HP A6829A PCI Dual Channel Ultra160 SCSI Host Bus Adapter Service and User Guide (May 2003)

Installing the A6829A Adapter
Specifying SCSI Parameters
Chapter 2 23
Specifying SCSI Parameters
To ensure proper operation of the A6829A adapter, the following SCSI
parameters that apply to the entire adapter must be configured correctly:
• SCSI ID (SCSI initiator ID)—see “SCSI IDs” on page 27.
• Maximum data transfer rate (SCSI rate)—see “Maximum Data
Transfer Rate” on page 29.
• Auto termination state—see “Auto Termination” on page 39.
• Bus width—see “Bus Width” on page 42.
NOTE For some of these parameters, you can set the value through commands
in the Boot Console Handler (BCH) menus (on some HP-UX systems);
see Table 2-2 on page 24.
The BCH menus are displayed after the system has booted and before
the OS is running.
If the adapter is new, the SCSI driver uses a default setting suggested by
the system’s firmware, unless you specify a setting through the BCH
menus (if possible). This also happens if the slot in which you install the
adapter has no prior setting for a particular SCSI parameter
If the adapter is new and the slot does have a prior setting, the driver
uses that setting unless you change it through the BCH menus (if
possible).
If the adapter has been used in another slot or in a different system, you
must set the SCSI parameters for the adapter back to their default
values. This is because previously set values for the adapter cannot be
migrated to the new slot or system. See “Setting SCSI Parameters to
Default Values” on page 52 for the steps to follow.
Table 2-2 below is a summary of the supported HP-UX systems and the
SCSI parameters you can set on each one. This table assumes that you
have correct version of PDC on the HP-UX system. To know about the