User's Manual

TIP: HP recommends that you always use the A7173A’s maximum bus width (16 bits), unless
you have Narrow (8-bit) devices on the bus and you are experiencing problems with the
connection.
Setting the Bus Width Offline
For HP 9000 systems, the Boot Console Handler (BCH) menus are used to set bus width offline.
See “Using the BCH Menus on HP 9000 Systems” (page 28), for details.
NOTE: The bus width parameter cannot be set offline on rp24xx and rp54xx systems.
For HP Integrity® systems, EFI is used to set the bus width offline. See “Using the EFI Utility
on HP Integrity Systems” (page 32), for details.
Setting the Bus Width Online
The mptconfig command is used to set the bus width online for all supported systems. See
“Using mptconfig for Online Configuration” (page 40), for details.
About Auto-Termination
The auto-termination feature on the A7173A adapter ensures the SCSI bus will be properly
terminated in any supported configuration.
The auto-termination state for both of the SCSI channels on the A7173A adapter are factory set
to enable auto termination. HP does not recommend disabling auto termination.
NOTE: All supported configurations require auto termination to be enabled on the A7173A
adapter.
26 Configuring the A7173A Adapter