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? 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.

     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:

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