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5–30 CLI Commands
PARTITION=partition_number
Identifies the unit number for a partition on a container. The partition-number
identifies the partition associated with the unit number being added. Use the SHOW
container-name command to find the partition numbers used by a storageset or a
single-disk unit.
NOTE: Do not split partitioned units across ports. Partitioned units must be on a
single port.
MAXIMUM_CACHED_TRANSFER=32 (Default)
MAXIMUM_CACHED_TRANSFER=n
Sets the largest number of write blocks to be cached by the controller. The controller
will not cache any transfers over the set size. Accepted write block sizes are 1 through
2048.
PREFERRED_PATH=OTHER_CONTROLLER
PREFERRED_PATH=THIS_CONTROLLER
NOPREFERRED_PATH (Default)
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. The
target ID numbers assigned with the SET controller PORT_1_ID (or PORT_2)
command determines which target ID number the controller uses to respond to the
host.
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.