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Installing the A6828A Adapter

Specifying SCSI Parameters

Chapter 2 21

Specifying SCSI Parameters

To ensure proper operation of the A6828A 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 25.

• Maximum data transfer rate (SCSI rate)—see “Maximum Data

Transfer Rate” on page 27.

• Auto termination state—see “Auto Termination” on page 37.

• Bus width—see “Bus Width” on page 39.

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 22.

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 49 for the steps to follow.

Table 2-2 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 correct

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HP A6828A Manual do Utilizador Página 37