Avago Technologies LSI20160 User Manual

Page 74

4-6

Windows NT 4.0 Device Driver Installation

are only supported under Windows NT 4.0 and later versions. They do
not run under earlier versions of Windows NT.

A Windows application passes SCSI commands to the SCSI devices by
using the SCSI pass-through facility. Refer to the Microsoft
Windows NT 4.0 documentation for more information. This facility allows
applications to directly control and access SCSI devices by filling in a
data structure and calling into the port driver or class driver.

The

SYMC8XX.SYS

and

SYM_HI.SYS

drivers support Ultra SCSI protocol,

providing twice the raw data transfer rate of Fast SCSI. These drivers
also support Ultra2 SCSI protocol, providing quadruple the raw data
transfer rate of Fast SCSI.

The

SYM_U3.SYS

driver supports the Ultra160 SCSI protocol providing up

to 160 Mbytes/s data transfer rates using double transition clocking.
Ultra160 also includes CRC, PPR, and Domain Validation. The Ultra160
SCSI protocol performs 80 megatransfers per second resulting in
approximately double the synchronous data transfer rates of Ultra2 SCSI.

Caution:

Ultra SCSI requires more stringent SCSI bus cabling
setups than Fast SCSI. Ultra2 and Ultra160 require LVD
termination.

The SDMS driver bundled in Windows NT 4.0 is named

SYMC810.SYS

When Windows NT selects the bundled SDMS driver during setup, the
driver information (that is, “Symbios C810 PCI SCSI Host Adapter”)
appears. Although this implies that the driver only supports the
LSI53C810, it actually supports the LSI53C810, LSI53C810A,
LSI53C815, LSI53C825, LSI53C825A, LSI53C860, LSI53C875, and
LSI53C876.

This bundled driver does not “see” or “support” the LSI53C885,
LSI53C895, LSI53C896, LSI53C895A, LSI53C1000, and LSI53C1010
chipsets and any newer host adapters based on these chipsets that
LSI Logic currently produces.

Note:

Keep in mind that the Windows NT 4.0 setup only displays
the driver information, not every controller found by that
driver.

This manual is related to the following products:

LSI20160 (Channel) LSI53C1000 LSI53C1010