freebsd-nq/share/man/man4/twa.4
2004-04-13 20:57:44 +00:00

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.Dd March 1, 2004
.Dt TWA 4
.Os
.Sh NAME
.Nm twa
.Nd 3ware driver for 9000 series PATA/SATA RAID controllers
.Sh SYNOPSIS
.Cd "device twa"
.Sh DESCRIPTION
The
.Nm
driver provides support for the following series of PATA/SATA RAID
controllers:
.Pp
.Bl -bullet -compact
.It
9500S-4LP
.It
9500S-8
.It
9500S-8MI
.It
9500S-12
.It
9500S-12MI
.El
.Pp
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
.Pa /dev/twa Ns Ar X ,
where
.Ar 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,
.Pa /dev/da Ns Ar Y ,
where
.Ar Y
is the logical unit number.
.Sh DIAGNOSTICS
Whenever the driver encounters a command failure, it prints out an error code in
the format:
.Qq Li "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
.Dv TWA_DEBUG
defined, it prints out a whole bunch of debug
messages, the quantity of which varies depending on the value assigned to
.Dv TWA_DEBUG
(0 to 10).
.Sh AUTHORS
The
.Nm
driver and manpage were written by
.An Vinod Kashyap Aq vkashyap@FreeBSD.org .