tws (4)

Leading comments

Copyright (c) 2010, 2011 iXsystems, Inc.
All rights reserved.
 written by: Xin LI <delphij@FreeBSD.org>

Redistribution and use in source and binary forms, with or without
modification, are permitted provided that the following conditions
are met:
1. Redistributions of source code must retain the above copyright
   notice, this list of conditions and the following disclaimer.
2. Redistributions in binary form must reproduce the above copyright
   notice, this list of conditions and the follow...

(The comments found at the beginning of the groff file "man4/tws.4freebsd".)

NAME

tws - 3ware 9750 SATA+SAS 6Gb/s RAID controller card driver

SYNOPSIS

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

device scbus device tws

Alternatively, to load the driver as a module at boot time, place the following line in loader.conf5:

tws_load="YES"

DESCRIPTION

The driver provides support for LSI's 3ware 9750 SATA+SAS 6Gb/s RAID controller cards.

These controllers feature the LSISAS2108 6Gb/s SAS RAID-on-Chip (ROC) and are available in 4- and 8-port configurations, supports RAID levels 0, 1, 5, 6, 10, 50 and single disk, with 96 SATA and/or SAS hard drives and SSDs.

For further hardware information, see www.lsi.com

HARDWARE

The driver supports the following SATA/SAS RAID controller:

• LSI's 3ware SAS 9750 series

LOADER TUNABLES

Tunables can be set at the loader(8) prompt before booting the kernel or stored in loader.conf5.

hw.tws.cam_depth

The maximum queued CAM SIM requests for one controller. The default value is 256.

hw.tws.enable_msi

This tunable enables MSI support on the controller if set to a non-zero value. The default value is 0.

hw.tws.queue_depth

The maximum queued requests for one controller.

hw.tws.use_32bit_sgls

Limit the driver to use only 32-bit SG elements regardless whether the operating system is running in 64-bit mode. The default value is 0.

FILES

/dev/da?

array/logical disk interface

/dev/tws?

management interface

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 TWS_DEBUG defined, it prints out a whole bunch of debug messages.

SEE ALSO

da(4), scsi(4)

AUTHORS

An -nosplit The driver was written by An Manjunath Ranganathaiah for LSI and this manual page was written by An Xin LI Aq delphij@FreeBSD.org for iXsystems, Inc.