HP XC System Software Administration Guide Version 3.1
3 Starting Up and Shutting Down the HP XC System
This chapter addresses the following topics:
• “Understanding the Node States” (page 49)
• “Starting Up the HP XC System” (page 50)
• “Shutting Down the HP XC System” (page 52)
• “Shutting Down One or More Nodes” (page 52)
• “Determining a Node's Power Status” (page 52)
• “Locating a Given Node” (page 53)
• “Disabling and Enabling a Node” (page 53)
3.1 Understanding the Node States
The nodes of the HP XC system exist in various states, which are described in Table 3-1.
A node's state depends on several factors, including the following:
• Is the node powered on?
• Does the node need to be imaged?
The software on client nodes must be synchronized with a central collection of software for the nodes,
called the golden image, which resides on a node called the golden client. Imaging replicates the
software from the golden client onto the node using the rsync or flamethrower utilities. The
golden image and software distribution are discussed in Chapter 10: Distributing Software Throughout
the System (page 129).
• Did the node fail to image?
• Did the node fail to boot?
Table 3-1 Node States
DescriptionNode State
The node requires imaging and is powered off.
Turning on the node's power initiates the imaging process.
Raw_Off
The node requires imaging and is powered on.
The node must be powered off to prepare for imaging.
Raw_On
The node is powered on and should have entered BIOS self-test.
The node can be imaged or booted.
POST
The node is in the process of imaging.
After a successful imaging, the node is placed in the Boot_Ready state.
If the node does not successfully image, the node is placed in the Image_Fail state.
Imaging
The imaging operation failed. The node is returned to the Raw_Off state.Image_Fail
The node is imaged, but currently powered off.
The node is ready to boot. When the node is powered on, it is placed in the POST state.
Boot_Ready
The node is booting.
If the node is successfully booted, the node will be placed in the AVAILABLE state.
If the node does not successfully boot, the node is placed in the Boot_Fail state.
Booting
The node failed to boot.
The node is returned to the Boot_Ready state.
Boot_Fail
The node is ready for use.
AVAILABLE
Nodes transition between node states accordingly. Figure 3-1 illustrates the transition of node states.
3.1 Understanding the Node States 49