3dc0f562f8
while using LSI RAID adapters as it was completely obscure before: mfi has no TRIM support at all and mrsas provides TRIM if underlying adapter does it (for Non-RAID drives generally).
156 lines
4.0 KiB
Groff
156 lines
4.0 KiB
Groff
.\" Copyright (c) 2006 Scott Long
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.\" All rights reserved.
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.\"
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.\" Redistribution and use in source and binary forms, with or without
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.\" modification, are permitted provided that the following conditions
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.\" are met:
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.\" 1. Redistributions of source code must retain the above copyright
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.\" notice, this list of conditions and the following disclaimer.
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.\" 2. Redistributions in binary form must reproduce the above copyright
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.\" notice, this list of conditions and the following disclaimer in the
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.\" documentation and/or other materials provided with the distribution.
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.\"
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.\" THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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.\" ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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.\" SUCH DAMAGE.
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.\"
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.\" $FreeBSD$
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.\"
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.Dd March 13, 2019
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.Dt MFI 4
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.Os
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.Sh NAME
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.Nm mfi
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.Nd "LSI MegaRAID SAS driver"
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.Sh SYNOPSIS
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To compile this driver into the kernel,
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place the following lines in your
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kernel configuration file:
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.Bd -ragged -offset indent
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.Cd "device pci"
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.Cd "device mfi"
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.Ed
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.Pp
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Alternatively, to load the driver as a
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module at boot time, place the following line in
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.Xr loader.conf 5 :
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.Bd -literal -offset indent
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mfi_load="YES"
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.Ed
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.Sh DESCRIPTION
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This driver is for LSI's next generation PCI Express SAS RAID controllers.
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Access to RAID arrays (logical disks) from this driver is provided via
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.Pa /dev/mfid?
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device nodes.
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A simple management interface is also provided on a per-controller basis via
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the
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.Pa /dev/mfi?
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device node.
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.Pp
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The
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.Nm
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name is derived from the phrase "MegaRAID Firmware Interface", which is
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substantially different than the old "MegaRAID" interface and thus requires
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a new driver.
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Older SCSI and SATA MegaRAID cards are supported by
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.Xr amr 4
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and will not work with this driver.
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.Pp
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Two sysctls are provided to tune the
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.Nm
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driver's behavior when a request is made to remove a mounted volume.
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By default the driver will disallow any requests to remove a mounted volume.
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If the sysctl
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.Va dev.mfi.%d.delete_busy_volumes
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is set to 1,
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then the driver will allow mounted volumes to be removed.
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.Pp
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A tunable is provided to adjust the
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.Nm
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driver's behaviour when attaching to a card.
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By default the driver will attach to all known cards with high probe priority.
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If the tunable
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.Va hw.mfi.mrsas_enable
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is set to 1,
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then the driver will reduce its probe priority to allow
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.Cd mrsas
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to attach to the card instead of
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.Nm .
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.Pp
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.Nm
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does not provide ATA TRIM support.
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Refer to
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.Cd mrsas
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if TRIM support is required.
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.Sh HARDWARE
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The
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.Nm
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driver supports the following hardware:
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.Pp
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.Bl -bullet -compact
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.It
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LSI MegaRAID SAS 1078
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.It
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LSI MegaRAID SAS 8408E
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.It
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LSI MegaRAID SAS 8480E
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.It
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LSI MegaRAID SAS 9240
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.It
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LSI MegaRAID SAS 9260
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.It
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Dell PERC5
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.It
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Dell PERC6
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.It
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IBM ServeRAID M1015 SAS/SATA
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.It
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IBM ServeRAID M1115 SAS/SATA
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.It
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IBM ServeRAID M5015 SAS/SATA
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.It
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IBM ServeRAID M5110 SAS/SATA
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.It
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IBM ServeRAID-MR10i
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.It
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Intel RAID Controller SRCSAS18E
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.It
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Intel RAID Controller SROMBSAS18E
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.El
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.Sh FILES
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.Bl -tag -width ".Pa /dev/mfid?" -compact
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.It Pa /dev/mfid?
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array/logical disk interface
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.It Pa /dev/mfi?
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management interface
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.El
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.Sh DIAGNOSTICS
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.Bl -diag
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.It "mfid%d: Unable to delete busy device"
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An attempt was made to remove a mounted volume.
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.El
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.Sh SEE ALSO
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.Xr amr 4 ,
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.Xr pci 4 ,
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.Xr mfiutil 8
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.Sh HISTORY
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The
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.Nm
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driver first appeared in
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.Fx 6.1 .
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.Sh AUTHORS
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The
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.Nm
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driver and this manual page were written by
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.An Scott Long Aq Mt scottl@FreeBSD.org .
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.Sh BUGS
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The driver does not support big-endian architectures at this time.
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