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

     twa -- 3ware 9000/9500/9550/9650 series SATA RAID controllers driver

     The twa driver is not present in FreeBSD 14.0.

     To	compile	this driver into the kernel, place the following lines in your
     kernel configuration file:

	   device scbus
	   device twa

     Alternatively, to load the	driver as a module at boot time, place the
     following line in loader.conf(5):


     The twa driver provides support for AMCC's	3ware 9000/9500/9550/9650 se-
     ries SATA controllers.

     These controllers are available in	4, 8, 12 or 16-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
     number.  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
     o	 AMCC's	3ware 9500SX-4LP
     o	 AMCC's	3ware 9500SX-8LP
     o	 AMCC's	3ware 9500SX-12
     o	 AMCC's	3ware 9500SX-12MI
     o	 AMCC's	3ware 9500SX-16ML
     o	 AMCC's	3ware 9550SX-4LP
     o	 AMCC's	3ware 9550SX-8LP
     o	 AMCC's	3ware 9550SX-12
     o	 AMCC's	3ware 9550SX-12MI
     o	 AMCC's	3ware 9550SX-16ML
     o	 AMCC's	3ware 9650SE-2LP
     o	 AMCC's	3ware 9650SE-4LPML
     o	 AMCC's	3ware 9650SE-8LPML
     o	 AMCC's	3ware 9650SE-12ML
     o	 AMCC's	3ware 9650SE-16ML
     o	 AMCC's	3ware 9650SE-24M8

     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	13.0			  May 9, 2007			  FreeBSD 13.0


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