect to a plurality of components of a given type or a concentration of indicia with respect to one or more components of a given type as at least one step in identifying a pattern of indicia identifying components of differing types that corresponds with one of a plurality of failure theories, said analyzer module means identifying a said likely failure of a said component based on said failure theory, said collector module means and said analyzer module means being adapted for implementation by a digital data processing system.

Claim 21

An expert system in accordance with claim 18, wherein said digital data processing system comprises a plurality of units each comprising a plurality of components, said digital data processing system further comprises a monitor module means for monitoring said error entries to determine whether the number of error entries associated with a particular unit exceeds a threshold, and said collector module means collects said error entries associated with said particular unit for purposes of pattern analysis.

Claim 22

An expert system in accordance with claim 19, wherein said monitor module means generates a fault entry for each unit having error entries that exceed said threshold, and inserts said fault entries into a fault queue.

Claim 23

An expert system in accordance with claim 20, wherein each said fault entry identifies a unit and identifies error entries associated with said unit.

Claim 24

An expert system in accordance with claim 21, wherein said collector module means retrieves a fault entry from said fault queue, retrieves, from an error log, said stored error entries associated with said unit identified in said fault entry, and inserts said error entries into an error log subset.

Claim 25

An expert system in accordance with claim 18, wherein said failure theories comprise communication failure theories, drive-detected non-media failure theories, and media failure theories.

Claim 26

An expert system in accordance with claim 18, wherein said analyzer module means analyzes said error entries in a hierarchical sequence of pattern analysis steps in which said error entries are tested for patterns relating to failures of relative generality before said error entries are tested for patterns relating to failures of relative particularity

Claim 27

An expert system in accordance with claim 18, further comprising an operating system for storing said error entries in an error log.

Claim 28

An expert system in accordance with claim 18, wherein said analyzer module means stores said failure theories in a theory file.

Claim 29

An expert system in accordance with claim 26, further comprising a notification module means for querying said theory file, and, based on a failure theory in said theory file, notifying a user of likely failure of said component.

Claim 30

An expert system in accordance with claim 26, further comprising a recovery module means for querying said theory file, and, based on a failure theory in said theory file, initiating recovery operations, to avoid data loss.

Claim 31

An expert system in accordance with claim 18, wherein said analyzer module means predicts failure of a component before said component actually fails.

Claim 32

An expert system in accordance with claim 18, wherein said analyzer module means detects an actual failure of a component.

Claim 33

An expert system in accordance with claim 18, wherein said analyzer module means performs analysis of said error entries in connection with communications failure theories, if no communications failure theories are satisfied, performs analysis of said error entries in connection with drive-detected non-media failure theories, and if no drive-detected non-media failure theories are satisfied, performs analysis of said error entries in connection with media failure theories.

Claim 34

An expert system in accordance with claim 18, wherein said analyzer module means determines whether a sufficient number of error entries that identify communications errors have been stored to justify generating a fault theory entry indicating a likely communications failure, if said sufficient number of error entries that identify communications errors have been stored, said analyzer module means compares at least one number representing occurrences of said error entries that identify communications errors with at least one number representing occurrences of error entries that identify non-media drive-detected errors, and said analyzer module means determines whether a ratio of said number representing occurrences of error entries that identify communications errors to said number representing occurrences of error entries that identify non-media drive-detected errors is sufficient to justify generating a fault theory indicating a likely communications failure.

