DragonFly On-Line Manual Pages

MPS(4)		      DragonFly Kernel Interfaces Manual		MPS(4)

NAME
     mps -- LSI Fusion-MPT 2 Serial Attached SCSI driver

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

	   device scbus
	   device mps

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

	   mps_load="YES"

DESCRIPTION
     The mps driver provides support for LSI Logic Fusion-MPT 2 SAS con-
     trollers.

HARDWARE
     The mps driver supports the following controllers:

     *	 LSI Logic SAS2004 (4 Port SAS)
     *	 LSI Logic SAS2008 (8 Port SAS)
     *	 LSI Logic SAS2108 (8 Port SAS)
     *	 LSI Logic SAS2116 (16 Port SAS)
     *	 LSI Logic SAS2208 (8 Port SAS)

CONFIGURATION
     To disable MSI interrupts for all mps driver instances, set the following
     tunable value in loader.conf(5):

	   hw.mps.msi.enable=0

     To allow the driver to send multiple task management commands (like
     abort, LUN reset, etc.), set the following variable:

	   hw.mps.X.allow_multiple_tm_cmds=1

     via loader.conf(5) or sysctl(8), where X is the adapter number.  By
     default the driver only sends one task management command at a time, to
     avoid causing a potential controller lock-up.

DEBUGGING
     To enable debugging prints from the mps driver, set the

	   hw.mps.X.debug_level

     variable, where X is the adapter number, either in loader.conf(5) or via
     sysctl(8).  The following bits have the described effects:

	   0x01  Enable informational prints.

	   0x02  Enable tracing prints.

	   0x04  Enable prints for driver faults.

	   0x08  Enable prints for controller events.

SEE ALSO
     cd(4), ch(4), da(4), mpt(4), pci(4), sa(4), scsi(4), targ(4)

HISTORY
     The mps driver first appeared in FreeBSD 9.0.

AUTHORS
     The mps driver was originally written by Scott Long <scottl@FreeBSD.org>.
     This man page was written by Ken Merry <ken@FreeBSD.org>.

BUGS
     This driver is still in development, it has only been tested on the amd64
     architecture and has some known shortcomings:
     *	 No IR (Integrated RAID) support.
     *	 No userland utility support (e.g.  mptutil(8)).
     *	 Sometimes the driver gets into a state where devices arrive and
	 depart multiple times, without user intervention.
     *	 The error recovery code isn't complete.

DragonFly 3.5		      September 13, 2010		 DragonFly 3.5