5-70 ES45 Owner's Guide
5.14.21 pk*0_host_id
The pk*0_host_id environment variable sets the controller host bus
node ID to a value between 0 and 15.
Each SCSI bus in the system requires a controller. Buses can support up to six-
teen devices; however, the eighth device must be a controller. Each device on
the bus, including the controller, must have a unique ID, which is a number be-
tween 0 and 15. This is the bus node ID number.
On each bus, the default bus node ID for the controller is set to 7. You do not
need to change the controller bus node ID unless you place two or more control-
lers on the same bus.
To list the controllers on your system, enter the show device command. SCSI
controllers begin with the letters “pk” (for example, pka0). The third letter is the
adapter ID for the controller. Replace the asterisk with the adapter ID letter
when entering the set pk*0_host_id command.
The value of pk*0_host_id takes effect only after you reset the system by press-
ing the Reset button or by issuing the init command.
Syntax
set pk*_host_id scsi_node_id
The value for scsi_node_id is the bus node ID, a number from 0 to 15.
Example
In this example, the default bus node ID for a SCSI controller with an adapter
ID is set to bus node ID 7.
P00>>> set pkb0_host_id 7
P00>>> init
.
.
.
P00>>> show pkb0_host_id
pkb0_host_id 7
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