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MFI(4)		       FreeBSD 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 con-
     trollers.	Access to RAID arrays (logical disks) from this	driver is pro-
     vided via /dev/mfid? 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 sup-
     ported by amr(4) and will not work	with this driver.

     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.

     A tunable is provided to adjust the mfi driver's behaviour	when attaching
     to	a card.	 By default the	driver will attach to all known	cards with
     high probe	priority.  If the tunable hw.mfi.mrsas_enable is set to	1,
     then the driver will reduce its probe priority to allow mrsas to attach
     to	the card instead of mfi.

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
     +o	 LSI MegaRAID SAS 9260
     +o	 Dell PERC5
     +o	 Dell PERC6
     +o	 IBM ServeRAID M1015 SAS/SATA
     +o	 IBM ServeRAID M1115 SAS/SATA
     +o	 IBM ServeRAID M5015 SAS/SATA
     +o	 IBM ServeRAID M5110 SAS/SATA
     +o	 IBM ServeRAID-MR10i
     +o	 Intel RAID Controller SRCSAS18E
     +o	 Intel RAID Controller SROMBSAS18E

FILES
     /dev/mfid?	 array/logical disk interface
     /dev/mfi?	 management interface

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

SEE ALSO
     amr(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>.

BUGS
     The driver	does not support big-endian architectures at this time.

FreeBSD	10.1			 July 15, 2013			  FreeBSD 10.1

NAME | SYNOPSIS | DESCRIPTION | HARDWARE | FILES | DIAGNOSTICS | SEE ALSO | HISTORY | AUTHORS | BUGS

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