Start a Host

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You can start each host separately, or you can start all configured hosts on the server. On a SPARC M8-8 or SPARC M7-8 server with two PDomains, there are two hosts: HOST0 and HOST1. On a SPARC M8-8 or SPARC M7-8 server with one PDomain, there is only one host: HOST0. On the SPARC M7-16 server, there are four possible hosts, depending on the configuration: HOST0, HOST1, HOST2, and HOST3.

Note - The host numbers (for example, HOST0) are enumerated at the root ("/") level. At the PDomain level, the host is not enumerated (for example, /Servers/PDomains/PDomain_0/HOST is HOST0).

After you start the host console(s) in one or more terminal sessions (see Start the Host Console), use another session to start the system or host so that you do not miss the initial startup messages. You can use one session to perform these steps in the opposite order. However, you will not see the initial startup messages. If you need to see those messages, view the host console history log.

This task uses PDomain_0, HOST0, and DCU_0 as examples. You must have the reset role (r) to start the system or a specific host.

Log in to Oracle ILOM.
See Log In to Oracle ILOM (CLI).

Start one or more host consoles for the number of hosts that you want to start.
See Start the Host Console.

View the system information.

Check the system health property. If it indicates that the system requires service, check the health details. You might need to address some or all of the faults. The following output has been edited for clarity. The output shows that there are two open problems. As indicated, run the show /System/Open_Problems command to view details about the faults.

-> show /System
...
    Properties:
        health = Service Required
        health_details = PS5 (Power Supply 5), PS6 (Power Supply 4) are faulty.
        Type 'show /System/Open_Problems' for details.
        open_problems_count = 2
...
->

-> show /System/Open_Problems

Open Problems (2)
Date/Time                 Subsystems          Component
------------------------  ------------------  ------------
Tue Sep 27 15:28:13 2015  Power               PS5 (Power Supply 5)
        A power supply AC input voltage failure has occurred. (Probability:100, 
        UUID:7df1a763-018d-c45b-e645-a7717ec5f89e, Resource:/SYS/PS5/SUPPLY,
        Part Number:7068817, Serial Number:465776G+1348B20C46, Reference 
        Document:http://support.oracle.com/msg/SPT-8000-5X)
Tue Sep 27 15:28:19 2015  Power               PS4 (Power Supply 4)
        A power supply AC input voltage failure has occurred. (Probability:100, 
        UUID:532e9def-fe5c-c481-920b-8bc42c680418, Resource:/SYS/PS4/SUPPLY,
        Part Number:7068817, Serial Number:465776G+1348B20C7N, Reference 
        Document:http://support.oracle.com/msg/SPT-8000-5X)
->

View the state and status of the host.
The host can be in any one of these states:
- If the power_state property is Off, the host is not running. You must start the host.
- If the power_state property is On, but the status property is Off, the host is not running. You must start the host.
- If the power_state property is On, and the status property is OpenBoot Primary Boot Loader or OpenBoot Running, the host is running, but it is at the ok prompt. You must boot Oracle Solaris.
- If the power_state property is On, and the status property is Solaris running, the host is running, and it is at the Oracle Solaris prompt. You can log in directly to the PDomain, or you can start the host console.
This output has been edited for clarity.
```
-> show /Servers/PDomains/PDomain_0/HOST
...
        power_state = On
        send_break_action = (Cannot show property)
        sp_name = /SYS/SP0/SPM0
        state_capture_mode = default
        state_capture_on_error = enabled
        state_capture_status = enabled
        status = OpenBoot Running
...
->
```
For the SPARC M7-16 server only, view the dcus_assigned property for the host that you want to start.
```
-> show /Servers/PDomains/PDomain_0/HOST dcus_assigned

   /Servers/PDomains/PDomain_0/HOST
      Properties:
         dcus_assigned = /SYS/DCU0

->
```
If the host has no DCUs assigned to it, you cannot start the host. This message is displayed if you try to start the host:
```
start: No DCUs assigned
```
If no DCUs are assigned, see Assign a DCU to a Host.
If needed, view the disabled components.
See View Disabled Components. Ensure that there are no disabled components that might prevent you from starting the host.

Consider your next step.
- If you want to start the system and all of the configured hosts, use this command.
  This example shows the output for the SPARC M7-8 server with two PDomains, which has two hosts. For a SPARC M8-8 or SPARC M7-8 server with one PDomain, you should see only one host. For the SPARC M7-16 server, you should see four hosts.
```
-> start /System
Are you sure you want to start all of the configured hosts on the system (y/n)? y
Starting /System
start: 
/HOST0: Starting
/HOST1: Starting

->
```
  Note - On the SPARC M7-16 server, if one of the hosts is already running, you cannot use the start /System command. This message is displayed:
```
start: Target already started
```
  If any of the hosts is unconfigured, meaning that a DCU is not assigned to the host, the following message is displayed:
```
start: 
/HOST0: Starting
/HOST1: Starting
/HOST2: Starting
/HOST3: No DCUs assigned
```
- If you want to start a specific host, use this command.
```
-> start /Servers/PDomains/PDomain_0/HOST
Are you sure you want to start /Servers/PDomains/PDomain_0/HOST (y/n) ? y
Starting /Servers/PDomains/PDomain_0/HOST

->
```
Note - To skip being prompted for confirmation, use the -script option in the start command.

If the host has faulty or disabled components, you might not be able to start the host. This message is displayed in the Oracle ILOM output.
```
start: System faults or hardware configuration prevents power on
```
In this case, you might see one of these messages in the host console.
```
SP> NOTICE:   Exclude all of host.  Reason: Can't determine compatibility of /SYS/CMIOU1.
    Remove and reinstall /SYS/CMIOU1 to attempt detection again.
```
```
SP> NOTICE:   Check for usable CPUs in /SYS/DCU0
SP> NOTICE:   Apply configuration rules to /SYS/DCU0
```
Repeat this command for each of the hosts that you started until you see that the host status displays one of these values.
- OpenBoot Primary Boot Loader
- OpenBoot running
- Solaris running
```
-> show /Servers/PDomains/PDomain_0/HOST status

   /Servers/PDomains/PDomain_0/HOST
      Properties:
         status = Solaris running

->
```

SPARC M8 and SPARC M7 Servers Administration Guide

Start a Host

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