Claim 35

An expert system in accordance with claim 18, wherein said analyzer module means determines whether a sufficient number of error entries that identify non-media drive-detected errors have been stored to justify .generating a fault theory entry indicating a likely drive-detected non-media failure, if said sufficient number of said error entries that identify non-media drive-detected errors have been stored, and if most of said error entries that identify non-media drive-detected errors identify a common error type, said analyzer module means generates a fault theory entry indicating a likelihood of said common error type, and if said sufficient number of said error entries that identify non-media drive-detected errors have been stored, and if most of said error entries that identify non-media drive-detected errors do no identify a common error type, said analyzer module means generates fault theory entries identifying error identify non-media drive-detected errors types most frequently identified by said error entries that

Claim 36

An expert s stem in accordance with claim 18, wherein said analyzer module means performs analysis in connection with head matrix failure, if no head matrix failure is likely, said analyzer module means performs analysis in connection with bad surfaces, if there are no likely bad surfaces, said analyzer module means performs analysis in connection with head slaps, if no head slap failure is likely, said analyzer module means performs analysis in connection with errors directed to a servo system, if no servo system failure is likely, said analyzer module means performs analysis in connection with read path failure, if no read path failure is likely, said analyzer module means performs analysis in connection with bad heads on opposing media surfaces, if there are no likely bad heads on opposing media surfaces, said analyzer module means performs analysis in connection with radial scratches, and if there are no likely radial scratches, said analyzer module means performs analysis in connection with bad heads.

Claim 37

An expert system for detecting one of a plurality of likely failures of components in a digital data processing system, said digital data processing system comprising a plurality of units each comprising a plurality of said components, said expert system comprising an operating system means for storing in an error log a plurality of error entries, each error entry containing a plurality of differing indicia identifying components of differing types associated with a single error event in said digital data processing system, a monitor module means for monitoring said error entries to determine whether the number of error entries associated with a particular unit exceeds a threshold, generating a fault entry for each unit having error entries that exceed said threshold, each said fault entry identifying a unit and identifying said error entries associated with said unit, and inserting said fault entries into a fault queue, a collector module means for retrieving a fault entry from said fault queue, retrieving, from said error log, stored error entries associated with a unit identified in said fault entry, and inserting said error entries into an error log subset, an analyzer module means for analyzing said plurality of differing indicia contained within said error entries in said error log subset, by determining whether there is a substantially random distribution of indicia with respect to a plurality of components of a given type or a concentration of indicia with respect to one or more components of a given type as at least one step in identifying a pattern of indicia identifying components of differing types that corresponds with one of a plurality of failure theories, said analyzer module means storing said failure theory in a theory file, a notification module means for querying said theory file, and, based on a failure theory in said theory file, notifying a user of likely failure of said component, and a recovery module means for querying said theory file, and, based on a failure theory in said theory file, initiating recovery operations, to avoid data loss, said operating system means, said monitor module means, said collector module means, said analyzer module means, said notification module means, and said recover module means being adapted for implementation by a digital data processing system.

Claim 38

An expert system for detecting one of a plurality of likely failures of components in a digital data processing system, said digital data processing system comprising a plurality of units each comprising a plurality of said components, said expert system comprising an operating system means for storing in an error log a plurality of error entries, each error entry containing a plurality of differing indicia identifying components of differing types associated with a single error event in said digital data processing system, a monitor module means for monitoring said error entries to determine whether the number of error entries associated with a particular unit exceeds a threshold, generating a fault entry for each unit having error entries that exceed said threshold, each said fault entry identifying a unit and identifying said error entries associated with said unit, and inserting said fault entries into a fault queue, a collector module means for retrieving a fault entry from said fault queue, retrieving, from said error log, stored error entries associated with a unit identified in said fault entry, and inserting said error entries into an error log subset, an analyzer module means for analyzing said plurality of differing indicia contained within said error entries in said error log subset, by determining whether there is a substantially random distribution of indicia with respect to a plurality of components of a given type or a concentration of indicia with respect to one or more components of a given type as at least one step in identifying a pattern of indicia identifying components of differing types that corresponds with one of a plurality of failure theories, said analyzer module means storing said failure theory in a theory file, a notification module means for querying said theory file, and, based on a failure theory in said theory file, notifying a user of likely failure of said component, and a recovery module means for querying said theory file, and, based on a failure theory in said theory file, initiating recovery operations, to avoid data loss, said operating system means, said monitor module means, said collector module means, said analyzer module means, said notification module means, and said recover module means being adapted for implementation by a digital data processing system.

