Mechanism for enabling enhanced fibre channel error recovery...

Details Mechanism for enabling enhanced fibre channel error recovery... Mechanism for enabling enhanced fibre channel error recovery...

2008-03-25

2008-03-25

Wilson, Yolanda L (Department: 2113)

Error detection/correction and fault detection/recovery

Data processing system error or fault handling

Reliability and availability

C714S748000, C714S749000

Reexamination Certificate

active

07350114

ABSTRACT:
Systems and methods for performing error recovery in a system utilizing redundant communication links. In one embodiment, a host device is coupled to a sequential device such as a tape drive by a pair of Fiber Channel links. The host is configured to associate an identifier with each command. Upon detecting a failure of the transmission of the command via the first link, the host re-transmits the command via the second link. When the link failure is detected, the status of the last command transmitted before the failure is requested. After receiving the status of the command, a request that recovery start (possibly at a point indicated by the status information) is transmitted to the sequential device. If the recovery request is accepted, performance of the command is completed.

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Device Driver—http://en.wikipedia.org/wiki/Device—Driver.
Shim—http://www.answers.com/shim&r=67#after—ad2.
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