Clearing a fault condition over a fibre channel path

摘要

A method for clearing a fault condition at a target device is disclosed herein. In selected embodiments, such a method includes detecting a fault condition at a target device and receiving N instructions before the fault condition is cleared, where the N instructions are unexecutable due to the fault condition. N fault condition indicators are transmitted in response to the N instructions. Clearing of the fault condition is detected when the fault condition no longer exists. Acknowledgments corresponding to the fault condition indicators are received, where each acknowledgment indicates that one of the fault condition indicators has been received. A fault clear indicator is transmitted only after both all N fault condition indicators have been received and clearing of the fault condition has been detected. A corresponding system and computer program product are also disclosed herein.

主权项

1. A system for handling faults in a network comprising:
a target device comprising at least one processor, the target device configured to receive data access instructions from an initiator device over a data path; the target device further configured to detect a fault condition rendering the target device unable to execute the data access instructions; the target device further configured to receive N data access instructions from the initiator device after detection of the fault condition but prior to clearing of the fault condition, the N data access instructions being unexecutable on the target device due to the fault condition, wherein N is greater than one; the target device further configured to transmit N fault condition indicators to the initiator device in response to receiving the N data access instructions; the target device further configured to detect clearing of the fault condition; and the target device further configured to transmit a fault clear indicator to the initiator device only after receiving N acknowledgements from the initiator device and detecting clearing of the fault condition, wherein each acknowledgement indicates that a fault condition indicator has been received by the initiator device.