Types of Data Link for Storage and Networking

FibreChannel technology lets you increase the distance between the components in a Serviceguard cluster, thus making it possible to design a disaster tolerant architecture. The following table shows some of the distances possible with a few of the available technologies, including some of the FibreChannel alternatives.

The development of DWDM technology allows designers to use dark fiber (high speed communication lines provided by common carriers) to extend the distances that were formerly subject to limits imposed by FibreChannel for storage and Ethernet for network links.

	NOTE: * FDDI Networking is a ring topology therefore, the maximum effective distance supported between data centers is 50 kilometers.

	NOTE: Increased distance often means increased cost and reduced speed of connection. Not all combinations of links are supported in all cluster types. For a current list of supported configurations and supported distances, refer to the HP Configuration Guide, available through your HP representative. As new technologies become supported, they will be described in that guide.