NAME

       adw — Advansys PCI 16bit SCSI Host adapter driver

SYNOPSIS

       To compile this driver into the kernel, place the following lines in your kernel configuration file:

             device pci
             device scbus
             device adw

DESCRIPTION

       This  driver  provides  access  to  the  16bit  SCSI bus connected to the Advanced Systems Products, Inc.
       ASC3550 Ultra, and ASC38C0800 Ultra2, SCSI Host Adapter chips.  Both chips support, synchronous transfers
       (20MHz and 40MHz max respectively), 16bit transfers, tagged queueing,  and  up  to  253  concurrent  SCSI
       transactions.

       Per  target  configuration  performed in the AdvanceWare menu, which is accessible at boot, is honored by
       this driver.  This includes synchronous/asynchronous transfers,  maximum  synchronous  negotiation  rate,
       wide  transfers,  disconnection, tagged queueing, and the host adapter's SCSI ID.  The global setting for
       the maximum number of tagged transactions allowed per target is not honored as the CAM SCSI  system  will
       automatically  determine  the  maximum  number  of  tags  a  device can receive as well as guarantee fair
       resource allocation among devices.

HARDWARE

       The adw driver supports SCSI controllers including:

       •   AdvanSys ABP940UW/ABP3940UW
       •   AdvanSys ABP950UW
       •   AdvanSys ABP970UW
       •   AdvanSys ABP3940U2W
       •   AdvanSys ABP3950U2W

SEE ALSO

       adv(4), cd(4), da(4), sa(4), scsi(4)

HISTORY

       The adw driver appeared in FreeBSD 3.0.

AUTHORS

       The adw driver was ported by Justin T. Gibbs from the Linux driver written by Bob Frey of Advanced System
       Products, Inc.  Many thanks to AdvanSys for providing the original driver under a  suitable  license  for
       use in FreeBSD.

Debian                                            July 14, 2004                                           ADW(4)