July 2004
Intermediate to advanced
496 pages
16h 46m
English
book
IBM TotalStorage Enterprise Storage Server Implementing ESS Copy Services with IBM eServer zSeries
by Cathy Warrick, Paul Jenkin, Claus Schiefer, Jiri Spacek
Content preview from IBM TotalStorage Enterprise Storage Server Implementing ESS Copy Services with IBM eServer zSeries
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Chapter 5. Extended Remote Copy 243
Figure 5-13 ESCON channels
ESCON directors are switches for ESCON channels, and can also be used as repeaters to
extend the maximum distance. Up to two of them can be cascaded, resulting in a
configuration with three connections: CEC to ESCD; ESCD to ESCD; and ESCD to ESS.
Each of these can be 3 km apart, or 20 km if using XDF.
A local ESCON connection can have a throughput of up to 17 MB/s, but you must consider
that the throughput is a function of distance, and drops with increased distances.
5.20.2 FICON channels
The Fiber Connection (FICON) is a high bandwidth channel type that offers more efficient and
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