ahb4
Adaptec eisa scsi host adapter driver
Usage
device ahb device scbus
Overview
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 ahb 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.