## Storage Device Driver Reference

[prev][next][parent][TOC]

### Command-Line Parameter Classes

An adapter device driver command line contains three classes of parameters:

Adapter Device Driver Parameters
Adapter device driver parameters apply to all adapters and units managed by an adapter device driver unless overridden by adapter parameters or unit parameters.
Adapter Parameters
Adapter parameters begin with the (/A) switch and identify a specific adapter card. Parameters following the (/A) switch apply only to the adapter card indicated.
Unit Parameters
Unit parameters apply specific units on an adapter.

Note: In some cases, a parameter may appear as both an Adapter parameter and a Unit parameter. If the host adapter hardware supports specifying a parameter on a per-unit basis, then it is recommended that the adapter device driver support both the per-Adapter and per-Unit forms of the parameter.