freebsd-nq/share/man/man4/mfi.4

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.Dd August 15, 2009
.Dt MFI 4
.Os
.Sh NAME
.Nm mfi
.Nd "LSI MegaRAID SAS driver"
.Sh SYNOPSIS
To compile this driver into the kernel,
place the following lines in your
kernel configuration file:
.Bd -ragged -offset indent
.Cd "device pci"
.Cd "device mfi"
.Ed
.Pp
Alternatively, to load the driver as a
module at boot time, place the following line in
.Xr loader.conf 5 :
.Bd -literal -offset indent
mfi_load="YES"
.Ed
.Sh 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
.Pa /dev/mfid?
device nodes.
A simple management interface is also provided on a per-controller basis via
the
.Pa /dev/mfi?
device node.
.Pp
The
.Nm
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
.Xr amr 4
and will not work with this driver.
.Pp
Two sysctls are provided to tune the
.Nm
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
.Va dev.mfi.%d.delete_busy_volumes
is set to 1,
then the driver will allow mounted volumes to be removed.
.Sh HARDWARE
The
.Nm
driver supports the following hardware:
.Pp
.Bl -bullet -compact
.It
LSI MegaRAID SAS 8408E
.It
LSI MegaRAID SAS 8480E
.It
LSI MegaRAID SAS 1078
.It
Dell PERC5
.It
Dell PERC6
.El
.Sh FILES
.Bl -tag -width ".Pa /dev/mfid?" -compact
.It Pa /dev/mfid?
array/logical disk interface
.It Pa /dev/mfi?
management interface
.El
.Sh DIAGNOSTICS
.Bl -diag
.It "mfid%d: Unable to delete busy device"
An attempt was made to remove a mounted volume.
.El
.Sh SEE ALSO
.Xr mfiutil 1 ,
.Xr amr 4 ,
.Xr pci 4
.Sh HISTORY
The
.Nm
driver first appeared in
.Fx 6.1 .
.Sh AUTHORS
The
.Nm
driver and this manual page were written by
.An Scott Long Aq scottl@FreeBSD.org .
.Sh BUGS
The driver does not support big-endian architectures at this time.