HP DS20L - Manual (Page 141)

SRM Console A-53
A.20.12 pk*0_host_id
Sets the controller host bus node ID to a value between 0 and 7.
Syntax: set pk*_host_id scsi_node_id
where scsi_node_id is the bus node ID, a number from 0 to 7.
Each SCSI bus in the system requires a controller. Buses can theoretically support
up to eight devices; however, the eighth device must always be a controller. Each
device on the bus, including the controller, must have a unique ID, which is a
number between 0 and 7. 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 controllers on
the same bus.
To list the controllers on your system, enter the command show device. SCSI
devices begin with the letters “ pk” (for example, pka0). The third letter is the
adapter ID for the controller. When entering the command set pk*0_host_id,
replace the asterisk with the adapter ID letter.