Specifications

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Compaq HSG80 Array Controller ACS Version 8.4 Configuration and CLI Reference Guide
PREFERRED_PATH=OTHER_CONTROLLER
PREFERRED_PATH=THIS_CONTROLLER
NOPREFERRED_PATH (Default)
Used only in Windows NT operating systems.
May be set only when dual-redundant controllers are operating in a multiple-bus
failover configuration. In a multiple bus failover configuration, the host determines
which controller the units are accessed through. The host’s unit-to-controller settings
always take precedence over the preferred path assigned to units with this switch.
NOTE: If your controllers are configured to operate in transparent-failover mode,
do not set the PREFERRED_PATH switch with the ADD UNIT or SET unit-number
command—otherwise, an error message is displayed. The error message
indicates the assignment of a preferred controller path at the unit level is valid only
when operating in multiple bus failover mode.
When no preferred path is assigned, the unit is targeted through the controller which
detects the unit first after the controllers start.
Select PREFERRED_PATH=THIS_CONTROLLER to instruct “this controller” to
bring the units online.
Select PREFERRED_PATH=OTHER_CONTROLLER to instruct the “other
controller” to bring the units online.
IMPORTANT: Subsystem performance is better if target ID numbers are
balanced across the dual-redundant pair.