SPARC M8 and SPARC M7 Servers Administration Guide

Specify Which DCUs Can Be Assigned to a Host

The dcus_assignable property enables you to control which DCUs can be assigned to a host. By default, all of the DCUs are assignable to each host. You should not need to change this property unless it was changed prior to attempting this task.

When you make a DCU available for assignment to a host with the dcus_assignable property, the DCU replaces the existing list of assignable DCUs. For example, if you start with dcus_assignable = /SYS/DCU0, and you want both DCU0 and DCU1 to be available for assignment, you must specify dcus_assignable="/SYS/DCU0 /SYS/DCU1". If, instead, you start with dcus_assignable = /SYS/DCU0, and you specify dcus_assignable="/SYS/DCU1", the list of available DCUs will be changed to only DCU1. DCU0 will no longer be included in the list.

This task uses PDomain_0, DCU0, and HOST0 as examples. You must have the admin role (a) and the reset role (r) to complete this task.

1. Log in to Oracle ILOM.

   See Log In to Oracle ILOM (CLI).

2. Check the availability of the DCUs.

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   Note -  If the DCU you want to make assignable is not listed, you must locate the DCU, unassign it, and make it assignable so that it becomes available before you can assign it to another host. You must also stop the host to make the unassignment take effect.

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   See Determine the Availability of DCUs.

3. If needed, start the host console for the host from which you want to unassign a DCU.

   Starting the host console enables you to view any errors or faults that might prevent you from unassigning the DCU from the host.

   See Start the Host Console.

4. If needed, stop the host to which the DCU is currently assigned.

   See Stop a Host.

5. If needed, unassign the DCU from the host to which it is currently assigned.

   See Unassign DCUs From a Host.

6. Specify which DCUs should be assignable to the host.

   This step assumes that only DCU0 is assigned to HOST0.

   -> set /Servers/PDomains/PDomain_0/HOST dcus_assignable="/SYS/DCU0 /SYS/DCU1"
   Set 'dcus_assignable' to '/SYS/DCU0 /SYS/DCU1'
   
   ->

Related Information

• Determine the Current Assignment of DCUs

• Determine the Availability of DCUs

• Unassign DCUs From a Host

• Assign a DCU to a Host