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MFI(4)                DragonFly Kernel Interfaces Manual                MFI(4)


NAME

     mfi -- LSI MegaRAID SAS driver


SYNOPSIS

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

           device pci
           device mfi

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

           mfi_load="YES"


DESCRIPTION

     This driver is for LSI's next generation PCI Express SAS RAID
     controllers.  Access to RAID arrays (logical disks) from this driver is
     provided via /dev/mfid? and access to JBOD disks is provided via
     /dev/mfisyspd? device nodes.  A simple management interface is also
     provided on a per-controller basis via the /dev/mfi? device node.

     The mfi name is derived from the phrase "MegaRAID Firmware Interface",
     which is substantially different than the old "MegaRAID" interface and
     thus requires a new driver.

     Older SCSI and SATA MegaRAID cards are supported by amr(4) and will not
     work with this driver.  Likewise, newer LSI MegaRAID SAS controllers are
     supported by mrsas(4) and will not work with this driver.

     3 Gb/s and 6 Gb/s support both initiator target (IT) and integrated RAID
     (IR) firmware (see http://kb.lsi.com/KnowledgebaseArticle16266.aspx).
     The mfi driver supports controllers with an IR image.  At least some
     cards (such as the IBM ServeRAID M1015) will attach to the mps(4) driver
     when IT firmware is used.

     Two sysctls are provided to tune the mfi driver's behavior when a request
     is made to remove a mounted volume.  By default the driver will disallow
     any requests to remove a mounted volume.  If the sysctl
     dev.mfi.%d.delete_busy_volumes is set to 1, then the driver will allow
     mounted volumes to be removed.  To not detach the mfid device for a busy
     volume that is deleted, set the sysctl dev.mfi.%d.keep_deleted_volumes to
     1.


LOADER TUNABLES

     hw.mfi.msi.enable
             By default, the driver will use MSI if it is supported.  This
             behavior can be turned off by setting this tunable to 0.


HARDWARE

     The mfi driver supports the following hardware:

     o   LSI MegaRAID SAS 1078
     o   LSI MegaRAID SAS 8408E
     o   LSI MegaRAID SAS 8480E
     o   LSI MegaRAID SAS 9240-4i
     o   LSI MegaRAID SAS 9240-8i
     o   LSI MegaRAID SAS 9260-4i
     o   LSI MegaRAID SAS 9260-8i
     o   LSI MegaRAID SAS 9260DE-8i
     o   LSI MegaRAID SAS 9260-16i
     o   LSI MegaRAID SAS 9261-8i
     o   LSI MegaRAID SAS 9280-4i4e
     o   LSI MegaRAID SAS 9280-8e
     o   LSI MegaRAID SAS 9280DE-8e
     o   LSI MegaRAID SAS 9280-16i4e
     o   LSI MegaRAID SAS 9280-24i4e
     o   Dell PERC5
     o   Dell PERC6
     o   Dell PERC H710 Embedded
     o   Dell PERC H710 Adapter
     o   Dell PERC H710 Mini (blades)
     o   Dell PERC H710 Mini (monolithics)
     o   Dell PERC H710P Adapter
     o   Dell PERC H710P Mini (blades)
     o   Dell PERC H710P Mini (monolithics)
     o   Dell PERC H810 Adapter
     o   IBM ServeRAID M1015 SAS/SATA
     o   IBM ServeRAID M5015 SAS/SATA
     o   IBM ServeRAID-MR10i
     o   Intel RAID Controller SROMBSAS18E
     o   Intel RAID Controller RS25DB080
     o   Intel RAID Controller RS25NB008


FILES

     /dev/mfid?      array/logical disk interface
     /dev/mfisyspd?  JBOD disk interface
     /dev/mfi?       management interface


DIAGNOSTICS

     mfid%d: Unable to delete busy device  An attempt was made to remove a
     mounted volume.

     mfisyspd%d: Unable to delete busy device  dito for JBOD disks


SEE ALSO

     amr(4), mps(4), mrsas(4), pci(4), mfiutil(8)


HISTORY

     The mfi driver first appeared in FreeBSD 6.1.


AUTHORS

     The mfi driver and this manual page were written by Scott Long
     <scottl@FreeBSD.org>.

DragonFly 4.1                  November 28, 2014                 DragonFly 4.1

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