Error detection/correction and fault detection/recovery – Data processing system error or fault handling – Reliability and availability
Reexamination Certificate
2004-11-15
2008-10-14
Beausoliel, Jr., Robert W (Department: 2113)
Error detection/correction and fault detection/recovery
Data processing system error or fault handling
Reliability and availability
Reexamination Certificate
active
07437608
ABSTRACT:
Provided are a method, system, and program for reassigning storage volumes from a failed processing system to a surviving processing system. A first processing system detects a failure of a second processing system. The first processing system determines device groups of storage devices managed by the failed second processing system and determines for each determined device group, hosts that connect to storage devices in the device group. The first processing system sends, for each device group, a unit check to each determined host indicating failure of each device group through one storage device in the device group to which the determined host connects. The determined hosts execute instructions to terminate any I/O operations in progress on the storage devices in the device group in response to the unit check indicating failure of one storage device in the device group and issue, a command to one storage device for the device group to end the busy condition.
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Kalos Matthew Joseph
Riedy, Jr. Dale Francis
Ripberger Richard Anthony
Yudenfriend Harry Morris
Beausoliel, Jr. Robert W
International Business Machines - Corporation
Konrad Raynes & Victor LLP
Riad Amine
Victor David W.
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