Veritas Storage Foundation Intelligent Storage Provisioning 5.0 AdministratorÆs Guide, HP-UX 11i v3, First Edition, May 2008

150 Using capabilities, templates and rules
Storage selection rules
■ Use the specified LUNs from an enclosure:
select "DeviceName"="Enclr1_1","DeviceName"="Enclr1_2"
separateby
A separateby rule is used to describe separation between VxVM objects. This
is typically used to define failure domains to provide greater reliability by
avoiding a single point of failure. For example, a separateby rule can be used
to define that the mirrors of a volume should not share a controller. This makes
the volume resilient to the failure of a controller.
Note: The separateby rule does not take any rule operators.
The following examples demonstrate the application of separateby rules:
■ Allocate VxVM objects on separate enclosures:
separateby "Enclosure"
■ Allocate VxVM objects so that each object tolerates the failure of one
controller and also uses LUNs from different manufacturers:
separateby "VendorName", "Controller"
strong separateby
The strong separateby rule is a more restrictive form of separateby rule,
which does not permit any sharing of attributes for the storage that is assigned
to VxVM objects.
Note: The strong separateby rule does not take any rule operators.
The following example demonstrates the application of the strong
separateby rule:
■ Allocate VxVM objects so that each object is configured on a totally
independent set of spindles.
strong separateby "Spindles"