93 lines
2.7 KiB
Groff
93 lines
2.7 KiB
Groff
.\"
|
|
.\" Copyright (c) 1994 Wilko Bulte
|
|
.\" All rights reserved.
|
|
.\"
|
|
.\" Redistribution and use in source and binary forms, with or without
|
|
.\" modification, are permitted provided that the following conditions
|
|
.\" are met:
|
|
.\" 1. Redistributions of source code must retain the above copyright
|
|
.\" notice, this list of conditions and the following disclaimer.
|
|
.\" 2. Redistributions in binary form must reproduce the above copyright
|
|
.\" notice, this list of conditions and the following disclaimer in the
|
|
.\" documentation and/or other materials provided with the distribution.
|
|
.\" 3. The name of the author may not be used to endorse or promote products
|
|
.\" derived from this software without specific prior written permission
|
|
.\"
|
|
.\" THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
|
|
.\" IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
|
|
.\" OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
|
|
.\" IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
|
|
.\" INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
|
|
.\" NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
|
|
.\" DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
|
|
.\" THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
|
|
.\" (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
|
|
.\" THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
|
|
.\"
|
|
.\" $FreeBSD$
|
|
.\"
|
|
.Dd July 4, 2004
|
|
.Dt AHB 4
|
|
.Os
|
|
.Sh NAME
|
|
.Nm ahb
|
|
.Nd Adaptec EISA SCSI host adapter driver
|
|
.Sh SYNOPSIS
|
|
To compile this driver into the kernel,
|
|
place the following lines in your
|
|
kernel configuration file:
|
|
.Bd -ragged -offset indent
|
|
.Cd "device scbus"
|
|
.Cd "device ahb"
|
|
.Ed
|
|
.Pp
|
|
Alternatively, to load the driver as a
|
|
module at boot time, place the following line in
|
|
.Xr loader.conf 5 :
|
|
.Bd -literal -offset indent
|
|
ahb_load="YES"
|
|
.Ed
|
|
.Sh DESCRIPTION
|
|
This driver provides access to the
|
|
.Tn SCSI
|
|
bus connected to an Adaptec
|
|
AHA-174X host adapters in
|
|
.Dq Em enhanced
|
|
mode.
|
|
Tagged queueing and synchronous SCSI transfers are supported.
|
|
.Sh HARDWARE
|
|
The
|
|
.Nm
|
|
driver supports the following SCSI host adapters:
|
|
.Pp
|
|
.Bl -bullet -compact
|
|
.It
|
|
Adaptec AHA-1740
|
|
.It
|
|
Adaptec AHA-1742
|
|
.It
|
|
Adaptec AHA-1740A
|
|
.It
|
|
Adaptec AHA-1742A
|
|
.El
|
|
.Sh CAVEATS
|
|
The Adaptec 174X is very sensitive to SCSI bus termination and cable
|
|
length.
|
|
It may also have difficulties operating with some modern devices
|
|
that, due to their speed, expose timing problems in the controller.
|
|
There are no known mechanisms for working around device incompatibilities of
|
|
this nature.
|
|
.Sh SEE ALSO
|
|
.Xr aha 4 ,
|
|
.Xr ahc 4 ,
|
|
.Xr aic 4 ,
|
|
.Xr cd 4 ,
|
|
.Xr da 4 ,
|
|
.Xr sa 4 ,
|
|
.Xr scsi 4
|
|
.Sh AUTHORS
|
|
The
|
|
.Nm
|
|
driver was written by
|
|
.An Justin T. Gibbs .
|