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
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.