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TWS(4) FreeBSD Kernel Interfaces Manual TWS(4)
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.conf(5):
tws_load="YES"
DESCRIPTION
The tws 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 http://www.lsi.com/.
HARDWARE
The tws driver supports the following SATA/SAS RAID controller:
o 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.conf(5).
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: "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
The tws driver was written by Manjunath Ranganathaiah for LSI and this
manual page was written by Xin LI <delphij@FreeBSD.org> for iXsystems,
Inc.
FreeBSD 14.0-RELEASE-p11 October 4, 2011 FreeBSD 14.0-RELEASE-p11