ADW(4) Kernel Interfaces Manual ADW(4) NAME adw -- Advansys PCI 16bit SCSI Host adapter driver SYNOPSIS controller pci controller adw For one or more SCSI busses: controller scbus0 at adw0 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. AdvanSys products incorporating these chips include the ABP[3]940UW, ABP950UW, ABP970UW, ABP3940U2W, and ABP3950U2W. 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 acces- sible at boot, is honored by this driver. This includes synchronous/asyn- chronous 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 al- location among devices. SEE ALSO adv(4), cd(4), da(4), sa(4), scsi(4) 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. HISTORY The adw driver appeared in FreeBSD 3.0. FreeBSD 4.5 February 13, 2000 ADW(4)
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