Specifications

5–19
Compaq HSG80 Array Controller ACS Version 8.4 Configuration and CLI Reference Guide
The following steps show how to connect a pair of dual-redundant controllers to the
host using one switch.
Before cabling, note the following:
■ Ports
❏ The active ports are port 1, controller A and port 2, controller B.
❏ The standby ports are port 2, controller A and port 1, controller B.
❏ Once logical units are added, the active ports will have access to the units.
❏ For a more detailed explanation of active vs. standby ports and how units are
assigned on each port, see “Assigning Unit Numbers in Transparent Failover
Mode,” page 3–10.
■ Cables connecting into the switch
❏ To limit confusion on the switch port connections, start with switch port 0
and increment the cables into the next switch port as you make connections.
1. Configure the controller. See “Configuring in Transparent Failover Mode,”
page 5–12.
2. Ensure the host and adapter are also configured. See the host user’s guide for
details.
3. Connect the cables between host port 1 on both controllers and the switch ports
on the switch.
4. Connect the cables between host port 2 on both controllers and the switch ports
on the switch.
5. Connect the host bus cable between the switch and the host adapters.
IMPORTANT: Figure 5–4 shows two cables for a host connection. The cables
can go either to the same host or they can go into separate hosts.
6. Route and tie the cables as desired.
7. Turn on the subsystem.
Some operating systems may require you to start the host to see the devices
attached to the new controller. See the HSG80 Array Controller ACS Version 8.X
Release Notes for your operating system.