System and method for concurrent logical device swapping

Details System and method for concurrent logical device swapping System and method for concurrent logical device swapping

2006-08-01

2006-08-01

Baderman, Scott (Department: 2114)

Error detection/correction and fault detection/recovery

Data processing system error or fault handling

Reliability and availability

C714S006130

Reexamination Certificate

active

07085956

ABSTRACT:
A system and method for concurrently performing logical device swaps for at least one logical subsystem, comprising: concurrently performing the following for each logical subsystem of each computer system prior to the occurrence of an event calling for logical device swaps—receiving a list of data storage device pairs, each pair comprising a first device and a corresponding second device and placing each listed second data storage device into a pseudo-online state; and concurrently performing the following for each logical subsystem of each computer system upon the occurrence of an event calling for logical device swaps—replacing a binding to each listed first device with a binding to each corresponding listed second device, wherein the binding causes I/O requests to be directed to the listed first device prior to the replacement, and further wherein the binding causes I/O requests to be directed to the corresponding listed second device subsequent to the replacement.

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