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ahb (4)
>> ahb (4) ( FreeBSD man: Специальные файлы /dev/* )
BSD mandoc
NAME
ahb
- Adaptec EISA SCSI host adapter driver
SYNOPSIS
To compile this driver into the kernel,
place the following lines in your
kernel configuration file:
device scbusdevice ahb
Alternatively, to load the driver as a
module at boot time, place the following line in
loader.conf5:
ahb_load="YES"
DESCRIPTION
This driver provides access to the
SCSI
bus connected to an Adaptec
AHA-174X host adapters in
``enhanced
''
mode.
Tagged queueing and synchronous SCSI transfers are supported.
HARDWARE
The
driver supports the following SCSI host adapters:
Adaptec AHA-1740
Adaptec AHA-1742
Adaptec AHA-1740A
Adaptec AHA-1742A
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.
