A mechanism is provided for balancing I/O among available paths connected to a device. The mechanism partitions paths so a device can use all or only a subset of available paths to a device, depending on the load of I/O for other devices that are sharing the paths. The partitioning of paths is dynamic,...http://www.google.de/patents/US7783663?utm_source=gb-gplus-sharePatent US7783663 - Dynamic path partitioning to multipath storage devices
