To start the SP system, log in to the control workstation. With authorization for the frames to be started up and the suitable credentials for remote commands and SP trusted services, use the cstartup command.
| Note for high nodes and SP-attached servers |
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High nodes and SP-attached servers take a considerably longer time to power on than thin and wide nodes, depending on the number of processors in the node and the number of adapters. After you have experienced the amount of time your nodes take, you can better estimate the amount of time to specify with the -W flag for the cstartup command. When the cstartup command deals with LPARs, it will always use the default partition profile. There might be times when you need to control the startup of these nodes manually, rather than with the cstartup command. When you do, be very careful of the sequencing that is otherwise automatically handled. For a POWER3 SMP high node with SP Expansion I/O Units in particular, the following additional considerations apply:
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The cstartup command powers on specified nodes that are not powered on, and might reset specified nodes that are already powered on. Those actions are equivalent to manually pressing the hardware switches. Once the hardware-equivalent actions are done, control is passed to boot and init.
| Caution! |
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The cstartup command attempts to power on nodes that are powered off. This has safety implications if someone is working on the nodes. Take proper precautions when using this command. |
To restart an SP system that is already running, use cshutdown -r -G.
The complete syntax of the cstartup command is described in the PSSP: Command and Technical Reference.
You can start or reset nodes with a single cstartup command, as
shown in Table 3.
Table 3. Specifying nodes to start with cstartup
| Command | Meaning |
|---|---|
| cstartup ALL | Starts all nodes in the current system partition. |
| cstartup target_nodes | Starts specific nodes in the current system partition. All nodes listed must be in the current system partition or the command will fail. |
| cstartup -G ALL | Starts all nodes in the physical SP system. |
| cstartup -G target_nodes | Starts specific nodes in the physical SP system, regardless of system partitioning. |
If a node is powered off, the cstartup command powers it on. If the node is already powered on and is not running, this command resets it. The nodes are started in the sequence specified by /etc/cstartSeq. If that file doesn't exist, the nodes are started up in the default sequence.
To start all nodes in the SP system concurrently, ignoring the sequence file if it exists or bypassing the default sequencing if the file does not exist, use the -E flag, as in the following example:
cstartup -E -G ALL
To create the /etc/cstartSeq file, see Defining startup and shutdown sequence files.
To start or reset a specific node within the current system partition, put its name on the cstartup command line. The following example starts the single node in the current system partition named cs6:
cstartup cs6
The command checks for dependencies before starting up the node. It uses the /etc/cstartSeq file, if one exists, or the default sequence rules.
If node cs6 is already running, you must specify either -z or -Z to force the node to be reset. This example resets the node cs6 in the current system partition without checking any sequencing dependencies that cs6 has with other nodes:
cstartup -Z cs6
You can also identify nodes by node number or range of node numbers using the -N flag. The following command starts node numbers 4 through 12 in the current system partition.
cstartup -N 4-12