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

Authors

       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.

Debian                                           October 4, 2011                                          TWS(4)

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/.

Diagnostics

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

Files

/dev/da?   array/logical disk interface
       /dev/tws?  management interface

Hardware

       The tws 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.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.

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:

             devicescbusdevicetws

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

             tws_load="YES"