User guide

Installing the Operating System Drivers 7-17
Remove all IDE or ESDI (ST-506) disk drivers from CONFIG.SYS if you are
using a Smart Array 431 Controller drive. Make sure that the
“BASEDEV=IBM1S506.ADD” line is deleted.
Command Line Switches
You may want to modify the standard behavior of the Compaq ADD driver.
Several command line switches are available for this purpose. The syntax of
the command line switches is:
1. /PERF:[memory blocks]
This command line switch is a non-standard switch implemented for
the CPQARRAY.ADD. It should be used to modify the performance
characteristics of the driver when using a Smart Array 431 Controller.
Under heavy disk utilization this command switch allows greater
performance based on the number associated with the [memory blocks]
parameter. The larger the [memory blocks] parameter the better the
performance under heavy disk utilization. Be aware that when you
increase this parameter, the CPQARRAY.ADD driver uses more
memory.
BASEDEV=CPQARRAY.ADD /PERF:[memory blocks]
Where [memory blocks] = A number in the range of 3 to 9 indicating
the amount of memory blocks allocated per Smart Array 431 Controller
in the system. The driver runs at a default value of 5. To determine the
amount of memory being used you can use this formula:
Number of Smart Array 431 Controllers * [memory blocks] * 64-kb
Example:
BASEDEV=CPQARRAY.ADD /PERF:6
2. /V
The Verbose mode command line switch is a standard command line
switch that causes the driver to print information to the screen when it
loads. The driver identifies itself along with the current revision. Then
information concerning the adapters and the drives attached to them is
provided. Adapter information includes IRQ, slot number, and
configuration order number. Drive information includes physical and
logical drive count, and the geometry information for each
logical drive.