Installation guide

Section 2.1:Choosing a Hardware Configuration 27
Table 2–10 UPS System Hardware Table
Hardware Quantity Description Required
UPS system One or two Uninterruptible power supply (UPS)
systems protect against downtime if
a power outage occurs. UPS systems
are highly recommended for cluster
operation. Ideally, connect the power
cables for the shared storage enclosure
and both power switches to redundant
UPS systems. In addition, a UPS system
must be able to provide voltage for an
adequate period of time, and should be
connected to its own power circuit.
A recommended UPS system is the APC
Smart-UPS 1400 Rackmount available
from http://www.apc.com.
Strongly
recommended
for
availability
2.1.5 Example of a Minimum Cluster Configuration
The hardware components described in Table 2–11, Minimum Cluster Hardware Configuration Com-
ponents can be used to set up a minimum cluster configuration. This configuration does not guarantee
data integrity under all failure conditions, because it does not include power switches. Note that this
is a sample configuration; it is possible to set up a minimum configuration using other hardware.
Table 2–11 Minimum Cluster Hardware Configuration Components
Hardware Quantity
Two servers
Each cluster system includes the following hardware:
Network interface for client access and an Ethernet
heartbeat channel
One Adaptec 29160 SCSI adapter (termination disabled)
for the shared storage connection
Two network cables with RJ45
connectors
Network cables connect a network interface on each cluster
system to the network for client access and Ethernet heartbeats.