HP XC System Software Administration Guide Version 3.1

21 Servicing the HP XC System
This section describes procedures for servicing the HP XC system. For more information, see the service
guide for your cluster platform.
This chapter addresses the following topics:
• “Adding a Node” (page 243)
• “Replacing a Client Node” (page 244)
• “Replacing a System Interconnect Board in an CP6000 System” (page 246)
• “Software RAID Disk Replacement” (page 246)
21.1 Adding a Node
The following procedure describes how to add one or more nodes in the HP XC system:
1. Log in as superuser on the head node.
2. Note the number of nodes currently on your system. You can determine that number with the following
command:
# shownode all | wc -l
3. Prepare the new node hardware as described in the HP XC System Software Hardware Preparation Guide.
4. Cable the new node (or nodes) into the system. See the HP XC System Software documentation for
your system for more information.
5. Start the automatic discovery of the new node or nodes into your system and add them to the
configuration and management database (CMDB).
# cd /opt/hptc/config/sbin
# ./discover --addnode options
See discover(8) to determine which options are appropriate for your system.
6. Verify that any new nodes have been added to your system by running the following command and
compare it with the result from Step 2:
# shownode all | wc -l
7. If the added node is of a type different from the other nodes and if its disk size does not match other
disks in the HP XC system, modify the disk size parameters in the
/opt/hptc/systemimager/etc/model.conf file on the head node, where model refers to the
model type. See the Release Notes for any additional information.
8. If your system is configured for improved availability, enter the transfer_from_avail command:
# transfer_from_avail
9. Run the cluster_config utility to configure the nodes and set the imaging environment:
# ./cluster_config
The cluster_config utility prompts you for key information, as shown here:
a. The following menu is displayed:
[L]ist Nodes, [M]odify Nodes, [H]elp, [P]roceed, [Q]uit:
Modify the default role assignments depending upon your system requirements. When you are
finished with your modifications, enter P to proceed:
21.1 Adding a Node 243