ahb(4)
NAME
ahb - Adaptec EISA SCSI host adapter driver
SYNOPSIS
device ahb device scbus
DESCRIPTION
- This driver provides access to the SCSI bus connected to an
- Adaptec
AHA-174X host adapters in ``enhanced'' mode. Tagged queue - ing and synchronous SCSI transfers are supported.
HARDWARE
The ahb driver supports the following SCSI host adapters:
+o Adaptec AHA-1740
+o Adaptec AHA-1742
+o Adaptec AHA-1740A
+o 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 con - troller.
There are no known mechanisms for working around device in - compatibilities
of this nature.
SEE ALSO
aha(4), ahc(4), aic(4), cd(4), da(4), sa(4), scsi(4)
AUTHORS
- The ahb driver was written by Justin T. Gibbs.
- BSD July 4, 2004