International Business Machines Corporation

James Lamar Hood

Todd Charles Sorenson

Brian Anthony Rinaldi

Micah Robison

Matthew J Kalos

Beth Ann Peterson

Ashwani Kumar

Provided are a method, system, and article of manufacture for synchronizing device error information among nodes. A first node performs an action with respect to a first node error counter for a device in communication with the first node and a second node. The first node transmits a message to the second node indicating the device and the action performed with respect to the first node error counter for the device. The second node performs the action indicated in the message with respect to a second node error counter for the device indicated in the message, wherein the second node error counter corresponds to the first node error counter for the device.

Synchronizing device error information among nodes

A method is disclosed to adjust error thresholds in a data storage and retrieval system. The method supplies a data storage and retrieval system comprising memory and microcode, wherein that microcode comprises one or more default error thresholds. The method determines if the memory comprises one or more operational error thresholds. If the method determines that the memory comprises one or more operational error thresholds, then the method operates the data storage and retrieval system using those one or more operational error thresholds. Alternatively, if the method determines that the memory does not comprise one or more operational error thresholds, then the method sets the one or more default error thresholds as the one or more operational error thresholds.

Method to adjust error thresholds in a data storage and retrieval system

A method is provided to protect against ill-behaved microcode by balancing between an actual occurrence of a hardware problem and a microcode bug setting a flag appearing as a hardware problem. In this method, the error recovery is performed only on a single piece of hardware and no further error recovery action is taken on other pieces of similar hardware. The approach addresses the problem by treating a hit on one card as a hardware problem, but as a bug on subsequent cards. The invention keeps track of whether or not the same event has occurred on the same type of hardware so not to take action on more than one instance of the hardware. Subsequent hits on another instance of the hardware will not trigger the hardware related recovery on additional hardware.

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Tucson, AZ, United States of America

James Lamar Hood