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.

       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.

       mfi does not provide ATA TRIM support.  Refer to mrsas if TRIM support is required.

HARDWARE

       The mfi driver supports the following hardware:

       •   LSI MegaRAID SAS 1078
       •   LSI MegaRAID SAS 8408E
       •   LSI MegaRAID SAS 8480E
       •   LSI MegaRAID SAS 9240
       •   LSI MegaRAID SAS 9260
       •   Dell PERC5
       •   Dell PERC6
       •   IBM ServeRAID M1015 SAS/SATA
       •   IBM ServeRAID M1115 SAS/SATA
       •   IBM ServeRAID M5015 SAS/SATA
       •   IBM ServeRAID M5110 SAS/SATA
       •   IBM ServeRAID-MR10i
       •   Intel RAID Controller SRCSAS18E
       •   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.

Debian                                           March 13, 2019                                           MFI(4)