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Building an Extended Distance Cluster Using Serviceguard and Software RAID
Types of Data Link for Storage and Networking
Chapter 252
Types of Data Link for Storage and
Networking
Fibre Channel technology lets you increase the distance between the
components in an 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 Fiber Optic 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 Fibre
Channel for storage and Ethernet for network links.
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, see the HP Configuration Guide, available through your HP
representative.
Table 2-1 Link Technologies and Distances
Type of Link
Maximum Distance
Supported
Gigabit Ethernet Twisted Pair 50 meters
Short Wave Fiber 500 meters
Long Wave Fiber 10 kilometers
Dense Wave Division Multiplexing
(DWDM)
100 kilometers