Claim 39

An expert system in accordance with claim 18, wherein said digital data processing system that implements said collector module means and said analyzer module means is said digital data processing system in which said expert system detects likely failures.

Claim 40

An expert system in accordance with claim 35, wherein said digital data processing system that implements said operating system means, said monitor module means, said collector module means, said analyzer module means, said notification module means, and said recovery module means is said digital data processing system in which said expert system detects likely failures.

Claim 43

A method in accordance with claim 38, wherein said step of monitoring error entries associated with a particular unit comprises generating a fault entry for each unit having error entries that exceed said threshold, and inserting said fault entries into a fault queue.

Claim 44

A method in accordance with claim 39, wherein each said fault entry identifies a unit and identifies error entries associated with said unit.

Claim 45

A method in accordance with claim 40, wherein said step of collecting said error entries associated with said particular unit comprises retrieving a fault entry from said fault queue, retrieving, from an error log, said error entries associated with said unit identified in said fault entry, and inserting said error entries into an error log subset.

Claim 52

An expert system for detecting one of a plurality of likely failures of components in a digital data processing system, said digital data processing system comprising a plurality of units each comprising a plurality of said components, comprising a monitor module means for monitoring a plurality of stored error entries, each error entry containing a plurality of differing indicia identifying components of differing types associated with a single error event in said digital data processing system, to determine whether the number of error entries associated with a particular unit exceeds a threshold, a collector module means for collecting said error entries associated with said particular unit, and an analyzer module means for analyzing said plurality of differing indicia contained within said collected error entries, by determining whether there is a substantially random distribution of indicia with respect to a plurality of components of a given type or a concentration of indicia with respect to one or more components of a given type as at least one step in identifying a pattern of indicia identifying components of differing types that corresponds with one of a plurality of failure theories, said analyzer module means identifying a said likely failure of a said component based on said failure theory, said monitor module means, said collector module means and said analyzer module means being adapted for implementation by a digital data processing system.

Claim 53

An expert system for detecting one of a plurality of likely failures of components in a digital data processing system, said digital data processing system comprising a plurality of units each comprising a plurality of said components, comprising a monitor module means for monitoring a plurality of stored error entries, each error entry containing a plurality of differing indicia identifying components of differing types associated with a single error event in said digital data processing system, to determine whether the number of error entries associated with a particular unit exceeds a threshold, a collector module means for collecting said error entries associated with said particular unit, and an analyzer module means for analyzing said plurality of differing indicia contained within said collected error entries, by determining whether there is a substantially random distribution of indicia with respect to a plurality of components of a given type or a concentration of indicia with respect to one or more components of a given type as at least one step in identifying a pattern of indicia identifying components of differing types that corresponds with one of a plurality of failure theories, said analyzer module means identifying a said likely failure of a said component based on said failure theory, said monitor module means, said collector module means and said analyzer module means being adapted for implementation by a digital data processing system.

Claim 54

An expert system in accordance with claim 45, wherein said monitor module means generates a fault entry for each unit having error entries that exceed said threshold, and inserts said fault entries into a fault queue.

Claim 55

An expert system in accordance with claim 46, wherein each said fault entry identifies a unit and identifies error entries associated with said unit.

Claim 56

An expert system in accordance with claim 47, wherein said collector module means retrieves a fault entry from said fault queue, retrieves, from an error log, said stored error entries associated with said unit identified in said fault entry, and inserts said error entries into an error log subset.

