PCI Hot Plug User's Guide 2.5.1

1.5.2 Software

I/O Multipathing is a framework for high reliability I/O. It provides Path Redundant configuration and Medium Redundant configuration. The Path Redundant configuration enhances reliability by providing two or more paths for a device, and increases throughput whenever a device can be accessed simultaneously with two or more paths. The Medium Redundant configuration enhances reliability by providing two or more units (media) with the same connection path. In the case of a disk, this function is generally called software mirroring.