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TWA(4)                 FreeBSD Kernel Interfaces Manual                 TWA(4)

     twa -- 3ware driver for 9000 series PATA/SATA RAID controllers

     device twa

     The twa driver provides support for the following series of PATA/SATA
     RAID controllers:

     +o   9500S-4LP
     +o   9500S-8
     +o   9500S-8MI
     +o   9500S-12
     +o   9500S-12MI

     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.

     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

FreeBSD 4.10                     March 1, 2004                    FreeBSD 4.10


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