MFI(4)			 BSD 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.

HARDWARE
     The mfi driver supports the following hardware:

     o	 LSI MegaRAID SAS 8408E
     o	 LSI MegaRAID SAS 8480E
     o	 LSI MegaRAID SAS 1078
     o	 Dell PERC5
     o	 Dell PERC6

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
     .

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

BSD				August 15, 2009 			   BSD