Installation guide

FC0153302-00 F A-1
Appendix A
QLDIRECT for Windows NT 4.0 and
Windows 2000
A.1
Introduction
The QLDIRECT driver, coupled with the QLogic Windows NT enhanced miniport
driver, provides the following features:
■ A highly optimized I/O path for normal read and write operations with reduced
CPU utilization and increased parallelization
■ Failover and failback features to reroute I/O operations to the correct path
This appendix provides installation instructions for the QLDIRECT driver in an
already installed Windows NT 4.0 or Windows 2000 operating system.
NOTE: The QLDIRECT driver supports Windows NT 4.0 and Windows 2000.
Earlier versions of these operating systems are not supported.
A.2
QLDIRECT Driver Files
QLDIRECT.SYS requires the QL2200.SYS enhanced miniport driver
version 7.00.00 or above. The latest version of the QLDIRECT driver and
QL2200.SYS enhanced miniport driver for Windows NT and Windows 2000 are
available on the QLogic Web site.
A.3
QLDIRECT Installation
If QLDIRECT is not yet installed on your system, perform the installation procedures
in appendix A.3.1. If the QLFILTER driver is installed on your system, perform the
update procedures in appendix A.3.2.
A.3.1
Initial Installation of QLDIRECT
Perform the following steps to add the QLDIRECT driver to a previously installed
Windows NT 4.0 or Windows 2000 system.
1. If necessary, install the QLA2xx Windows NT 4.0 (see section 4) or
Windows 2000 (see section 5) enhanced miniport driver.
2. Insert the disk that contains the QLDIRECT driver into an appropriate drive.