Qlogic QLA2100F Especificaciones descargar pdf (Pagina 99)

Mixed configuration

Figure 41 on page 74 shows another example of a S/390 or zSeries host system

with four ESCON channels 1. In this example, two FICON channels 2 have

been added to an S/390 or zSeries host. The illustration also shows the

channel-path group 3 and FICON directors 4 through which the two FICON

adapters 5 are installed in the ESS.

The two FICON directors 4 are not required. You can improve reliability by

eliminating a single point of failure. The sngle point of failure might be present if

both FICON channels 2 are connected to a single FICON director. You can

connect the FICON channels 2 to the ESS FICON adapters 5 directly, without

directors.

Figure 41 on page 74 also shows four ESCON adapters 6 and two ESCON

directors 7. This configuration gives you the most flexibility for future I/O changes.

Figure 41 on page 74 illustrates the FICON channels 2 that have been added to

the existing ESCON channel-path group 3. Because the channel-path group has

ESCON and FICON channel paths, it makes migrating easier. This intermixing of

types of channel-paths allows you to nondisruptively add FICON channels 2 to

the host and to add FICON adapters 5 to the ESS.

Notes:

1. The configuration in Figure 41 on page 74 is supported for migration only.

2. Do not use this configuration for an extended period.

3. IBM recommends that you migrate from a mixed channel-path group

configuration to an all FICON channel-path group configuration.

S/390 or

zSeries Host

4 4 4 4

ESS

1 1 1

3 3

S009064

Figure 40. Example of an ESCON configuration

Chapter 7. Attaching to an IBM S/390 or IBM eServer zSeries host 73

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Qlogic QLA2100F Especificaciones Pagina 99