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

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

     device twa

     The twa driver provides support for the AMCC's 3ware 9000 series
     PATA/SATA controllers.

     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 PATA/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


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