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MFI(4)				   BSD Kernel Interfaces Manual 			   MFI(4)

     mfi -- LSI MegaRAID SAS driver

     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


     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

     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.

     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

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

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

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

     The mfi driver first appeared in FreeBSD 6.1.

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

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

BSD					   May 12, 2010 				      BSD
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