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TWA(4)                   BSD Kernel Interfaces Manual                   TWA(4)

     twa -- 3ware 9000 series SATA RAID controllers driver

     device twa

     The twa driver provides support for the AMCC's 3ware 9000 series SATA

     These controllers are available in 4, 8 or 12-port configurations, and
     support the following RAID levels: 0, 1, 10, 5, 50.  The device nodes for
     the controllers are of the form /dev/twaX, where X is the controller num-
     ber.  The driver is implemented as a SCSI SIM under CAM, and, as such,
     the logical units that it controls are accessible via the device nodes,
     /dev/daY, where Y is the logical unit number.

     The twa driver supports the following SATA RAID controllers:

     o   AMCC's 3ware 9500S-4LP
     o   AMCC's 3ware 9500S-8
     o   AMCC's 3ware 9500S-8MI
     o   AMCC's 3ware 9500S-12
     o   AMCC's 3ware 9500S-12MI

     Whenever the driver encounters a command failure, it prints out an error
     code in the format: "ERROR: (<error source>: <error code>):", followed by
     a text description of the error.  There are other error messages and
     warnings that the driver prints out, depending on the kinds of errors
     that it encounters.  If the driver is compiled with TWA_DEBUG defined, it
     prints out a whole bunch of debug messages, the quantity of which varies
     depending on the value assigned to TWA_DEBUG (0 to 10).

     The twa driver and manpage were written by Vinod Kashyap

BSD                             August 15, 2004                            BSD