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The service node provides diskless boot and an interface to the management network. The
service node requires that a PCIe SAS adapter and two 600 GB HDD PCIe form factor (in
RAID1 for redundancy) must be installed to support diskless boot. The recommended
location is shown on Figure 1-45. The SAS PCIe must reside in PCIe slot 16 and the HDDs in
slots 15 and 14.
The service node also contains a 1 Gb Enet PCIe card that is in PCIe slot 17.
Figure 1-45 Service node
1.7.4 Server and management networks
Figure 1-46 on page 56 shows the logical structure of the two Ethernet networks for the
service
management
cluster that is known as the
network and the
network. In Figure 1-46 on
page 56, the black nets designate the service network and the red nets designate the
management network.
55
Chapter 1. Understanding the IBM Power Systems 775 Cluster
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