About Bus Width

The firmware suggested default for the A7173A adapter’s bus width is MAX (the A7173A adapter’s maximum bus width, 16 bits [Wide]). However, either of the following bus widths can be used:

8 bits (Narrow)
16 bits (Wide)




	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”, 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”, 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”, for details.

About Bus Width

Technical documentation

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Setting the Bus Width Offline

Setting the Bus Width Online