HP I Dual Channel Ultra160 SCSI Host Adapter A6829A manual Specifying Scsi Parameters

NOTE

Installing the A6829A Adapter

Specifying SCSI Parameters

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.

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

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