HP XC System Software Installation Guide Version 4.0

10 Reinstalling HP XC System Software Version 4.0
This chapter describes how to reinstall HP XC System Software Version 4.0 on a system that is
already running Version 4.0.
Reinstalling an HP XC system with the same release might be necessary if you participated as a
field test site of an advance development kit (ADK) or an early release candidate kit (RC).
The procedure is different depending on the hardware model:
• “Reinstalling HP XC when the Hardware Configuration Contains HP ProLiant Hardware
Models” (page 155)
• “Reinstalling HP XC when the Hardware Configuration Contains HP Integrity Hardware
Models” (page 156)
10.1 Reinstalling HP XC when the Hardware Configuration Contains HP
ProLiant Hardware Models
This section describes the following tasks:
• “Reinstalling All Nodes” (page 155)
• “Reinstalling Selected Nodes” (page 155)
NOTE: If client nodes were previously configured with software RAID and you want to remove
the RAID configuration during the reinstallation, see the HP XC System Software Administration
Guide for instructions on how to remove software RAID.
10.1.1 Reinstalling All Nodes
Follow this procedure to reinstall HP XC System Software Version 4.0 if the hardware
configuration contains HP ProLiant hardware with Opteron or Xeon chip architectures:
1. Begin this procedure as the root user on the head node.
2. If SLURM is configured, ensure that all jobs are drained from all nodes, where nodelist
represents the entire set of client nodes (for example, n[1–64]):
# scontrol update NodeName=nodelist State=DRAIN Reason="system shutdown"
3. Shut down all nodes:
# stopsys
4. Insert the HP XC Version 4.0 DVD distribution media in the DVD tray on the head node.
5. Reboot the head node to start the Kickstart installation:
# reboot
6. Follow the instructions in this document, beginning with Chapter 2 (page 35), to complete
the system installation.
10.1.2 Reinstalling Selected Nodes
Follow this procedure to reinstall one or more HP ProLiant client nodes from the latest golden
image on the image server. This procedure sets the specified nodes to network boot from the
DHCP server and automatically starts a reinstallation operation on the specified nodes by
temporarily removing the appropriate local boot file in the /tftpboot/pxelinux.cfg directory
for each node to be reinstalled. This example assumes nodes n1 through n5 are being reinstalled.
1. Begin this procedure as the root user on the head node.
2. If SLURM is configured, ensure that all jobs are drained from the affected nodes:
# scontrol update NodeName=n[1-5] State=DRAIN Reason="system shutdown"
3. Prepare the specified nodes to network boot instead of booting from local disk:
10.1 Reinstalling HP XC when the Hardware Configuration Contains HP ProLiant Hardware Models 155