1. Install SFP modules in host ports on RAID controllers A and B.
Note:
The alignment of the single-ported host channels on controller A are
opposite those of controller B. Before inserting an SFP module into a
host port, verify that the SFP module is rotated correctly to match the
alignment of the host port on the RAID controller. Do not force-fit.
2. Connect the fibre channel cables from the SFP modules in the DS4800 RAID
controller host ports to either the SFP modules in the fibre channel switch or the
SFP modules of the host bus adapters. Figure 61 shows the location on the
RAID controllers where the host-system cables connect.
3. Repeat steps 1 and 2 for each additional redundant host connection. You can
create a maximum of four redundant host connections, as shown in Figure 62
on page 89.
Note:
Figure 62 on page 89 shows that the DS4800 host ports are connected
to four sets of FC host bus adapters (HBAs). You can replace one or all
of these sets of FC HBAs with FC switches as required.
Host A: Host adapter
2 (or from managed
hub or switch)
Controller B
Controller A
Host A: Host adapter
1 (or from managed
hub or switch)
ds48032
Figure 61. Location of host cables on RAID controllers
88 IBM System Storage DS4800 Storage Subsystem: Installation, User’s, and Maintenance Guide
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