Claim 57

An expert system for detecting one of a plurality of likely failures of components in a digital data processing system, comprising a collector module means for collecting a plurality of stored error entries, each error entry containing a plurality of differing indicia identifying components of differing types associated with a single error event in said digital data processing system, and an analyzer module means for analyzing said plurality of differing indicia contained within said collected error entries, by determining whether there is a substantially random distribution of indicia with respect to a plurality of components of a given type or a concentration of indicia with respect to one or more components of a given type as at least one step in identifying a pattern of indicia identifying components of differing types that corresponds with one of a plurality of failure theories, said analyzer module means identifying a said likely failure of a said component based on said failure theory, said analyzer module means determining whether a sufficient number of error entries that identify communications errors have been stored to justify generating a fault theory entry indicating a likely communications failure, and if said sufficient number of error entries that identify communications errors have been stored, said analyzer module means comparing at least one number representing occurrences of said error entries that identify communications errors with at least one number representing occurrences of error entries that identify non-media drive-detected errors, and said analyzer module means determining whether a ratio of said number representing occurrences of error entries that identify communications errors to said number representing occurrences of error entries that identify non-media drive-detected errors is sufficient to justify generating a fault theory indicating a likely communications failure, said collector module means and said analyzer module means being adapted for implementation by a digital data processing system.

Claim 58

An expert system for detecting one of a plurality of likely failures of components in a digital data processing system, comprising a collector module means for collecting a plurality of stored error entries, each error entry containing a plurality of differing indicia identifying components of differing types associated with a single error event in said digital data processing system, and an analyzer module means for analyzing said plurality of differing indicia contained within said collected error entries, by determining whether there is a substantially random distribution of indicia with respect to a plurality of components of a given type or a concentration of indicia with respect to one or more components of a given type as at least one step in identifying a pattern of indicia identifying components of differing types that corresponds with one of a plurality of failure theories, said analyzer module means identifying a said likely failure of a said component based on said failure theory, said analyzer module means determining whether a sufficient number of error entries that identify communications errors have been stored to justify generating a fault theory entry indicating a likely communications failure, and if said sufficient number of error entries that identify communications errors have been stored, said analyzer module means comparing at least one number representing occurrences of said error entries that identify communications errors with at least one number representing occurrences of error entries that identify non-media drive-detected errors, and said analyzer module means determining whether a ratio of said number representing occurrences of error entries that identify communications errors to said number representing occurrences of error entries that identify non-media drive-detected errors is sufficient to justify generating a fault theory indicating a likely communications failure, said collector module means and said analyzer module means being adapted for implementation by a digital data processing system.

Claim 59

An expert system for detecting one of a plurality of likely failures of components in a digital data processing system, comprising a collector module means for collecting a plurality of stored error entries, each error entry containing a plurality of differing indicia identifying components of differing types associated with a single error event in said digital data processing system, and an analyzer module means for analyzing said plurality of differing indicia contained within said collected error entries, by determining whether there is a substantially random distribution of indicia with respect to a plurality of components of a given type or a concentration of indicia with respect to one or more components of a given type as at least one step in identifying a pattern of indicia identifying components of differing types that corresponds with one of a plurality of failure theories, said analyzer module means identifying a said likely failure of a said component based on said failure theory, said analyzer module means determining whether a sufficient number of error entries that identify non-media drive-detected errors have been stored to justify generating a fault theory entry indicating a likely drive-detected non-media failure, if said sufficient number of said error entries that identify non-media drive-detected errors have been stored, and if most of said error entries that identify non-media drive-detected errors identify a common error type, said analyzer module means generating a fault theory entry indicating a likelihood of said common error type, and if said sufficient number of said error entries that identify non-media drive-detected errors have been stored, and if most of said error entries that identify non-media drive-detected errors do no identify a common error type, said analyzer module means generating fault theory entries identifying error types most frequently identified by said error entries that identify non-media drive-detected errors, said collector module means and said analyzer module means being adapted for implementation by a digital data processing system.

