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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 configura-
     tion 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? 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 substan-
     tially 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.

     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 vol-
     ume.  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 1078
     o	 LSI MegaRAID SAS 8408E
     o	 LSI MegaRAID SAS 8480E
     o	 LSI MegaRAID SAS 9260
     o	 Dell PERC5
     o	 Dell PERC6
     o	 IBM ServeRAID M5015 SAS/SATA
     o	 IBM ServeRAID-MR10i
     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.

BSD					   May 12, 2010 				      BSD
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