Shutting Down a Physical Machine
Shut down a physical machine (PM), or node, to stop it from running when you need to service or replace the PM. Use the following procedures to shut down one and only one PM by using the ztC Edge Console or the power button on the PM.
Cautions:
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Data loss will occur if you use the following procedures to shut down both PMs of a ztC Edge system configured with
two nodes or the one PM of a system configured with
one node. If you need to stop both PMs of a system configured with
two nodes or the one PM of a system configured with
one node, shut down the system (which also shuts down the virtual machines (VMs)), as described in Shutting Down the System.
-
Do not use the -f (force) option with the halt, poweroff, or reboot command of the host operating system of a PM. Doing so causes guests that are active on the same PM to hang.
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A ztC Edge system configured with
two nodes is not fault tolerant when you shut down a PM. For continuous uptime, bring an offline PM back into service as soon as possible.
Note: When you shut down a PM, standby power remains on for lights-out management unless you disconnect the power cord or AC mains power is lost.
To shut down a PM in the ztC Edge Console
To shut down a PM, you must place the PM into maintenance mode, which migrates any VMs running on that PM to the remaining PM (if it exists). On a system with two nodes, the VMs continue to run during this process, which takes a minute or two.
- Determine which PM you want to shut down. If appropriate, use the Identify button (see Identifying a Physical Machine).
- In the ztC Edge Console, click Physical Machines in the left-hand navigation panel.
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Select the appropriate PM (node0 or node1, if it exists) and then click Work On, which changes the PM's Overall State to Maintenance Mode and the Activity state to running (in Maintenance).
- After the PM displays running (in Maintenance), click Shutdown.
After the PM has shut down, its activity is 
off (in Maintenance). You must manually restart the PM.
To shut down a PM with the power button
To shut down a PM by using the power button
You can also shut down a PM by using the power button on the PM. On a system configured with two nodes, the VMs continue to run during this process, which takes a minute or two.
- While both PMs are running, press and release the power button on the front panel of the PM that you want to shut down.
- The system automatically places the PM into maintenance mode, which migrates the VMs running on the PM to the remaining PM.
- The PM automatically shuts down.
When the PM shuts down, the PWR LED or power button on the front panel is not lit, though standby power remains. You must manually restart the PM.
To forcibly power off a PM by using the power button
Caution: If a PM does not turn off after you click Shutdown or press the power button, you may need to forcibly power off the PM. Forcibly powering off a PM destroys its memory state; therefore, do this only as a last resort.
Press the power button on the PM for several seconds to forcibly remove power.
When the PM powers off, the PWR LED or power button on the front panel is not lit, though standby power remains. You must manually restart the PM.