twa(4)

NAME

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

driver

SYNOPSIS

device twa

DESCRIPTION

The twa driver provides support for AMCC's 3ware

9000/9500/9550 series
SATA controllers.

These controllers are available in 4, 8, 12 or 16-port con

figurations,
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.

HARDWARE

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

DIAGNOSTICS

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 mes

sages and
warnings that the driver prints out, depending on the kinds

of errors
that it encounters. If the driver is compiled with TWA_DE

BUG 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).

AUTHORS

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

BSD February 20, 2006

BSD