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AHB(4)		       FreeBSD Kernel Interfaces Manual 		AHB(4)

NAME
     ahb -- Adaptec EISA SCSI host adapter driver

SYNOPSIS
     device ahb
     device scbus0 at ahb0

DESCRIPTION
     This driver provides access to the SCSI bus connected to an Adaptec 174x
     hostadapter in ``enhanced'' mode.	Tagged queueing and synchronous SCSI
     transfers are supported.

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.

SEE ALSO
     aha(4), ahc(4), cd(4), da(4), sa(4), scsi(4)

AUTHORS
     The ahb driver was written by Justin T. Gibbs.

FreeBSD 4.9		       October 15, 1998 		   FreeBSD 4.9