Understand and pay attention to the following points when changing the configuration in a cluster system.
Before registering disks with a class, perform resource registration and register shared disk units with the PRIMECLUSTER resource database.
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For details on resource registration, see "6.3 Shared Disk Resource Registration."
Disks that have not been registered with the resource database yet cannot be registered with a shared class.
Disks that have not been registered with the resource database yet can be registered with a root class [EFI] or a local class.
When expanding the scope of a local class to which disks not registered with the resource database belong into a shared class, perform resource registration in advance, and register all disks that belong to the local class with the resource database.
In a cluster system with three or more nodes, if the physical scope of a shared disk does not match with the scope of a shared class, the shared disk cannot be registered to the shared class.
For disks to be registered with a shadow class, disk resource creation is not required.
Do not register certain disks with the resource database in multiple cluster domains.
To perform object operations in a cluster system, enable cluster control. If cluster control is "off", it is impossible to perform shared object operations. Additionally, root and local object operations may cause errors or inconsistency.
