FreeBSD 4.6.2 manual page repository

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adw - Advansys PCI 16bit SCSI Host adapter driver



      adw - Advansys PCI 16bit SCSI Host adapter driver


      controller pci
      controller adw
      For one or more SCSI busses:
      controller scbus0 at adw0


      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 respec‐
      tively), 16bit transfers, tagged queueing, and up to 253 concurrent SCSI
      Per target configuration performed in the AdvanceWare menu, which is
      accessible at boot, is honored by this driver.  This includes syn‐
      chronous/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 transac‐
      tions allowed per target is not honored as the CAM SCSI system will auto‐
      matically determine the maximum number of tags a device can receive as
      well as guarantee fair resource allocation among devices.
      adv(4), cd(4), da(4), sa(4), scsi(4)


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


      The adw driver appeared in FreeBSD 3.0.


Based on BSD UNIX
FreeBSD is an advanced operating system for x86 compatible (including Pentium and Athlon), amd64 compatible (including Opteron, Athlon64, and EM64T), UltraSPARC, IA-64, PC-98 and ARM architectures. It is derived from BSD, the version of UNIX developed at the University of California, Berkeley. It is developed and maintained by a large team of individuals. Additional platforms are in various stages of development.

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