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

       The twa driver and manpage were written by Vinod Kashyap <vkashyap@FreeBSD.org>.

Debian                                             May 9, 2007                                            TWA(4)

       The twa driver provides support for AMCC's 3ware 9000/9500/9550/9650 series 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.

       Whenever the driver encounters a command failure, it prints out an error  code  in  the  format:  "ERROR:(<errorsource>:<errorcode>):",  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 supports the following SATA RAID controllers:

       •   AMCC's 3ware 9500S-4LP
       •   AMCC's 3ware 9500S-8
       •   AMCC's 3ware 9500S-8MI
       •   AMCC's 3ware 9500S-12
       •   AMCC's 3ware 9500S-12MI
       •   AMCC's 3ware 9500SX-4LP
       •   AMCC's 3ware 9500SX-8LP
       •   AMCC's 3ware 9500SX-12
       •   AMCC's 3ware 9500SX-12MI
       •   AMCC's 3ware 9500SX-16ML
       •   AMCC's 3ware 9550SX-4LP
       •   AMCC's 3ware 9550SX-8LP
       •   AMCC's 3ware 9550SX-12
       •   AMCC's 3ware 9550SX-12MI
       •   AMCC's 3ware 9550SX-16ML
       •   AMCC's 3ware 9650SE-2LP
       •   AMCC's 3ware 9650SE-4LPML
       •   AMCC's 3ware 9650SE-8LPML
       •   AMCC's 3ware 9650SE-12ML
       •   AMCC's 3ware 9650SE-16ML
       •   AMCC's 3ware 9650SE-24M8

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

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

             devicescbusdevicetwa

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

             twa_load="YES"