Electrical computers and digital data processing systems: input/ – Input/output data processing – Peripheral monitoring
Reexamination Certificate
2006-07-11
2006-07-11
Peyton, Tammara (Department: 2182)
Electrical computers and digital data processing systems: input/
Input/output data processing
Peripheral monitoring
C710S015000, C710S016000, C710S045000, C709S223000, C709S224000, C714S030000, C714S039000, C714S043000, C714S048000
Reexamination Certificate
active
07076573
ABSTRACT:
An error detection mechanism is provided for detecting sequential and distributed errors in a device I/O stream. The sensitivity of the errors is user definable. The result of the error detection is fed back into the path management software, which may use the error information to decide whether a device path should be disabled. The error detection mechanism sets a time span for a time window and counts the number of errors that occur during the time window. Each time a time window ends with at least one error, the sequential error count and the distributed error count are incremented. However, if an I/O returns without an error, the sequential error count is cleared. If the sequential error count reaches a predetermined limit, the path is disabled. After a predetermined number of time windows, if the distributed error count reaches a predetermined limit, the path is disabled.
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Allen James Patrick
Damron Timothy M.
Tee Stephen M.
Tinnakul Teerasit
Adams-Moe Mary
Dawkins Marilyn Smith
International Business Machines - Corporation
Peyton Tammara
Yee Duke W.
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