Installation guide

20 Chapter 2:Hardware Installation and Operating System Configuration
Table 2–4 Power Switch Hardware Table
Hardware Quantity Description Required
Serial power
switches
Two
Power switches enable each cluster
system to power-cycle the other cluster
system. See Section 2.4.2, Configuring
Power Switches for information about
using power switches in a cluster. Note
that clusters are configured with either
serial or network attached power switches
and not both.
The following serial attached power
switch has been fully tested:
RPS-10 (model M/HD in the
US, and model M/EC in
Europe), which is available from
http://www.wti.com/rps-10.htm. Refer to
Section A.1.1, Setting up RPS-10 Power
Switches
Latent support is provided for the
following serial attached power switch.
This switch has not yet been fully tested:
APC Serial On/Off Switch (partAP9211),
http://www.apc.com
Strongly
recommended
for data
integrity
under all
failure
conditions
Null modem
cable
Two
Null modem cables connect a serial port on a
cluster system to a serial power switch. This
serial connection enables each cluster system
to power-cycle the other system. Some power
switches may require different cables.
Only if using
serial power
switches
Mounting
bracket
One Some power switches support rack mount
configurations and require a separate mounting
bracket (e.g. RPS-10).
Only for rack
mounting
power
switches