UP1500 User’s Manual
Chapter 4 Software Support
UP1500 800-A1
4-22
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
(see
page 4-8). 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.
The syntax is:
set pk*_host_id scsi_node_id
The value for
scsi_node_id
is the bus node ID, a number from 0 to 7.
pk*0_soft_term
Enables or disables SCSI terminators. This command applies to systems that use
the QLogic ISP1040 SCSI controller.
The QLogic ISP1040 SCSI controller implements the 16-bit wide SCSI bus. The
QLogic module has two terminators, one for the low eight bits and one for the
high eight bits.
The syntax is:
set pk*0_soft_term value
The options for
value
tt_allow_login
Enables or disables login to the SRM Console firmware on alternate operator
console ports. If the environment variable
console
(see page 4-18)
is set to
serial, the primary operator console device is the terminal connected through the
Table 4-14 pk*0_soft_term Options
Option
Description
off
Disables termination of all 16 bits.
low (default)
Enables low eight bits and disables high eight bits.
high
Enables high eight bits and disables low eight bits.
on
Enables all 16 bits.
diff
Places the bus in differential mode.
