For examples of redundant, partially-redundant, and non-redundant host and drive
loop configurations, see “Fibre channel loop configurations” on page 36.
Connecting hosts to a DS4100 single-controller storage server

To connect a host adapter to the DS4100 single-controller storage server RAID

controllers, perform the following steps:
1. Install an SFP in a host port on the RAID controller.
2. Connect the host-system cables to the RAID controller or to switches. Figure 51
shows the location on the RAID controllers where the host-system cables

connect.

Connecting secondary interface cables
Use the Ethernet interface ports on the back of the storage server to connect the
controllers for direct management of the storage subsystems (see “Direct
(out-of-band) management method” on page 35).
This section is applicable to (direct) out-of-band management configurations only. If
your configuration uses host-agent (in-band) management, skip this section.
Controller A
Host A:Host Adapter 1
(or from managed hub
or switch)
Host A:Host Adapter 2
(or from managed hub
or switch)
Controller B
f10ug029
Figure 50. Location of host cables (base storage server)
Host port 1
Host port 2
Ethernet Serial port
AC power
switch
Server ID
switch
AC power
connector
f11ug006
Figure 51. Location of host cables (single-controller storage server)
56 IBM TotalStorage DS4100 Storage Server: Installation, User’s, and Maintenance Guide