Claim 60

An expert system for detecting one of a plurality of likely failures of components in a digital data processing system, comprising a collector module means for collecting a plurality of stored error entries, each error entry containing a plurality of differing indicia identifying components of differing types associated with a single error event in said digital data processing system, and an analyzer module means for analyzing said plurality of differing indicia contained within said collected error entries, by determining whether there is a substantially random distribution of indicia with respect to a plurality of components of a given type or a concentration of indicia with respect to one or more components of a given type as at least one step in identifying a pattern of indicia identifying components of differing types that corresponds with one of a plurality of failure theories, said analyzer module means identifying a said likely failure of a said component based on said failure theory, said analyzer module means determining whether a sufficient number of error entries that identify non-media drive-detected errors have been stored to justify generating a fault theory entry indicating a likely drive-detected non-media failure, if said sufficient number of said error entries that identify non-media drive-detected errors have been stored, and if most of said error entries that identify non-media drive-detected errors identify a common error type, said analyzer module means generating a fault theory entry indicating a likelihood of said common error type, and if said sufficient number of said error entries that identify non-media drive-detected errors have been stored, and if most of said error entries that identify non-media drive-detected errors do no identify a common error type, said analyzer module means generating fault theory entries identifying error types most frequently identified by said error entries that identify non-media drive-detected errors, said collector module means and said analyzer module means being adapted for implementation by a digital data processing system.

Claim 61

An expert system for detecting one of a plurality of likely failures of components in a digital data processing system, comprising. a collector module means for collecting a plurality of stored error entries, each error entry containing a plurality of differing indicia identifying components of differing types associated with a single error event in said digital data processing system, and an analyzer module means for analyzing said plurality of differing indicia contained within said collected error entries, by determining whether there is a substantially random distribution of indicia with respect to a plurality of components of a given type or a concentration of indicia with respect to one or more components of a given type as at least one step in identifying a pattern of indicia identifying components of differing types that corresponds with one of a plurality of failure theories, said analyzer module means identifying a said likely failure of a said component based on said failure theory, said analyzer module means performing analysis in connection with head matrix failure, if no head matrix failure is likely, said analyzer module means performing analysis in connection with bad surfaces, if there are no likely bad surfaces, said analyzer module means performing analysis in connection with head slaps, if no head slap failure is likely, said analyzer module means performing analysis in connection with errors directed to a servo system, if no servo system failure is likely, said analyzer module means performing analysis in connection with read path failure, if no read path failure is likely, said analyzer module means performing analysis in connection with bad heads on opposing media surfaces, if there are no likely bad heads on opposing media surfaces, said analyzer module means performing analysis in connection with radial scratches, and if there are no likely radial scratches, said analyzer module means performing analysis in connection with bad heads said collector module means and said analyzer module means being adapted for implementation by a digital data processing system.

Claim 62

An expert system for detecting one of a plurality of likely failures of components in a digital data processing system, comprising. a collector module means for collecting a plurality of stored error entries, each error entry containing a plurality of differing indicia identifying components of differing types associated with a single error event in said digital data processing system, and an analyzer module means for analyzing said plurality of differing indicia contained within said collected error entries, by determining whether there is a substantially random distribution of indicia with respect to a plurality of components of a given type or a concentration of indicia with respect to one or more components of a given type as at least one step in identifying a pattern of indicia identifying components of differing types that corresponds with one of a plurality of failure theories, said analyzer module means identifying a said likely failure of a said component based on said failure theory, said analyzer module means performing analysis in connection with head matrix failure, if no head matrix failure is likely, said analyzer module means performing analysis in connection with bad surfaces, if there are no likely bad surfaces, said analyzer module means performing analysis in connection with head slaps, if no head slap failure is likely, said analyzer module means performing analysis in connection with errors directed to a servo system, if no servo system failure is likely, said analyzer module means performing analysis in connection with read path failure, if no read path failure is likely, said analyzer module means performing analysis in connection with bad heads on opposing media surfaces, if there are no likely bad heads on opposing media surfaces, said analyzer module means performing analysis in connection with radial scratches, and if there are no likely radial scratches, said analyzer module means performing analysis in connection with bad heads said collector module means and said analyzer module means being adapted for implementation by a digital data processing system.