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 controllers.

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.disable_msi=1

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

    hw.mps.disable_msix=1

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
-nosplit 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.